Evaluation of low-level laser therapy effectiveness on the pain and masticatory performance of patients with myofascial pain

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• 作者：Mila Leite de Moraes Maia (1)
  Maria Amália Gonzaga Ribeiro (2)
  Luiz Guilherme Martins Maia (3) (4)
  Juliana Stuginski-Barbosa (5)
  Yuri Martins Costa (5)
  André Luís Porporatti (5)
  Paulo César Rodrigues Conti (5)
  Leonardo Rigoldi Bonjardim (6) (7)
  
• 关键词：Laser therapy ; Myofascial pain ; Temporomandibular dysfunction ; Masticatory performance ; Pressure pain threshold
• 刊名：Lasers in Medical Science
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：29
• 期：1
• 页码：29-35
• 全文大小：198 KB
• 作者单位：Mila Leite de Moraes Maia (1)
  Maria Amália Gonzaga Ribeiro (2)
  Luiz Guilherme Martins Maia (3) (4)
  Juliana Stuginski-Barbosa (5)
  Yuri Martins Costa (5)
  André Luís Porporatti (5)
  Paulo César Rodrigues Conti (5)
  Leonardo Rigoldi Bonjardim (6) (7)
  
  1. Health Science Program, Federal University of Sergipe, Sergipe, Brazil
  2. Departament of Dentistry, Federal University of Sergipe, Sergipe, Brazil
  3. UNESP, Araraquara, SP, Brazil
  4. Departament of Dentistry, Tiradentes Univesity, Tiradentes, Brazil
  5. Department of Prosthodontics, Bauru School of Dentistry, University of S?o Paulo, Bauru, Brazil
  6. Departament of Physiology, Federal University of Sergipe, Sergipe, Brazil
  7. Departamento de Fisiologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Sergipe, 49100-000, Sergipe, SE, Brazil
  
• ISSN：1435-604X

文摘

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--2) and placebo group (n--) 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-lt;-.01) and an increase in PPT (p-lt;-.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.