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Evaluation of low-level laser therapy effectiveness on the pain and masticatory performance of patients with myofascial pain
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Evaluation of low-level laser therapy effectiveness on the pain and masticatory performance of patients with myofascial pain
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Journal Article
Evaluation of low-level laser therapy effectiveness on the pain and masticatory performance of patients with myofascial pain
2014
Overview
This study investigated the effect of low-level laser therapy (LLLT) on the masticatory performance (MP), pressure pain threshold (PPT), and pain intensity in patients with myofascial pain. Twenty-one subjects, with myofascial pain according to Research Diagnostic Criteria/temporomandibular dysfunction, were divided into laser group (
n
= 12) and placebo group (
n
= 9) to receive laser therapy (active or placebo) two times per week for 4 weeks. The measured variables were: (1) MP by analysis of the geometric mean diameter (GMD) of the chewed particles using Optocal test material, (2) PPT by a pressure algometer, and (3) pain intensity by the visual analog scale (VAS). Measurements of MP and PPT were obtained at three time points: baseline, at the end of treatment with low-level laser and 30 days after (follow-up). VAS was measured at the same times as above and weekly throughout the laser therapy. The Friedman test was used at a significance level of 5 % for data analysis. The study was approved by the Ethics Committee of the Federal University of Sergipe (CAAE: 0025.0.107.000-10). A reduction in the GMD of crushed particles (
p
< 0.01) and an increase in PPT (
p
< 0.05) were seen only in the laser group when comparing the baseline and end-of-treatment values. Both groups showed a decrease in pain intensity at the end of treatment. LLLT promoted an improvement in MP and PPT of the masticatory muscles.
Publisher
Springer London,Springer Nature B.V
Subject
/ Adult
/ Ethics
/ Face
/ Facial Pain - physiopathology
/ Female
/ Humans
/ Lasers
/ Lasers, Semiconductor - therapeutic use
/ Male
/ Mastication - radiation effects
/ Masticatory Muscles - physiopathology
/ Masticatory Muscles - radiation effects
/ Medicine
/ Muscles
/ Optics
/ Pain
/ Pain Threshold - radiation effects
/ Patients
/ Temporomandibular Joint Disorders - physiopathology
/ Temporomandibular Joint Disorders - radiotherapy
/ Therapy
/ Visual
