Author Archives: James Carroll

A systematic review with procedural assessments and meta-analysis of low level laser therapy in lateral elbow tendinopathy (tennis elbow).

Bjordal JM, Lopes-Martins RA, Joensen J, Couppe C, Ljunggren AE, Stergioulas A, Johnson MI

Institute of Physiotherapy, Faculty of Health and Social Sciences, Bergen University College, Moellendalsvn, 6, 5009 Bergen, Norway.
BACKGROUND: Recent reviews have indicated that low level level laser therapy (LLLT) is ineffective in lateral elbow tendinopathy (LET) without assessing validity of treatment procedures and doses or the influence of prior steroid injections. METHODS: Systematic review with meta-analysis, with primary outcome measures of pain relief and/or global improvement and subgroup analyses of methodological quality, wavelengths and treatment procedures. RESULTS: 18 randomised placebo-controlled trials (RCTs) were identified with 13 RCTs (730 patients) meeting the criteria for meta-analysis. 12 RCTs satisfied half or more of the methodological criteria. Publication bias was detected by Egger’s graphical test, which showed a negative direction of bias. Ten of the trials included patients with poor prognosis caused by failed steroid injections or other treatment failures, or long symptom duration or severe baseline pain. The weighted mean difference (WMD) for pain relief was 10.2 mm [95% CI: 3.0 to 17.5] and the RR for global improvement was 1.36 [1.16 to 1.60]. Trials which targeted acupuncture points reported negative results, as did trials with wavelengths 820, 830 and 1064 nm. In a subgroup of five trials with 904 nm lasers and one trial with 632 nm wavelength where the lateral elbow tendon insertions were directly irradiated, WMD for pain relief was 17.2 mm [95% CI: 8.5 to 25.9] and 14.0 mm [95% CI: 7.4 to 20.6] respectively, while RR for global pain improvement was only reported for 904 nm at 1.53 [95% CI: 1.28 to 1.83]. LLLT doses in this subgroup ranged between 0.5 and 7.2 Joules. Secondary outcome measures of painfree grip strength, pain pressure threshold, sick leave and follow-up data from 3 to 8 weeks after the end of treatment, showed consistently significant results in favour of the same LLLT subgroup (p < 0.02). No serious side-effects were reported. CONCLUSION: LLLT administered with optimal doses of 904 nm and possibly 632 nm wavelengths directly to the lateral elbow tendon insertions, seem to offer short-term pain relief and less disability in LET, both alone and in conjunction with an exercise regimen. This finding contradicts the conclusions of previous reviews which failed to assess treatment procedures, wavelengths and optimal doses.

BMC Musculoskelet Disord 2008 9 75

http://www.ncbi.nlm.NIH.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18510742

Electrophysiologic Effects of a Therapeutic Laser on Myofascial Trigger Spots of Rabbit Skeletal Muscles.

Chen KH, Hong CZ, Kuo FC, Hsu HC, Hsieh YL

From the Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Chiayi, Taiwan (K-HC, H-CH); College of Medicine, Chang Gung University, Taoyuan, Taiwan (K-HC, H-CH); and Department of Physical Therapy, HungKuang University, Taichung, Taiwan (C-ZH, F-CK); and the Department of Physical Therapy, Graduate Institute of Rehabilitation Science, China Medical University, Taichung, Taiwan (Y-LH).

OBJECTIVE:: To better understand the mechanisms of therapeutic lasers for treating human myofascial trigger points, we designed a blinded controlled study of the effects of a therapeutic laser on the prevalence of endplate noise (EPN) recorded from the myofascial trigger spot (MTrS) of rabbit skeletal muscle. DESIGN:: In eight rabbits, one MTrS in each biceps femoris muscle was irradiated with a 660-nm, continuous-wave, gallium-aluminum-arsenate (GaAlAs) laser, at 9 J/cm. The contralateral side of muscle was treated with a sham laser. Each rabbit received six treatments. The immediate and cumulative effects were assessed by the prevalence of EPN with electromyographic (EMG) recordings after the first and last treatments. RESULTS:: Compared with pretreatment values, the percentages of EPN prevalence in the experimental side after the first and last treatments were significantly reduced (P < 0.01 for both). The change in EPN prevalence in the experimental side was significantly greater than in the control side immediately after the first and last treatments (P < 0.05). However, no significant differences were noted between the first and last treatments (P > 0.05). CONCLUSIONS:: In our study, immediate and cumulative effects of a GaAlAs laser applied on MTrS were demonstrated on the basis of the assessment of EPN prevalence. It seems that laser irradiation may inhibit the irritability of an MTrS in rabbit skeletal muscle. This effect may be a possible mechanism for myofascial pain relief with laser therapy.

Am J Phys Med Rehabil 2008 Jul 9

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18617861

Effect of laser phototherapy on the release of fibroblast growth factors by human gingival fibroblasts.

Damante CA, De Micheli G, Miyagi SP, Feist IS, Marques MM

Departamento de Periodontia, Faculdade de Odontologia, Universidade de Sao Paulo, Sao Paulo, Brazil.

The effects of laser phototherapy on the release of growth factors by human gingival fibroblasts were studied in vitro. Cells from a primary culture were irradiated twice (6 h interval), with continuous diode laser [gallium-aluminum-arsenium (GaAlAs), 780 nm, or indium-gallium-aluminum-phosphide (InGaAlP),_660 nm] in punctual and contact mode, 40 mW, spot size 0.042 cm(2), 3 J/cm(2) and 5 J/cm(2) (3 s and 5 s, respectively). Positive [10% fetal bovine serum (FBS)] and negative (1%FBS) controls were not irradiated. Production of keratinocyte growth factor (KGF) and basic fibroblast growth factor (bFGF) was quantified by enzyme-linked immunosorbent assay (ELISA). The data were statistically compared by analysis of variance (ANOVA) followed by Tukey’s test (P </= 0.05). The characterization of the cell line indicated a mesenchymal nature. KGF release was similar in all groups, while that of bFGF was significantly greater (1.49-times) in groups treated with infra-red laser. It was concluded that increased production of bFGF could be one of the mechanisms by which infra-red laser stimulates wound healing.

Lasers Med Sci 2008 Jul 4

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18600291

Low-level laser therapy improves vision in patients with age-related macular degeneration.

Ivandic BT, Ivandic T

University of Heidelberg, Otto-Meyerhof Centre, Heidelberg.

GermanyAbstract Objective: The objective of this study of a case series was to examine the effects of low-level laser therapy (LLLT) in patients with age-related macular degeneration (AMD). Background Data: AMD affects a large proportion of the elderly population; current therapeutic options for AMD are limited, however. Patients and Methods: In total, 203 patients (90 men and 113 women; mean age 63.4 +/- 5.3 y) with beginning (dry) or advanced (wet) forms of AMD (n = 348 eyes) were included in the study. One hundred ninety-three patients (mean age 64.6 +/- 4.3 y; n = 328 eyes) with cataracts (n = 182 eyes) or without cataracts (n = 146 eyes) were treated using LLLT four times (twice per week). A semiconductor laser diode (780 nm, 7.5 mW, 292 Hz, continuous emission) was used for transconjunctival irradiation of the macula for 40 sec (0.3 J/cm(2)) resulting in a total dose of 1.2 J/cm(2). Ten patients (n = 20 eyes) with AMD received mock treatment and served as controls. Visual acuity was measured at each visit. Data were analyzed retrospectively using a t-test. Results: LLLT significantly improved visual acuity (p < 0.00001 versus baseline) in 162/182 (95%) of eyes with cataracts and 142/146 (97%) of eyes without cataracts. The prevalence of metamorphopsia, scotoma, and dyschromatopsia was reduced. In patients with wet AMD, edema and bleeding improved. The improved vision was maintained for 3-36 mo after treatment. Visual acuity in the control group remained unchanged. No adverse effects were observed in those undergoing therapy. Conclusion: In patients with AMD, LLLT significantly improved visual acuity without adverse side effects and may thus help to prevent loss of vision.

Photomed Laser Surg 2008 Jun 26(3) 241-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18588438

Influence of laser Photobiomodulation upon connective tissue remodeling during wound healing.

Medrado AP, Soares AP, Santos ET, Reis SR, Andrade ZA

Laboratory of Experimental Pathology, Oswaldo Cruz Foundation, Rua Waldemar Falcao, 121, Salvador, Bahia 40.296-710, Brazil.

The modulation of collagen fibers during experimental skin wound healing was studied in 112 Wistar rats submitted to laser photobiomodulation treatment. A standardized 8mm-diameter wound was made on the dorsal skin of all animals. In half of them, 0.2ml of a silica suspension was injected along the border of the wound in order to enhance collagen deposition and facilitate observation. The others received saline as vehicle. The treatment was carried out by means of laser rays from an aluminum-gallium arsenide diode semiconductor with 9mW applied every other day (total dose=4J/cm(2)) on the borders of the wound. Tissue sections obtained from four experimental groups representing sham-irradiated animals, laser, silica and the association of both, were studied after 3, 7, 10, 15, 20, 30 and 60 days from the laser application. The wounded skin area was surgically removed and submitted to histological, immunohistochemical, ultrastructural, and immunofluorescent studies. Besides the degree and arrangement of collagen fibers and of their isotypes, the degree of edema, the presence of several cell types especially pericytes and myofibroblasts, were described and measured. The observation of Sirius-red stained slides under polarized microscopy revealed to be of great help during the morphological analysis of the collagen tissue dynamic changes. It was demonstrated that laser application was responsible for edema regression and a diminution in the number of inflammatory cells (p<0.05). An evident increase in the number of actin-positive cells was observed in the laser-treated wounds. Collagen deposition was less than expected in silica-treated wounds, and laser treatment contributed to its better differentiation and modulation in all irradiated groups. Thus, laser photobiomodulation was able to induce several modifications during the cutaneous healing process, especially in favoring newly-formed collagen fibers to be better organized and compactedly disposed.

