ANALYSIS OF LASER THERAPY AND ASSESSMENT METHODS IN THE REHABILITATION OF TEMPOROMANDIBULAR DISORDER: A SYSTEMATIC REVIEW OF THE LITERATURE
Carolina Marciela Herpich, Ana Paula Amaral, Ernesto Cesar Pinto Leal-Junior, Juliana de Paiva Tosato, Cid Andre Fidelis de Paula Gomes, Éric Edmur Camargo Arruda, Igor Phillip dos Santos Glória, Marilia Barbosa Santos Garcia, Bruno Roberto Borges Barbosa, Monique Sampaio Rodrigues, Katiane Lima Silva, Yasmin El Hage, Fabiano Politti, Tabajara de Oliveira Gonzalez, Sandra Kalil Bussadori, and Daniela Aparecida Biasotto-Gonzalez
BACKGROUND: The aim of the present study was to perform a systematic review of the literature on the effects of low-level laser therapy in the treatment of TMD, and to analyze the use of different assessment tools.
SUBJECTS AND METHODS: Searches were carried out of the BIREME, MEDLINE, PubMed and SciELO electronic databases by two independent researchers for papers published in English and Portuguese using the terms: “temporomandibular joint laser therapy” and “TMJ laser treatment”.
RESULTS: Following the application of the eligibility criteria, 11 papers were selected for in-depth analysis. The papers analyzed exhibited considerable methodological differences, especially with regard to the number of sessions, anatomic site and duration of low-level laser therapy irradiation, as well as irradiation parameters, diagnostic criteria and assessment tools.
CONCLUSION: Further studies are needed, especially randomized clinical trials, to establish the exact dose and ideal parameters for low-level laser therapy and define the best assessment tools in this promising field of research that may benefit individuals with signs and symptoms of TMD.
Full article can be accessed here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4305586/
Download PDF here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4305586/pdf/jpts-27-295.pdf
SUPERPULSED (GA-AS, 904 NM) LOW-LEVEL LASER THERAPY (LLLT) ATTENUATES INFLAMMATORY RESPONSE AND ENHANCES HEALING OF BURN WOUNDS
Gupta A, Keshri GK, Yadav A, Gola S, Chauhan S, Salhan AK, Bala Singh S
BACKGROUND: Low-level laser therapy (LLLT) using superpulsed near-infrared light can penetrate deeper in the injured tissue and could allow non-pharmacological treatment for chronic wound healing.
SUBJECTS AND METHODS: This study investigated the effects of superpulsed laser (Ga-As 904 nm, 200 ns pulse width; 100 Hz; 0.7 mW mean output power; 0.4 mW/cm(2) average irradiance; 0.2 J/cm(2) total fluence) on the healing of burn wounds in rats, and further explored the probable associated mechanisms of action.
RESULTS: Irradiated group exhibited enhanced DNA, total protein, hydroxyproline and hexosamine contents compared to the control and silver sulfadiazine (reference care) treated groups. LLLT exhibited decreased TNF-α level and NF-kB, and up-regulated protein levels of VEGF, FGFR-1, HSP-60, HSP-90, HIF-1α and matrix metalloproteinases-2 and 9 compared to the controls.
CONCLUSION: LLLT using superpulsed 904 nm laser reduced the inflammatory response and was able to enhance cellular proliferation, collagen deposition and wound contraction in the repair process of burn wounds. Photomicrographs showing no, absence inflammation and faster wound contraction in LLLT superpulsed (904 nm) laser treated burn wounds as compared to the non-irradiated control and silver sulfadiazine (SSD) ointment (reference care) treated wounds.
Retrieved from: http://www.ncbi.nlm.nih.gov/pubmed/25207838
BIOLOGICAL EFFECTS OF LOW LEVEL LASER THERAPY
Farivar S, Malekshahabi T, Shiari R
The use of low level laser to reduce pain, inflammation and edema, to promote wound, deeper tissues and nerves healing, and to prevent tissue damage has been known for almost forty years since the invention of lasers. This review will cover some of the proposed cellular mechanisms responsible for the effect of visible light on mammalian cells, including cytochrome c oxidase (with absorption peaks in the Near Infrared (NIR)). Mitochondria are thought to be a likely site for the initial effects of light, leading to increased ATP production, modulation of reactive oxygen species, and induction of transcription factors. These effects in turn lead to increased cell proliferation and migration (particularly by fibroblasts).
Retrieved from: http://www.ncbi.nlm.nih.gov/pubmed/25653800
Full text article available here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4291815/
PDF download here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4291815/pdf/jlms-5-58.pdf