Leal de Godoy Camila Haddad, Motta Lara Jansiski, Santos Fernandes Kristianne Porta, Mesquita-Ferrari Raquel Agnelli, Deana Alessandro Melo, Bussadori Sandra Kalil
Doctoral Student in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil.
Professor, Postgraduate Program in Health Systems Management, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil.
J Oral Maxillofac Surg. 2015 Apr;73(4):622-9. doi: 10.1016/j.joms.2014.09.018. Epub 2014 Oct 2.
The aim of this pilot study was to evaluate the effect of low-level laser therapy on pain, mandibular movements, and occlusal contacts in adolescents and young adults with temporomandibular disorder.
Individuals aged 14 to 23 years were evaluated. The Research Diagnostic Criteria for Temporomandibular Disorders were used for the diagnosis of temporomandibular disorders. Pain was assessed with a visual analog scale. Occlusal contacts were recorded using the T-Scan III program (Tekscan, Boston, MA). The participants were randomly allocated to 2 groups: active or placebo laser treatment. The laser parameters were as follows: wavelength of 780 nm, energy density of 33.5 J/cm(2), power of 50 mW, power density of 1.67 W/cm(2), and 20-second exposure time. The Kolmogorov-Smirnov test was used to determine the normality of the data distribution. The paired t test was used for the comparisons of the pretreatment and post-treatment results. The SPSS program for Windows (version 15.0; SPSS, Chicago, IL) was used for all analyses, with the level of significance set at 5% (P < .05).
No statistically significant differences between groups were found for the right and left anterior temporal muscles (P = .3801 and P = .5595, respectively), superior masseter muscles (P = .087 and P = .1969, respectively), medial masseter muscles (P = .2241 and P = .076, respectively), or inferior masseter muscles (P = .5589 and P = .3268, respectively) after treatment.
No statistically significant differences were found regarding pain, mandibular range of motion, or the distribution of occlusal contacts after treatment with low-level laser therapy. These preliminary results need to be verified in a larger sample of patients to confirm the lack of response to low-level laser therapy.
本初步研究的目的是评估低强度激光疗法对患有颞下颌关节紊乱的青少年和年轻成年人的疼痛、下颌运动及咬合接触的影响。
对年龄在14至23岁的个体进行评估。采用颞下颌关节紊乱研究诊断标准来诊断颞下颌关节紊乱。使用视觉模拟量表评估疼痛。使用T-Scan III程序（Tekscan，马萨诸塞州波士顿）记录咬合接触情况。参与者被随机分为两组：主动激光治疗组或安慰剂激光治疗组。激光参数如下：波长780纳米, 能量密度33.5焦/平方厘米, 功率50毫瓦, 功率密度1.67瓦/平方厘米, 照射时间20秒。使用柯尔莫哥洛夫-斯米尔诺夫检验来确定数据分布的正态性。采用配对t检验比较治疗前和治疗后的结果。所有分析均使用Windows版SPSS程序（版本15.0；SPSS，伊利诺伊州芝加哥），显著性水平设定为5%（P < 0.05）。
治疗后，两组在右侧和左侧颞前肌（分别为P = 0.3801和P = 0.5595）、咬肌上份（分别为P = 0.087和P = 0.1969）、咬肌中份（分别为P = 0.2241和P = 0.076）或咬肌下份（分别为P = 0.5589和P = 0.3268）方面均未发现统计学上的显著差异。
低强度激光疗法治疗后，在疼痛、下颌运动范围或咬合接触分布方面未发现统计学上的显著差异。这些初步结果需要在更大样本的患者中进行验证，以确认对低强度激光疗法无反应。