J Photochem Photobiol B 2008 Jul 3

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18602833

Influence of low-level laser therapy on biomaterial osseointegration: a mini-review.

Obradovic RR, Kesic LG, Pesevska S

Department of Oral Medicine and Periodontology, Dental Clinic, Faculty of Medicine, University of Nis, Bul. Nikole Tesle 45/19, 18000, Nis, Serbia, dr.rada@yahoo.com.

The aim of this paper is to provide an overview of the available literature on low-level laser therapy (LLLT) and its influence on bone repair and the osseointegration of biomaterials. Extensive studies of alveolar bone repair, a common problem in periodontal therapy, have been conduced worldwide. The utility of LLLT in biomaterial osseointegration is still unanswered, due to lack of literature and poorly understood mechanisms. It is still difficult for one to compare studies about the action of LLLT on the osseointegration of biomaterials because the experimental models and duration of treatments are very distinct. However, it could be concluded that LLLT may offer advantages in terms of periodontal and bone functional recovery and biomaterial osseointegration.

Lasers Med Sci 2008 Jun 20

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18566853

Low-Intensity Laser Irradiation Improves the Mitochondrial Dysfunction of C2C12 Induced by Electrical Stimulation.

Xu X, Zhao X, Liu TC, Pan H

Laboratory of Laser Sports Medicine, College of Sports Sciences, South China Normal University, Guangzhou, China.

Abstract Objective: We investigated the effects of electrical stimulation and low-intensity laser (LIL) energy on the mitochondrial function of cultured C2C12 myotubes in order to find a dosage that could be used to improve the function of mitochondria, and then rehabilitate exercise-induced damage and fatigue. Background Data: Many other studies in the past demonstrated that LIL had a cytoprotective effect, and a recent study also found that LIL could reduce muscular fatigue during tetanic contractions in rats. Methods: Cultured C2C12 myotubes were subjected to electrical stimulation or/and LIL irradiation at various intensities. Reactive oxygen species (ROS) were detected with a fluorescent probe (DCFH-DA) and mitochondrial function was assessed with an MTT assay. Results: The results showed that electrical stimulation at 20 ms, 5 Hz, and 45 V for 75 min can induce mitochondrial dysfunction in cultured C2C12 myotubes. Electrical stimulation-induced mitochondrial dysfunction was improved, but degeneration occurred with LIL at doses of 0.33-8.22 and 11.22-14.16 J/cm(2), respectively, and these changes were markedly increased with LIL at 0.33 and 1.34 J/cm(2), respectively. Conclusions: We conclude that treatment of myotubes with the proper dosage of LIL irradiation significantly diminished production of ROS and restored mitochondrial function, and this may provide a foundation for the use of photobiomodulation to treat exercise-induced mitochondrial dysfunction or skeletal muscular fatigue.

Photomed Laser Surg 2008 Jun 26(3) 197-202

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18484910

Low-power laser irradiation activates Src tyrosine kinase through reactive oxygen species-mediated signaling pathway.

Zhang J, Xing D, Gao X

MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou, China.

Low-power laser therapy in medicine is widespread but the mechanisms are not fully understood. It has been suggested that low-power laser irradiation (LPLI) could induce photochemical reaction and activate several intracellular signaling pathways. Reactive oxygen species (ROS) are considered to be the key secondary messengers produced by LPLI. Here, we studied the signaling pathway mediated by ROS upon the stimulation of LPLI. Src tyrosine kinases are well-known targets of ROS and can be activated by oxidative events. Using a Src reporter based on fluorescence resonance energy transfer (FRET) and confocal laser scanning microscope, we visualized the dynamic Src activation in Hela cells immediately after LPLI. Moreover, Src activation by LPLI was in a dose-dependent manner. The increase of Src phosphorylation at Tyr416 was detected by Western blotting. In the presence of vitamin C, catalase alone, or the combination of catalase and superoxide dismutase (SOD), the activation of Src by LPLI is significantly abolished. In contrast, Go6983 loading, a PKC inhibitor, did not affect this response. Treatment of Hela cells with exogenous H(2)O(2) also resulted in a concentration-dependent activation of Src. These results demonstrated that it was ROS that mediated Src activation by LPLI. Cellular viability assay revealed that laser irradiation of low doses (</=25 J/cm(2)) promoted Hela cells viability while high doses impaired. Therefore, LPLI induces ROS-mediated Src activation which may play an important role in biostimulatory effect of LPLI. J. Cell. Physiol. (c) 2008 Wiley-Liss, Inc.

J Cell Physiol 2008 Jul 9

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18615581

Low-power laser treatment in patients with frozen shoulder: preliminary results.

Stergioulas  A

Laboratory of Health, Fitness, and Rehabilitation Management, Faculty of Humam Movement and Quality of Life, Peloponnese University, Sparta, Greece, and Peania Physical Therapy Center, Attica, Greece.

ABSTRACT Objective: In this study I sought to test the efficacy of low-power laser therapy (LLLT) in patients with frozen shoulder. Background Data: The use of low-level laser energy has been recommended for the management of a variety of musculoskeletal disorders. Materials and Methods: Sixty-three patients with frozen shoulder were randomly assigned into one of two groups. In the active laser group (n = 31), patients were treated with a 810-nm Ga-Al-As laser with a continuous output of 60 mW applied to eight points on the shoulder for 30 sec each, for a total dose of 1.8 J per point and 14.4 J per session. In the placebo group (n = 32), patients received placebo laser treatment. During 8 wk of treatment, the patients in each group received 12 sessions of laser or placebo, two sessions per week (for weeks 1-4), and one session per week (for weeks 5-8). Results: Relative to the placebo group, the active laser group had: (1) a significant decrease in overall, night, and activity pain scores at the end of 4 wk and 8 wk of treatment, and at the end of 8 wk additional follow-up (16 wk post-randomization); (2) a significant decrease in shoulder pain and disability index (SPADI) scores and Croft shoulder disability questionnaire scores at those same intervals; (3) a significant decrease in disability of arm, shoulder, and hand questionnaire (DASH) scores at the end of 8 wk of treatment, and at 16 wk posttreatment; and (4) a significant decrease in health-assessment questionnaire (HAQ) scores at the end of 4 wk and 8 wk of treatment. There was some improvement in range of motion, but this did not reach statistical significance. Conclusions: The results suggested that laser treatment was more effective in reducing pain and disability scores than placebo at the end of the treatment period, as well as at follow-up.

Photomed Laser Surg 2008 Apr 26(2) 99-105

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18341417

Effect of low-level laser therapy in the inflammatory response induced by Bothrops jararacussu snake venom.

Barbosa  AM, Villaverde  AB, Guimaraes-Souza  L, Ribeiro  W, Cogo  JC, Zamuner  SR

Laboratory of Inflammation, Institute of Research and Development, University of Vale do Paraiba, Av. Shishima Hifumi, 2911, Urbanova, CEP 12244-000, Sao Jose dos Campos, SP, Brazil.

This article reports the effect of low-level laser therapy (LLLT) on the edema formation and leukocyte influx caused by Bothrops jararacussu snake venom as an alternative treatment for Bothrops snakebites. The inflammatory reaction was induced by injection of 0.6mg/kg of B. jararacussu venom, in gastrocnemius muscle. Cell influx and edema were evaluated at 3 or 24h after venom injection. Mice were irradiated at the site of injury by a low-level laser (685nm) with a dose of 4.2J/cm(2). A therapy that combines LLLT and antivenom was also studied. B. jararacussu venom caused a significant edema formation 3 and 24h after its injection, and a prominent leukocyte infiltrate composed predominantly of neutrophils at 24h after venom inoculation. LLLT significantly reduced edema formation by 53% and 64% at 3 and 24h, respectively, and resulted in a reduction of neutrophils accumulation (P<0.05). The combined therapy showed to be more efficient than each therapy acting separately. In conclusion, LLLT significantly reduced the edema and leukocyte influx into the envenomed muscle, suggesting that LLLT should be considered as a potentially therapeutic approach for the treatment of the local effects of Bothrops species.

Toxicon 2008 Mar 10

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18439641

Comparison of 3 physical therapy modalities for acute pain in lumbar disc herniation measured by clinical evaluation and magnetic resonance imaging.

Unlu  Z, Tasci  S, Tarhan  S, Pabuscu  Y, Islak  S

Department of Physical Medicine and Rehabilitation, Medical Faculty, Celal Bayar University, Manisa, Turkey. zelihaunlu@yahoo.com

OBJECTIVE: This study measures and compares the outcome of traction, ultrasound, and low-power laser (LPL) therapies by using magnetic resonance imaging and clinical parameters in patients presenting with acute leg pain and low back pain caused by lumbar disc herniation (LDH). METHODS: A total of 60 patients were enrolled in this study and randomly assigned into 1 of 3 groups equally according to the therapies applied, either with traction, ultrasound, or LPL. Treatment consisted of 15 sessions over a period of 3 weeks. Magnetic resonance imaging examinations were done before and immediately after the treatment. Physical examination of the lumbar spine, severity of pain, functional disability by Roland Disability Questionnaire, and Modified Oswestry Disability Questionnaire were assessed at baseline, immediately after, and at 1 and 3 months after treatment. RESULTS: There were significant reductions in pain and disability scores between baseline and follow-up periods, but there was not a significant difference between the 3 treatment groups at any of the 4 interview times. There were significant reductions of size of the herniated mass on magnetic resonance imaging after treatment, but no differences between groups. CONCLUSIONS: This study showed that traction, ultrasound, and LPL therapies were all effective in the treatment of this group of patients with acute LDH. These results suggest that conservative measures such as traction, laser, and ultrasound treatments might have an important role in the treatment of acute LDH.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18394495

Efficacy of Low-Level Laser Therapy for Chronic Cutaneous Ulceration in Humans: A Review and Discussion.

Sobanko  JF, Alster  TS

Departments of Dermatology, Georgetown University Hospital and Washington Hospital Center, Washington, DC, USA.

Chronic wounds, particularly venous ulcerations, are notoriously difficult to heal. Because current therapies are variable in their ability to induce complete healing, there remains a need to develop adjunctive treatments that can improve or accelerate the healing process. The use of low-energy lasers to stimulate wound healing has been pursued over many decades in studies of varying quality. This form of treatment has had high appeal due to its novelty, relative ease, and low morbidity profile. The authors reviewed the available published literature on low-level laser technology in an attempt to provide cumulative insight on the effect of this treatment for wound healing.

Dermatol Surg 2008 Apr 22

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18430176

Biophysics behavior of acupuncture points irradiated with low energy lasers.

Moldovan  C

National Acupuncture & Homeopathy Centre, Bucharest, Romania.

This work describes the Low Energy Laser (LEL) coherent light interaction with the skin cover on acupuncture loci for the purpose of detecting and measuring the spatial and temporal alteration of the thermal, electric and optical properties of the LI4 (HEGU) acupoint, irradiated with a 685 nm, 30 mW, III.B Laser. Novel electrostatic imaging technique, an original Acupuncture 3-D Thermal and Electric Mapping Technique and an original Method for Laser-Skin Reflectance, were used in the study. The results indicate that the visible laser light, with low frequency and low power, specifically modify the 3-D pattern of the temperature, electric potential and electric impedance outline of an acupuncture point, meanwhile with a significant decrease of the laser reflectance index, all measured on a 27 apparently healthy subject lot (48 years mean age, 54% male), when comparing with a non-active, non-acupunctural skin area, placed on the volar side of the same hand. The biophysical method presented, combines in a complex way and reproducible the electro stasis exploration (bioelectric homeostasis), with cutaneous thermodynamic exploration and photo-optical exploration of the derma and provides information that can be appreciated in dynamics and compared depending on the exploration target.

Rom J Intern Med 2007 45(3) 281-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18333362

The combined treatment effects of therapeutic laser and exercise on tendon repair.

Ng  GY, Fung  DT

Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.

ABSTRACT Objective: In this study we investigated the effects of different intensities of therapeutic laser energy and running exercise, and their combined effects on the repair of Achilles tendons in rats. Materials and Methods: Thirty-six mature Sprague-Dawley rats that received surgical hemi-transection of their right Achilles tendon were tested. Three laser dosages (4 J/cm(2), 1 J/cm(2) and 0 J/cm(2)) and three running periods (30 min, 15 min, and 0 min) resulting in nine different dosage and time groups were studied with four rats in each group. The treatments were given on alternate days starting on day 5 post-injury. On day 22, the tendons were tested for load-relaxation, stiffness, and ultimate strength. Results: There was a significant effect of laser energy on normalized load-relaxation, the rats receiving 4 J/cm(2) had less load-relaxation than those receiving no laser treatment (p = 0.05). Results of stiffness testing revealed a significant effect, and rats that ran for 30 min had more stiffness than those that did not run (p = 0.015). For ultimate strength, due to a significant interaction (p = 0.05), the two factors were analyzed separately, and the results showed that for rats receiving no laser therapy, those that had run for 15 min and 30 min had more strength than those that did not run (p = 0.02 and 0.04, respectively). Conclusions: Both laser therapy and running were found to hasten Achilles tendon repair In general, the rats that received higher dosages of laser energy (4 J/cm(2)) and ran for longer periods (30 min) performed better than those that received lower dosages of laser energy and ran for shorter periods.

Photomed Laser Surg 2008 Apr 26(2) 137-41

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18341419

Bone repair following bone grafting hydroxyapatite guided bone regeneration and infra-red laser photobiomodulation: a histological study in a rodent model.

Pinheiro  AL, Martinez Gerbi  ME, de Assis Limeira  F Jr, Carneiro Ponzi  EA, Marques  AM, Carvalho  CM, de Carneiro Santos  R, Oliveira  PC, Noia  M, Ramalho  LM

Department of Propedeutica and Clinica Integrada, Laser Center, School of Dentistry, Federal University of Bahia, Salvador, BA, Brazil, albp@ufba.br.

The aim of the investigation was to assess histologically the effect of laser photobiomodulation (LPBM) on a repair of defects surgically created in the femurs of rats. Forty-five Wistar rats were divided into four groups: group I (control); group II (LPBM); group III (hydroxyapatite guided bone regeneration; HA GBR); group IV (HA GBR LPBM). The animals in the irradiated groups were subjected to the first irradiation immediately after surgery, and it was repeated every day for 2 weeks. The animals were killed 15 days, 21 days and 30 days after surgery. When the groups irradiated with implant and membrane were compared, it was observed that the repair of the defects submitted to LPBM was also processed faster, starting from the 15th day. At the 30th day, the level of repair of the defects was similar in the irradiated groups and those not irradiated. New bone formation was seen inside the cavity, probably by the osteoconduction of the implant, and, in the irradiated groups, this new bone formation was incremental. The present preliminary data seem to suggest that LPMB therapy might have a positive effect upon early wound healing of bone defects treated with a combination of HA and GBR.

Lasers Med Sci 2008 Apr 17

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18418643

Effect of laser radiation on production of reactive oxygen species in the blood of patients with chronic obstructive pulmonary disease.

Farkhutdinov  UR, Farkhutdinov  ShU

Department of Pulmonology, Clinical Hospital No. 21, Ufa.

RussiaThe effect of laser radiation on generation of reactive oxygen species in the whole blood from patients with chronic obstructive pulmonary disease was studied by in vitro recording of luminol-dependent chemiluminescence. Laser irradiation of the blood from patients with increased production of reactive oxygen species decreased the microbicidal potential of cells. In patients with low generation of reactive oxygen species and normal potential of cells, laser exposure increased production of O2 metabolites. Laser radiation had little effect on chemiluminescence of the blood in patients with low generation of reactive oxygen species and decreased functional activity of cells.

Bull Exp Biol Med 2007 Aug 144(2) 238-40

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18399290

A comparative study of the effects of laser photobiomodulation on the healing of third-degree burns: a histological study in rats.

Meirelles  GC, Santos  JN, Chagas  PO, Moura  AP, Pinheiro  AL

Laser Center, School of Dentistry, Department of Propedeutics and Integrated Clinics, Universidade Federal da Bahia, Salvador.

ABSTRACT Objective: The aim of this investigation was to compare by light microscopy the effects of laser photobiomodulation at wavelengths of 660 and 780 nm on third-degree burns in Wistar rats. Background Data: Burns are severe injuries that result in the loss of fluid and destruction of tissue, infection, and shock that may result in death. Laser energy has been suggested as an effective method to improve wound healing. Materials and Methods: Fifty-five animals were used in this study. A third-degree burn measuring 1.5 x 1.5 cm was created on the dorsum of each animal. The animals were divided into three subgroups according the type of laser photobiomodulation they received (wavelength of 660 or 780 nm, 35 mW, theta = 2 mm, and 20 J/cm(2)). In the animals receiving treatment, it was begun immediately post-burn at four points around the burn (5 J/cm(2)) and repeated at 24-h intervals for 21 d. The animals were humanely killed after 3, 5, 7, 14, and 21 d by an intraperitoneal overdose of general anesthetic. The specimens were routinely cut and stained, and then were analyzed by light microscopy. Results: The results showed more deposition of collagen fibers, larger amounts of granulation tissue, less edema, a more vigorous inflammatory reaction, and increased revascularization on all laser-treated animals. These features were more evident at early stages when the 660-nm laser was used, and were more evident throughout the experimental period for the animals receiving 780-nm laser therapy. Conclusion: We concluded that laser photobiomodulation using both wavelengths improved healing of third-degree burns on Wistar rats.

Photomed Laser Surg 2008 Apr 26(2) 159-66

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18338966

Infrared Laser Light Further Improves Bone Healing When Associated with Bone Morphogenetic Proteins and Guided Bone Regeneration: An in Vivo Study in a Rodent Model.

Pinheiro  AL, Gerbi  ME, Ponzi  EA, Ramalho  LM, Marques  AM, Carvalho  CM, Santos  RD, Oliveira  PC, Noia  M

Laser Center, School of Dentistry, Department of Propedeutica and Clinica Integrada, Universidade Federal da Bahia, Salvador, and Instituto de Pequisa e Desenvolvimento (IPD), Vale do Paraiba University, Sao Jose dos Campos, Salvador, Brazil.

ABSTRACT Objective: This study assessed histologically the effect of laser photobiomodulation on the repair of surgical defects created in the femurs of Wistar rats treated or not treated with bone morphogenetic proteins (BMPs) and organic bovine bone graft. Background Data: This paper is part of an ongoing series of works in which biomaterials and/or guided bone regeneration (GBR) are used in association with laser photobiomodulation. Several previous reports from our group have shown that the use of laser photobiomodulation improves the treatment of bone defects. Materials and Methods: Forty-eight adult male Wistar rats were divided into four randomized groups: group 1 (controls, n = 12); group 2 (laser photobiomodulation, n = 12); group 3 (BMPs + organic bovine bone graft + GBR, n = 12); and group 4 (BMPs + organic bovine bone graft + GBR + laser photobiomodulation, n = 12). The irradiated groups received seven irradiations every 48 h, the first immediately after the surgical procedure. Laser photobiomodulation (830 nm, 40 mW, CW, phi approximately 0.6 mm) consisted of a total of 16 J/cm(2) per session at four points (4 J/cm(2) each) equally spaced around the periphery of the defect. The animals were sacrificed after 15, 21, and 30 d, and the specimens were routinely embedded in wax and stained with hematoxylin and eosin and Sirius red stains and analyzed under light microscopy. Results: The results showed histological evidence of increased deposition of collagen fibers (at 15 and 21 d), as well as an increased amount of well-organized bone trabeculi at the end of the experimental period (30 d) in irradiated animals compared to non-irradiated controls. Conclusion: We concluded that the use of laser photobiomodulation in association with BMPs, organic bovine bone grafts, and GBR increases the positive biomodulating effects of laser energy.

Photomed Laser Surg 2008 Mar 16

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18341420

Initial effects of low-level laser therapy on growth and differentiation of human osteoblast-like cells.

Stein  E, Koehn  J, Sutter  W, Wendtlandt  G, Wanschitz  F, Thurnher  D, Baghestanian  M, Turhani  D

Department of Cranio-Maxillofacial and Oral Surgery, Medical University of Vienna, Austria.

Low-level laser therapy is a clinically well established tool for enhancement of wound healing. In vitro studies have also shown that low level laser therapy has a biostimulatory effect on cells of different origin. The aim of this in vitro study was to investigate the initial effect of low-level laser therapy on growth and differentiation of human osteoblast-like cells. SaOS-2 cells were irradiated with laser doses of 1 J/cm(2) and 2 J/cm(2) using a diode laser with 670 nm wave length and an output power of 400 mW. Untreated cells were used as controls. At 24 h, 48 h and 72 h post irradiation, cells were collected and assayed for viability of attached cells and alkaline phosphatase specific activity. In addition, mRNA expression levels of osteopontin and collagen type I were assessed using semi-quantitative RT-PCR. Over the observation period, cell viability, alkaline phosphatase activity and the expression of osteopontin and collagen type I mRNA were slightly enhanced in cells irradiated with 1 J/cm(2) compared with untreated control cells. Increasing the laser dose to 2 J/cm(2) reduced cell viability during the first 48 h and resulted in persistently lower alkaline phosphatase activity compared with the other two groups. The expression of osteopontin and collagen type I mRNA slightly decreased with time in untreated controls and cells irradiated with 1 J/cm(2), but their expression was increased by treatment with 2 J/cm(2) after 72 h. These results indicate that low-level laser therapy has a biostimulatory effect on human osteoblast-like cells during the first 72 h after irradiation. Further studies are needed to determine the potential of low-level laser therapy as new treatment concept in bone regeneration.

Wien Klin Wochenschr 2008 Feb 120(3-4) 112-117

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18322773

Low-energy helium-neon laser therapy induces repigmentation and improves the abnormalities of cutaneous microcirculation in segmental-type vitiligo lesions.

Wu  CS, Hu  SC, Lan  CC, Chen  GS, Chuo  WH, Yu  HS

Department of Dermatology, Kaohsiung Medical University Hospital, and Department of Dermatology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.

Segmental vitiligo (SV) is a special form of vitiligo occurring in a dermatomal distribution, and an abnormality involving the sympathetic nerves supplying the affected dermatome is known to underlie this disorder. Previously, we have shown that SV is associated with an abnormal increase in cutaneous blood flow and adrenoceptor responses in the affected areas. Since SV is resistant to conventional forms of therapy, its management represents a challenge for dermatologists. Low energy helium-neon lasers (He-Ne laser, wavelength 632.8 nm) have been employed as a therapeutic instrument in many clinical situations, including vitiligo management and repair of nerve injury. The purpose of this study was to evaluate the effectiveness and safety of He-Ne lasers in treating SV, and determine their effects on the repair of sympathetic nerve dysfunction. Forty patients with stable-stage SV on the head and/or neck were enrolled in this study. He-Ne laser irradiation was administered locally at 3.0 J/cm2 with point stimulation once or twice weekly. Cutaneous microcirculatory assessments in six SV patients were performed using a laser Doppler flowmeter. The sympathetic adrenoceptor response of cutaneous microcirculation was determined by measuring cutaneous blood flow before, during and after iontophoresis with sympathomimetic drugs (phenylephrine, clonidine and propranolol). All measurements of microcirculation obtained at SV lesions were simultaneously compared with contralateral normal skin, both before and after He-Ne laser treatment. After an average of 17 treatment sessions, initial repigmentation was noticed in the majority of patients. Marked repigmentation (> 50%) was observed in 60% of patients with successive treatments. Cutaneous blood flow was significantly higher at SV lesions compared with contralateral skin, but this was normalized after He-Ne laser treatment. In addition, the abnormal decrease in cutaneous blood flow in response to clonidine was improved by He-Ne laser therapy. Our study showed that He-Ne laser therapy is an effective treatment for SV by normalizing dysfunctions of cutaneous blood flow and adrenoceptor responses in SV patients. Thus, the beneficial effects of He-Ne laser therapy may be mediated in part by a reparative effect on sympathetic nerve dysfunction.

Kaohsiung J Med Sci 2008 Apr 24(4) 180-9

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18424354

Low Level Laser Therapy (LLLT) Decreases Pulmonary Microvascular Leakage, Neutrophil Influx and IL-1beta Levels in Airway and Lung from Rat Subjected to LPS-Induced Inflammation.

Aimbire  F, Ligeiro de Oliveira  AP, Albertini  R, Correa  JC, Ladeira de Campos  CB, Lyon  JP, Silva  JA Jr, Costa  MS

Instituto de Pesquisa & Desenvolvimento-IP&D, Universidade do Vale do Paraiba-UNIVAP, Av. Shishima Hifumi, 2911, CEP: 12244-000, Sao Jose dos Campos, Sao Paulo

BrazilBACKGROUND AND OBJECTIVE: Low level laser therapy (LLLT) is a known anti-inflammatory therapy. Herein we studied the effect of LLLT on lung permeability and the IL-1beta level in LPS-induced pulmonary inflammation. STUDY DESIGN/METHODOLOGY: Rats were divided into 12 groups (n = 7 for each group). Lung permeability was measured by quantifying extravasated albumin concentration in lung homogenate, inflammatory cells influx was determined by myeloperoxidase activity, IL-1beta in BAL was determined by ELISA and IL-1beta mRNA expression in trachea was evaluated by RT-PCR. The rats were irradiated on the skin over the upper bronchus at the site of tracheotomy after LPS. RESULTS: LLLT attenuated lung permeability. In addition, there was reduced neutrophil influx, myeloperoxidase activity and both IL-1beta in BAL and IL-1beta mRNA expression in trachea obtained from animals subjected to LPS-induced inflammation. CONCLUSION: LLLT reduced the lung permeability by a mechanism in which the IL-1beta seems to have an important role.

Inflammation 2008 Jun 31(3) 189-97

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18421573

Low-level laser therapy decreases levels of lung neutrophils anti-apoptotic factors by a NF-kappaB dependent mechanism.

Aimbire  F, Santos  FV, Albertini  R, Castro-Faria-Neto  HC, Mittmann  J, Pacheco-Soares  C

Institute of Research and Development – IP&D – UNIVAP. Av. Shishima Hifumi, 2911, CEP: 12244-000, Sao Jose dos Campos – SP, Brazil.

BACKGROUND AND OBJECTIVE: Low-level laser therapy (LLLT) is a known modulator of inflammatory process. Herein we studied the effect of 660 nm diode laser on mRNA levels of neutrophils anti-apoptotic factors in lipopolysaccharide (LPS)-induced lung inflammation. STUDY DESIGN/METHODOLOGY: Mice were divided into 8 groups (n=7 for each group) and irradiated with energy dosage of 7.5 J/cm(2). The Bcl-xL and A1 mRNA levels in neutrophils were evaluated by Real Time-PCR (RT-PCR). The animals were irradiated after exposure time of LPS. RESULTS: LLLT and an inhibitor of NF-kappaB nuclear translocation (BMS 205820) attenuated the mRNA levels of Bcl-xL and A1 mRNA in lung neutrophils obtained from mice subjected to LPS-induced inflammation. CONCLUSION: LLLT reduced the levels of anti-apoptotic factors in LPS inflamed mice lung neutrophils by an action mechanism in which the NF-kappaB seems to be involved.

Int Immunopharmacol 2008 Apr 8(4) 603-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18328453

Clinical Evaluation of a 1,450-nm Diode Laser as Adjunctive Treatment for Refractory Facial Acne Vulgaris.

Astner  S, Tsao  SS

Department of Dermatology, Wellman Center of Photomedicine, Massachusetts Generasl Hospital, Boston, MA, USA.

BACKGROUND Despite aggressive multitreatment medical acne regimens, many patients demonstrate modest benefit. The 1,450-nm diode laser has been shown to improve acne in a study setting. OBJECTIVE Herein we evaluate the use of this laser as an adjunctive tool in the management of refractory facial acne vulgaris. MATERIALS AND METHODS Thirteen patients were treated. Lesion counts, clinical evaluation, and digital photography were performed at baseline and at all follow-up visits. Patients received an average of three treatments. Acne severity index and patient satisfaction were assessed. Patients continued their medical acne regimen where applicable. RESULTS Mean total lesion and inflammatory lesion counts decreased from 66 +/- 14 and 23 +/- 5 at baseline to 34 +/- 12.9 and 14 +/- 7 after three treatments (p<.05). Side effects were mild, including erythema lasting up to 24 hours. CONCLUSION The 1,450-nm diode laser provides moderate improvement of refractory acne vulgaris. Our findings support the use of this device as an adjunctive treatment for acne management.

Dermatol Surg 2008 May 6

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18462424

Low-level laser therapy (670 nm) on viability of random skin flap in rats.

Bossini  PS, Fangel  R, Habenschus  RM, Renno  AC, Benze  B, Zuanon  JA, Neto  CB, Parizotto  NA

Department of Physiotherapy, Federal University of Sao Carlos, Sao Carlos, SP, Brazil.

This study investigated the effects of 670 nm laser, at different fluences, on the viability of skin flap in rats. One hundred male animals were used. The animals were divided into control group; group treated with 3 J/cm(2); group treated with 6 J/cm(2); group treated with 12 J/cm(2) and group treated with 24 J/cm(2). The skin flap was made on the backs of all animals studied, with a plastic sheet interposed between the flap and the donor site. Laser irradiation was done immediately after the surgery and on days 1, 2, 3 and 4 after surgery. The percentage of necrosis of the flap was calculated at the 7th postoperative day. Additionally, a sample of each flap was collected to enable us to count the blood vessels. Treated animals showed a statistically significant smaller area of necrosis than did the control group. The necrosis in the treated groups was 41.82% (group 2), 36.51% (group 3), 29.45% (group 4) and 20.37% (group 5). We also demonstrated that laser irradiation at 670 nm, at all doses used, had a stimulatory effect on angiogenesis. Our study showed that the 670 nm laser was efficient to increase the viability of the skin flap, at all fluences used, with a tendency of reaching better results at higher doses.

Lasers Med Sci 2008 Mar 20

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18351431

Histological and clinical studies on the effects of low to medium level infrared light therapy on human and mouse skin.

Kameyama  K

Aoyama Dermatology Clinic, Tokyo, Japan

BACKGROUND AND OBJECTIVE: Deep heating or denaturation of collagen has been reported to be necessary for nonablative skin rejuvenation. The purpose of this study was to examine whether thermally damaged collagen is an indispensable factor to increase the amount of collagen in vivo. Epidermal and dermal responses to infrared light therapy using a Titan source were examined with the aim of correlating histological and clinical responses in human and amelanotic mouse skin. STUDY DESIGN/MATERIALS AND METHODS: Ten, 20, or 30 J/cm2 infrared light were irradiated on the human subject’s skin (thigh), while 5, 10, 20, or 30 J/cm2 were used on amelanotic mouse skin. Biopsies were taken and analyzed using hematoxylin and eosin (H&E) and Elastica von Gieson stain. RESULTS: Ten or 20 J/cm2 infrared light increased the amount of both collagen and elastin in all layers of the dermis without denaturing the collagen in human skin. A higher dose of 30 J/cm2 also increased the amount of collagen and elastin, but denatured the collagen in human skin. (In addition to the thigh, 2 treatments of 10 J/cm2 infrared light improved skin toning and texture on the subject’s face). In mouse skin, 5 or 10 J/cm2 remarkably increased the amount of both collagen and elastin, and of epidermal cells. Twenty or 30 J/cm increased the amount of collagen and elastin and the number of keratinocytes, but caused some vacuolated degeneration of keratinocytes. The presence of denatured collagen was not evident due to the high density of collagen. CONCLUSIONS: This study shows that the denaturation of collagen is not required to increase the amounts of collagen or elastin in vivo in human skin. The activation of the mitochondria as well as the denaturation of collagen may play important roles in infrared phototherapy.

J Drugs Dermatol 2008 Mar 7(3) 230-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18380204

Laser in the treatment of hypertrophic burn scars.

Kawecki  M, Bernad-Wisniewska  T, Sakiel  S, Nowak  M, Andriessen  A

Burn Center, Jana Pawla II 2, 41-100, Siemianowice Slaskie, Poland.

This prospective study looked at the outcome of laser (light amplification by stimulated emission of radiation) treatment for hypertrophic scarring. Dermatrade mark K laser (a set of combined lasers erbium:yttrium aluminium garnet/carbon dioxide, qualified as a class IV laser) was used. Between 21 June 2000 and 19 November 2002, at the Siemianowice Burn Center, Poland, 592 interventions, using laser, were performed on N= 327 patients (220 women and 107 men, aged between 3 and 80 years). The majority of cases [N= 223 (68.9%)] were patients with post-burn hypertrophic scars, and 104 cases (31.8%) had various types of hypertrophic scars. Evaluation took place using an adapted Vancouver Scar Scale and digital photographs as well as the patient’s opinion. It was noted that after laser treatment, satisfactory results were achieved in 72% of cases. The scars had become less red (192/327 scored no redness at the end of the study versus 92/327 upon initial), less raised (272/327 scored a flat scar versus 72/327 upon initial) and demonstrated an improved viscoelasticity (192/327 scored a soft skin versus 62/327 upon initial). Laser treatment did not improve contractures in post-burn hypertrophic scars. Results were not confirmed using objective measurement tools, as these were not available to us.

Int Wound J 2008 Mar 5(1) 87-97

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18336382

Acne phototherapy with a 1450-nm diode laser: an open study.

Konishi  N, Endo  H, Oiso  N, Kawara  S, Kawada  A

Department of Dermatology, Kinki University School of Medicine Ohno-Higashi 377-2, Osaka-Sayama city, Osaka 589-8511, Japan.

The purpose of this study was to investigate the efficacy of phototherapy with a newly-developed 1450-nm diode laser in patients with mild to moderate acne. An open study was performed in acne patients who were treated up to five times with a two week interval. Acne lesions were reduced by 63%. Only one patient discontinued treatment due to vesicle formation as an adverse effect. Phototherapy using this diode laser source was effective and well tolerated in acne patients, suggesting that this phototherapy may be a new modality for the treatment of acne.

Ther Clin Risk Manag 2007 Mar 3(1) 205-9

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18360628

Handheld LED array device in the treatment of acne vulgaris.

Sadick  NS

Weill Medical College of Cornell University, Department of Dermatology, New York, NY, USA

The successful treatment of acne still remains problematic. Conventional therapies often prove inconsistent with unacceptable side effects and recurrence rates, leading to patient noncompliance. A thermal phototherapy treatment using a combination of blue light and red light has recently attracted much attention and seems to offer an effective alternative. The objective of this study was to evaluate the efficacy of blue light (415 nm) in combination with red light (633 nm) in the reduction of inflammatory lesions on the face of subjects (n=21) with mild to moderate acne vulgaris after a course of 8 20-minute (blue) or 30-minute (red) alternated light treatments, self-administered by a handheld unit over a period of 4 weeks. Lesion counts progressively reduced throughout the 4-week light therapy period and continued to reduce up to 8 weeks posttherapy, with a final average reduction of 69% seen 8 weeks after the treatment course (P>.001). This pattern is similar to previously reported studies.

J Drugs Dermatol 2008 Apr 7(4) 347-50

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18459515

Literature news.

Sardella  A

Dipartimento di Medicina, Chirurgia e Odontoiatria, Via Beldiletto 1, 20142 Milano, Italy.

AIM: To evaluate the clinical effects of laser therapy on the prevention and reduction of oral mucositis in patients who underwent hematopoietic stem cell transplantation (HSCT).Patients and methods: From January 2003 to September 2004, 24 patients received prophylactic laser therapy (L+ group). The applications started from the beginning of the conditioning regimen up to day +2. The oral assessment was performed daily until day +30. This group was compared with historical controls, namely 25 patients, who did not receive laser therapy (L? group). RESULTS: All patients developed some grade of mucositis. However, the L? group presented initial mucositis by 4.36 days, whereas the L+ group presented it in 6.12 days (P = 0.01). The maximum mucositis occurred between day +2 and day +6 with healing by day +25 in the L? group and between day +2 and day +7 with healing by day +14 for the L+ group (P = 0.84). Laser therapy also reduced the time of oral pain from 5.64 to 2.45 days (P = 0.04), and decreased the consumption of morphine (P = 0.07). CONCLUSION: This study suggests that laser therapy can be useful in oral mucositis to HSCT patients and improve the patient’s quality of life. However, controlled randomized trials should be performed to confirm the real efficacy of laser therapy.

Minerva Stomatol 2008 Jan-Feb 57(1-2) 77-8

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18427375

Here is my selection for the April 2008 Photomedicine and Laser Surgery

The Impact of low power laser in the treatment of conditioning-induced oral mucositis: a report of 11 clinical cases and their review.

Antunes HS, Ferreira EM, de Matos VD, Pinheiro CT, Ferreira CG

Serviso de Pesquisa Clinica, Instituto Nacional de Cancer, Rua Andre Cavalcante, Rio de Janeiro, Brasil. hspindola@inca.gov.br

We have investigated the clinical effects of low power laser therapy (LPLT) on the treatment of conditioning-induced oral mucositis (OM) in patients submitted to hematopoietic stem cell transplantation (HSCT). The evaluation of OM was done using the Oral Mucositis Assessment Scale (OMAS) and World Health Organization (WHO) scale. In the context of a randomized placebo-controlled trial with 38 patients for the evaluation of preventive LPLT, eleven individuals were submitted to allogeneic (AL) HSCT and developed oral mucositis grade 4 (WHO) or a total area of OM of 12 cm (OMAS) and due to that were treated with LPLT with the purpose of symptom relief. The irradiation used was a diode InGaAlP, emitting light at 660 nm, 50 mW and 8 J/cm(2) measured at the end of fiber optic with 0.196 cm(2) of section area during the treatment. The tip of the laser device touched the oral mucosa and patients recovered on average 6 days (3-12 days) from the beginning of the laser application. Our results have indicated that the use of LPLT in HSCT patients is a powerful instrument in the treatment of overt OM and is now a standard procedure in this group of patients in our hospital.

Med Oral Patol Oral Cir Bucal 2008 Mar 13(3) E189-92

http://www.ncbi.nlm.NIH.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18305441

Efficacy of He-Ne Laser in the prevention and treatment of radiotherapy-induced oral mucositis in oral cancer patients.

Arora H, Pai KM, Maiya A, Vidyasagar MS, Rajeev A

Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Manipal, Karnatka, India. drarora@gmail.com

OBJECTIVE: The objective of this study was to evaluate the efficacy of low-level lasers for the prevention and treatment of radiotherapy-induced oral mucositis in oral cancer patients. MATERIAL AND METHODS: Twenty-four hospitalized patients with oral cancer, scheduled to undergo radiotherapy at KMC, Manipal, were enrolled in the present study and assigned to laser (Group I)/control group (Group II). They were treated using He-Ne laser (lambda = 632.8nm, output = 10 mW and energy density = 1.8 J/cm(2)). Patients were subjected to treatment using laser scanner for 8 days and subsequently were treated using laser probe at 6 anatomic sites in the oral cavity for 5 minutes each. The patients were evaluated on each day of treatment for pain severity (NRS), functional impairment (FIS), and oral mucositis (RTOG) and were followed until the end of cancer treatment. Statistical analysis was done using SPSS version 10. RESULTS: Laser therapy applied prophylactically during radiotherapy can reduce the severity of oral mucositis, severity of pain, and functional impairment.

Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008 Feb 105(2) 180-6, 186.e1

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18230388

Fiber-coupled light-emitting diode for localized photostimulation of neurons expressing channelrhodopsin-2.

Campagnola L, Wang H, Zylka MJ

Department of Cell and Molecular Physiology, 5109A NRB, CB #7545, 115 Mason Farm Road, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7545, United States.

Channelrhodopsin-2 (ChR2) is a blue-light-gated ion channel that can be used to stimulate genetically defined neurons reproducibly, rapidly and non-invasively. Existing approaches for delivering light to cells expressing ChR2 rely upon microscopes, lasers, arc lamps and shutters, all of which are relatively expensive and are not readily scalable for use on more than one brain region or animal at a time. In this paper, we describe an inexpensive method for delivering blue light locally and with millisecond precision to cells expressing ChR2. We accomplished this by coupling the light from a high-intensity blue light-emitting diode (LED; XLamp XR-E from CREE) into an optical fiber. When positioned in proximity to ChR2-expressing HEK293 cells, this fiber-coupled LED provided localized illumination of up to 32mW/mm(2) and generated ChR2 photocurrents as efficiently as wide-field mercury arc lamp illumination. This fiber-coupled LED was also used to photostimulate action potentials in ChR2-expressing dorsal root ganglia (DRG) sensory neurons. LED light power and pulse frequency were controlled with an inexpensive, custom-built amplifier circuit. This scalable fiber-coupled LED system can be used to deliver light independent of the microscope objective and could, in principle, deliver light in parallel to multiple brain regions or to multiple genetically engineered animals.

J Neurosci Methods 2008 Mar 30 169(1) 27-33

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18187202

Select modalities.

Canapp DA

Veterinary Orthopedic and Sports Medicine Group, Ellicott City, MD 21042, USA. dcanapp@vetsportsmedicine.com

Physical rehabilitation modalities such as therapeutic ultrasound (TU), transcutaneous electrical neuromuscular stimulation (TENS), neuromuscular electrical stimulation (NMES), cold or low-level laser therapy (LLLT), and pulsed magnetic field therapy (PMF) can all, when used properly, assist in treating orthopedic injuries, neurological conditions, and chronic conditions brought about by normal aging in our small animal companions. TU uses sound waves to produce both thermal and nonthermal effects that aid in tissue healing, repair, and function. TENS uses different frequencies of electrical current to decrease pain and inflammation. NMES also uses an electrical current to stimulate muscle contraction to assist in normal neuromuscular function in postorthopedic and neurological injuries. LLLT uses light energy to reduce pain, decrease inflammation, and stimulate healing at a cellular level. PMF uses magnetic field to stimulate normal cellular ion exchange and oxygen utilization and promote generalized healing of tissues. These modalities are discussed in detail covering mechanism of action, parameters, settings, and indications/contraindications of use in our small animals. Although these modalities are important in the physical rehabilitation of small animals, they need to be incorporated with a proper diagnosis, manual therapy, and home exercise program into a specific and individualized patient treatment protocol.

Clin Tech Small Anim Pract 2007 Nov 22(4) 160-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18198784

Light therapy and advanced wound care on a neuropathic plantar ulcer on a charcot foot.

Cordrey R

Renee Cordrey, PT, MSPT, MPH, CWS, St. Francis Medical Center, Impatient Wound Care, Lynwood, California.

J Wound Ostomy Continence Nurs 2008 Jan-Feb 35(1) 116-7

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18199949

Clinical Effect of CO(2) Laser in Reducing Pain in Orthodontics.

Fujiyama K, Deguchi T, Murakami T, Fujii A, Kushima K, Takano-Yamamoto T

Objective: To test the hypothesis that there is no difference in the pain associated with orthodontic force application after the application of local CO(2) laser irradiation to the teeth involved. Materials and Methods: Separation modules were placed at the distal contacts of the maxillary first molars in 90 patients in this single-blinded study. In 60 of these patients (42 females and 18 males; mean age = 19.22 years) this was immediately followed by laser therapy. The other 30 patients (18 females and 12 males; mean age = 18.8 years) did not receive active laser irradiation. Patients were then instructed to rate their levels of pain on a visual analog scale over time, and the amount of tooth movement was analyzed. Results: Significant pain reductions were observed with laser treatment from immediately after insertion of separators through day 4, but no differences from the nonirradiated control side were noted thereafter. No significant difference was noted in the amount of tooth movement between the irradiated and nonirradiated group. Conclusions: The hypothesis was rejected. The results suggest that local CO(2) laser irradiation will reduce pain associated with orthodontic force application without interfering with the tooth movement.

Angle Orthod 2008 Mar 78(2) 299-303

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18251609

Treatment of neck pain: noninvasive interventions: results of the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders.

Hurwitz EL, Carragee EJ, van der Velde G, Carroll LJ, Nordin M, Guzman J, Peloso PM, Holm LW, Cote P, Hogg-Johnson S, Cassidy JD, Haldeman S

Department of Public Health Sciences, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI 96822, USA. ehurwitz@aii.edu

STUDY DESIGN: Best evidence synthesis. OBJECTIVE: To identify, critically appraise, and synthesize literature from 1980 through 2006 on noninvasive interventions for neck pain and its associated disorders. SUMMARY OF BACKGROUND DATA: No comprehensive systematic literature reviews have been published on interventions for neck pain and its associated disorders in the past decade. METHODS: We systematically searched Medline and screened for relevance literature published from 1980 through 2006 on the use, effectiveness, and safety of noninvasive interventions for neck pain and associated disorders. Consensus decisions were made about the scientific merit of each article; those judged to have adequate internal validity were included in our best evidence synthesis. RESULTS: Of the 359 invasive and noninvasive intervention articles deemed relevant, 170 (47%) were accepted as scientifically admissible, and 139 of these related to noninvasive interventions (including health care utilization, costs, and safety). For whiplash-associated disorders, there is evidence that educational videos, mobilization, and exercises appear more beneficial than usual care or physical modalities. For other neck pain, the evidence suggests that manual and supervised exercise interventions, low-level laser therapy, and perhaps acupuncture are more effective than no treatment, sham, or alternative interventions; however, none of the active treatments was clearly superior to any other in either the short- or long-term. For both whiplash-associated disorders and other neck pain without radicular symptoms, interventions that focused on regaining function as soon as possible are relatively more effective than interventions that do not have such a focus. CONCLUSION: Our best evidence synthesis suggests that therapies involving manual therapy and exercise are more effective than alternative strategies for patients with neck pain; this was also true of therapies which include educational interventions addressing self-efficacy. Future efforts should focus on the study of noninvasive interventions for patients with radicular symptoms and on the design and evaluation of neck pain prevention strategies.

Spine 2008 Feb 15 33(4 Suppl) S123-52

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18204386

A randomized double-blind comparative study of Biolight light therapy following surgical extraction of impacted lower third molars.

Kashani H, Kanagaraja S, Kahnberg KE

Department of Oral & Maxillofacial Surgery, NAL Medical Center Hospital, Trollhattan, Sweden. hossein.kashani@vgregion.se

Monochromatic light has been used in many studies and indicated that phototherapy might be effective in the treatment of pain relief. The aim of this investigation was to evaluate the efficacy of monochromatic light phototherapy on patients who had undergone impacted third molar surgery. Sixty adult patients were included in the study. The patients were divided into 2 groups; the Biolight therapy group and the placebo therapy group. All the subjects received phototherapy 6 minutes preoperative and 10 minutes postoperative.They were examined 3 and 7 days after surgery to evaluate postoperative pain and wound healing. One patient was excluded from the study due to extraction of the third molar in maxilla. All the patients received a questionnaire to answer regarding pain and the number of pain killers consumed.The results from this study showed that Phototherapy using monochromatic light Biolight therapy had no significant differences compared to the placebo group.

Swed Dent J 2007 31(4) 165-70

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18220219

[Complex therapy of chronic bacterial prostatitis using matrix-urologist laser therapy]

Kozdoba AS, Popov SV, Ivanchenko LP

A total of 49 patients with chronic bacterial prostatitis (CBP) were divided into two groups matched by age, the disease duration and severity of clinical symptoms. The study group consisted of 27 CBP patients who received antimicrobial therapy with sparfloxacine (fluoroquinolone of the third generation) and impact of vibromagnetolaser head of the VMLG-10 unit. The control group consisted of 22 CBP patients given antimicrobial therapy with sparfloxacine and 10 sessions of manual massage. Eradication of the bacteria was achieved in 25 (92%) patients of the study group and 19 (86.4%) patients of the control group. The treatment significantly attenuated the symptoms, normalized leukocyte count in the prostatic secretion, reduced size of the gland. Thus, application of the vibromagnetolaser head VMLG-10 of the laser therapy unit Matrix-urologist raises treatment efficacy in CBP patients.

Urologiia 2007 Sep-Oct (5) 51, 53-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18257156

Low-level laser therapy modulates cyclo-oxygenase-2 expression during bone repair in rats.

Matsumoto MA, Ferino RV, Monteleone GF, Ribeiro DA

Department of Oral Maxillofacial Surgery, School of Dentistry, University of the Sacred Heart (USC), Bauru, SP, Brazil.

The goal of this study was to analyze the role of cyclo-oxygenase-2 following bone repair in rats submitted to low-level laser therapy. A total of 48 rats underwent surgery to inflict bone defects in their tibias having been randomly distributed into two groups: negative control and laser exposed group, i.e., the animals were treated with low-level laser therapy by means of gallium arsenide laser at 16 J/cm(2). The animals were killed after 48 h, 7 days, 14 days, or 21 days. The tibias were removed for morphological, morphometric, and immunohistochemistry analysis for cyclo-oxygenase-2. Statistical significant differences (P < 0.05) were observed in the quality of bone repair and quantity of formed bone between groups 14 days after surgery in the laser exposed group. In the same way, cyclo-oxygenase-2 immunoreactivity was more intense in bone cells for intermediate periods evaluated in this group. Taken together, such results suggest that low-level laser therapy is able to improve bone repair in the tibia of rats after 14 days of surgery as a result of an up-regulation for cyclo-oxygenase-2 expression in bone cells.

Lasers Med Sci 2008 Feb 29

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18309458

[Patients with tuberculosis associated with chronic non-specific lung diseases]

Nikolaieva OD

159 patients have been observed to assess the efficiency of laseropuncture use in a complex treatment of patients with lung tuberculosis and chronic bronchitis. Disbalance in renal meridian (R), urinary bladder (V) and insufficiency of the energy in colon meridian (60.3%) were observed in patients with tuberculosis associated with chronic bronchitis. Medium deviations of electro-skin conductivity from the physiological gape in meridians of GI, IG, F, V, R in patients with tuberculosis associated with chronic bronchitis considerably differ from those data obtained from patients with only tuberculosis. Obtained data testify more severe disorders of energy balance in meridians of patients having except tuberculosis other associated diseases. Medium parameters of deviations from the physiological gape considerably decrease after the course of laseropuncture compared with those patients treated traditionally. Improve of the course of the chronic bronchitis was noted in patients who underwent laseropuncture.

Lik Sprava 2007 Apr-May (3) 42-6

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18271179

The short-term efficacy of laser, brace, and ultrasound treatment in lateral epicondylitis: a prospective, randomized, controlled trial.

Oken O, Kahraman Y, Ayhan F, Canpolat S, Yorgancioglu ZR, Oken OF

Ankara Education and Research Hospital, Department of Physical Medicine and Rehabilitation, Division of Hand Rehabilitation, Ankara, Turkey. okenoznur@yahoo.com

The aims of this study were to evaluate the effects of low-level laser therapy (LLLT) and to compare these with the effects of brace or ultrasound (US) treatment in tennis elbow. The study design used was a prospective and randomized, controlled, single-blind trial. Fifty-eight outpatients with lateral epicondylitis (9 men, 49 women) were included in the trial. The patients were divided into three groups: 1) brace group-brace plus exercise, 2) ultrasound group-US plus exercise, and 3) laser group-LLLT plus exercise. Patients in the brace group used a lateral counterforce brace for three weeks, US plus hot pack in the ultrasound group, and laser plus hot pack in the LLLT group. In addition, all patients were given progressive stretching and strengthening exercise programs. Grip strength and pain severity were evaluated with visual analog scale (VAS) at baseline, at the second week of treatment, and at the sixth week of treatment. VAS improved significantly in all groups after the treatment and in the ultrasound and laser groups at the sixth week (p<0.05). Grip strength of the affected hand increased only in the laser group after treatment, but was not changed at the sixth week. There were no significant differences between the groups on VAS and grip strength at baseline and at follow-up assessments. The results show that, in patients with lateral epicondylitis, a brace has a shorter beneficial effect than US and laser therapy in reducing pain, and that laser therapy is more effective than the brace and US treatment in improving grip strength.

J Hand Ther 2008 Jan-Mar 21(1) 63-7; quiz 68

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18215753

Improved wound healing by low-level laser irradiation after gingivectomy operations: a controlled clinical pilot study.

Ozcelik O, Cenk Haytac M, Kunin A, Seydaoglu G

Department of Periodontology, Faculty of Dentistry, Cukurova University, Adana, Turkey

AIM: Low-level laser therapy (LLLT) may induce morphological, molecular and cellular processes, which are involved in wound healing. The aim of this split-mouth controlled clinical trial was to assess the effects of LLLT on healing of gingiva after gingivectomy and gingivoplasty. MATERIAL AND METHODS: Twenty patients with inflammatory gingival hyperplasias on their symmetrical teeth were included in this study. After gingivectomy and gingivoplasty, a diode laser (588 nm) was randomly applied to one side of the operation area for 7 days. The surgical areas were disclosed by a solution (Mira-2-tones) to visualize the areas in which the epithelium is absent. Comparison of the surface areas on the LLLT-applied sites and controls were made with an image-analysing software. RESULTS: Despite the prolonged time needed for application, patients have tolerated LLLT well. While there were no statistically significant differences between the stained surface areas of the LLLT applied and the control sites immediately after the surgery, LLLT-applied sites had significantly lower stained areas compared with the controls on the post-operative third, seventh and 15th day (p<0.001 for each). CONCLUSIONS: Within the limitations of this study, the results indicated that LLLT may enhance epithelization and improve wound healing after gingivectomy and gingivoplasty operations.

J Clin Periodontol 2008 Mar 35(3) 250-4

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18269665

Rehabilitation in the first 48 hours after surgery.

Shumway R

Animal Medical Center, New York, New York 10021, USA. renee.shumway@amcny.org

Physical therapy is commonly used postoperatively in humans to decrease pain, inflammation and recovery time. The same goals can be achieved in our veterinary patients using similar modalities such as; cryotherapy, passive range of motion, massage, transcutaneous electrical stimulation and low-level light laser therapy. When used in the first 48 hours following surgery, the reduction in pain, increased mobility, and decreased inflammation will aid in early return to normal function. Applied appropriately these treatments have both immediate and long term benefits.

Clin Tech Small Anim Pract 2007 Nov 22(4) 166-70

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18198785

Laser phototherapy effect on protein metabolism parameters of rat salivary glands.

Simoes A, Siqueira WL, Lamers ML, Santos MF, Eduardo CD, Nicolau J

Oral Biology Research Center, Faculty of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, Cidade Universitaria, Sao Paulo, SP, 05508-000, Brazil, lysimoes@usp.br.

The aim of this study was to evaluate the effects of infrared diode laser phototherapy (LP) on tissues of the submandibular gland (SMG) and parotid gland (PG). Wistar rats were randomly divided into experimental (A and B) and control (C) groups. A diode laser, 808 nm wavelength, in continuous wave mode, was applied to the PG, SMG and sublingual gland in the experimental groups on two consecutive days. The doses were 4 J/cm(2) and 8 J/cm(2), and total energy was 7 J and 14 J, respectively. The power output (500 mW) and power density (277 mW/cm(2)) were the same for both experimental groups. In order to visualize the area irradiated by the infrared laser, we used a red pilot beam (650 nm) with 3 mW maximum power for the experimental groups. For the control group, the red pilot beam was the only device used. The SMG and PG were removed after 1 week of the first irradiation. Total protein concentration, amylase, peroxidase, catalase and lactate dehydrogenase assays were performed, as well as histological analysis. Statistical tests revealed significant increase in the total protein concentration for groups A and B in the parotid glands (P < 0.05). Based on the results of this study, LP altered the total protein concentration in rats’ parotid glands.

Lasers Med Sci 2008 Feb 29

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18309457

Initial effects of low-level laser therapy on growth and differentiation of human osteoblast-like cells.

Stein E, Koehn J, Sutter W, Wendtlandt G, Wanschitz F, Thurnher D, Baghestanian M, Turhani D

Department of Cranio-Maxillofacial and Oral Surgery, Medical University of Vienna, Austria.

Low-level laser therapy is a clinically well established tool for enhancement of wound healing. In vitro studies have also shown that low level laser therapy has a biostimulatory effect on cells of different origin. The aim of this in vitro study was to investigate the initial effect of low-level laser therapy on growth and differentiation of human osteoblast-like cells. SaOS-2 cells were irradiated with laser doses of 1 J/cm(2) and 2 J/cm(2) using a diode laser with 670 nm wave length and an output power of 400 mW. Untreated cells were used as controls. At 24 h, 48 h and 72 h post irradiation, cells were collected and assayed for viability of attached cells and alkaline phosphatase specific activity. In addition, mRNA expression levels of osteopontin and collagen type I were assessed using semi-quantitative RT-PCR. Over the observation period, cell viability, alkaline phosphatase activity and the expression of osteopontin and collagen type I mRNA were slightly enhanced in cells irradiated with 1 J/cm(2) compared with untreated control cells. Increasing the laser dose to 2 J/cm(2) reduced cell viability during the first 48 h and resulted in persistently lower alkaline phosphatase activity compared with the other two groups. The expression of osteopontin and collagen type I mRNA slightly decreased with time in untreated controls and cells irradiated with 1 J/cm(2), but their expression was increased by treatment with 2 J/cm(2) after 72 h. These results indicate that low-level laser therapy has a biostimulatory effect on human osteoblast-like cells during the first 72 h after irradiation. Further studies are needed to determine the potential of low-level laser therapy as new treatment concept in bone regeneration.

Wien Klin Wochenschr 2008 Feb 120(3-4) 112-117

http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=DetailsSearch&Term=18322773

Effect of the CO2 laser combined with fluoridated products on the inhibition of enamel demineralization.

Steiner-Oliveira C, Rodrigues LK, Lima EB, Nobre-dos-Santos M

Piracicaba School of Dentistry at the State University of Campinas in Piracicaba, SP, Brazil.

AIM: This in vitro study evaluated the combined effects of a 10.6 microm CO2 laser, fluoridated dentifrice, and mouthrinse on the reduction of lesion progression in carious human enamel. METHODS AND MATERIALS: Slabs of previously demineralized dental enamel were assigned to nine groups, either treated with/without a CO2 laser, with/without fluoridated dentifrice, and with/without fluoridated mouthrinse. After a pH-cycling regime, fluoride concentrations were determined in the demin- and remineralizing solutions. A qualitative polarized light analysis was performed on enamel, and enamel mineral loss was determined by cross-sectional microhardness testing. RESULTS: All treatments were able to decrease mineral loss, and the inhibition of demineralization progression ranged from 48% to 60%. CONCLUSION: The 10.6 microm CO2 laser irradiation alone or combined with fluoridated products reduced demineralization progression in enamel. However, there was no significant additional demineralization inhibitory effect with the use of the combined laser-fluoride treatments. CLINICAL SIGNIFICANCE: CO2 lasers have proven to be efficient in reducing subsurface enamel demineralization. Its association with a high frequent fluoride therapy may enhance this protective effect.

J Contemp Dent Pract 2008 9(2) 113-21

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18264533

Effects of Low-Level Laser Therapy and Eccentric Exercises in the Treatment of Recreational Athletes With Chronic Achilles Tendinopathy.

Stergioulas A, Stergioula M, Aarskog R, Lopes-Martins RA, Bjordal JM

Peloponnese University, Sparta, Laconia, Greece.

BACKGROUND: Eccentric exercises (EEs) are recommended for the treatment of Achilles tendinopathy, but the clinical effect from EE has a slow onset. HYPOTHESIS: The addition of low-level laser therapy (LLLT) to EE may cause more rapid clinical improvement. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: A total of 52 recreational athletes with chronic Achilles tendinopathy symptoms were randomized to groups receiving either EE + LLLT or EE + placebo LLLT over 8 weeks in a blinded manner. Low-level laser therapy (lambda = 820 nm) was administered in 12 sessions by irradiating 6 points along the Achilles tendon with a power density of 60 mW/cm(2) and a total dose of 5.4 J per session. RESULTS: The results of the intention-to-treat analysis for the primary outcome, pain intensity during physical activity on the 100-mm visual analog scale, were significantly lower in the LLLT group than in the placebo LLLT group, with 53.6 mm versus 71.5 mm (P = .0003) at 4 weeks, 37.3 mm versus 62.8 mm (P = .0002) at 8 weeks, and 33.0 mm versus 53.0 mm (P = .007) at 12 weeks after randomization. Secondary outcomes of morning stiffness, active dorsiflexion, palpation tenderness, and crepitation showed the same pattern in favor of the LLLT group. CONCLUSION: Low-level laser therapy, with the parameters used in this study, accelerates clinical recovery from chronic Achilles tendinopathy when added to an EE regimen. For the LLLT group, the results at 4 weeks were similar to the placebo LLLT group results after 12 weeks.

Am J Sports Med 2008 Feb 13

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18272794

Light therapy and advanced wound care for a neuropathic plantar ulcer on a charcot foot.

Sutterfield R

Christian Hospital NE, St. Louis, Missouri 63136, USA. retta@fidnet.com

Light therapy is a relatively novel modality in wound care. I used a light-emitting diode (LED) and superluminous diode (SLD) to deliver low-intensity laser light as an adjunctive treatment to a patient with a chronic diabetic foot ulcer. Standard treatment of conservative sharp debridement, off-loading, bioburden management, and advanced dressings was delivered in a WOC clinic setting. This combination of therapies resulted in closure of the neuropathic plantar ulcer within 8 weeks.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18199948
Photobiomodulation of the development of early mouse embryos by luminescent irradiation with lambda(max) = 626 nm.

Sviridova-Chailakhyan TA, Paskevich SI, Fahranurova LI, Khramov RN, Manokhin AA, Simonova NB, Chailakhyan LM

Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, pr Nauki, Pushchino, Moscow oblast 142292, Russia.

Dokl Biol Sci 2007 Nov-Dec 417 472-5

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18274495

Pulsed dye laser for the treatment of hypergranulation tissue with chronic ulcer in postsurgical defects.

Wang SQ, Goldberg LH

Department of Medicine, Dermatology Service, Memorial Sloan Kettering Cancer Center, New York, NY 07920, USA. wangs@mskcc.org

BACKGROUND AND OBJECTIVE: Hypergranulation tissue may complicate postoperative wounds, causing them to become chronic nonhealing ulcers. There is no reliably effective treatment. We report the use of the 595-nm pulsed-dye laser (PDL) for the treatment of wounds healing by second intention and complicated by hypergranulation tissue after Mohs micrographic surgery. METHODS: In a retrospective case review, 9 patients with slow-healing or nonhealing postoperative wounds with hypergranulation tissue were treated with the 595-nm PDL. The majority of the wounds were located on the scalp, forehead, and temple. RESULTS: All of the patients demonstrated dramatic improvement after one treatment. Most patients achieved complete or near complete re-epithelialization of the ulcers after 1 to 2 treatments. The PDL treatment required no local anesthesia, and there were no postlaser treatment complications reported. CONCLUSIONS: The 595-nm PDL is an effective, safe, and reliable treatment to promote second intention healing in postsurgical wounds complicated by the formation of hypergranulation tissue.

J Drugs Dermatol 2007 Dec 6(12) 1191-4

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18189058

Phototherapy promotes cell migration in the presence of hydroxyurea.

Zungu IL, Mbene AB, Hawkins Evans DH, Houreld NN, Abrahamse H

Laser Research Group, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg, 2028, South Africa, habrahamse@uj.ac.za.

Phototherapy has been shown to cause an increase in cell proliferation and migration. This study focused on viability (trypan blue), proliferation [sodium 3′-(1-(phenylaminocarbonyl)-3,4-tetrazolium)-bis(4-methoxy-6-nitro)-benzen e sulphonic acid hydrate (XTT) and adenosine triphosphate (ATP)] and migration of WS1 cells following irradiation in the presence of hydroxyurea (HU), which is an inhibitor of proliferation. Wounded cells were irradiated on days 1 and 4 with a fluence of 5 J/cm(2) with a helium-neon (He-Ne) laser at 632.8 nm. After a repair time of 24 h, cellular responses were assessed. Wounded irradiated cells without HU showed an increase in cell viability and proliferation, which was confirmed by complete wound closure by day 4. Although wounded irradiated cells treated with 5 mM HU showed incomplete wound closure, these cells showed increased migration compared with that of control cells. This study showed that laser irradiation using an He-Ne laser with a fluence of 5 J/cm(2) stimulates cell viability. The HU results confirmed that laser irradiation promotes cell migration and proliferation.

Lasers Med Sci 2008 Jan 23

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18214574