The analgesic effect of photobiomodulation therapy (830 nm) on the masticatory muscles: a randomized, double-blind study

Abstract

This study assesses the efficacy of photobiomodulation therapy (830 nm) for myalgia treatment of masticatory muscles. Sixty patients with muscular myalgia were selected and randomly allocated into 2 groups (n=30): Group A comprised patients given a placebo (control), and Group B consisted of those undergoing photobiomodulation therapy (PBMT). PBMT and placebo were applied bilaterally to specific points on the masseter and temporal muscles. Referred pain elicited by palpation and maximum mouth opening were measured before (EV1) and after (EV2) the treatments. The data were analyzed using statistical tests, considering a significance level of 5%. No significant differences in range were observed for active or passive mouth opening (p ≥ 0.05). Comparing the final outcomes (EV1-EV2) of both treatments, statistical significance was verified for total pain in the right masseter muscle (p = 0.001) and total pain (p = 0.005). In EV2, significant differences in pain reported with palpation were found between Groups A and B for the following: left posterior temporal muscle (p = 0.025), left superior masseter muscle (p = 0.036), inferior masseter muscle (p = 0.021), total pain (left side) (p = 0.009), total masseter muscle (left side) (p = 0.014), total temporal (left side) (p = 0.024), and total pain (p = 0.035). We concluded that PBMT (830 nm) reduces pain in algic points, but does not influence the extent of mouth opening in patients with myalgia.

Photobiomodulation in speech-language-hearing therapy: a profile of professional practice and the level of information of Brazilian speech-language-hearing therapists

“…This specific standardization is expected to increase the use of laser, as it potentializes the SLH treatment when associated with other conventional therapies in the field. It is also expected that further research will be conducted to find evidence in SLH clinic [14][15][16] .…”

Role of Photobiomodulation Therapy in Modulating Oxidative Stress in Temporomandibular Disorders. A Systematic Review and Meta-Analysis of Human Randomised Controlled Trials

“…Consequently, 44 out of 51 full text articles were included and analysed in the present systematic review . Furthermore, 32 out of 44 studies qualified for a meta-analysis [57,58,[60][61][62][63][64][65][66][67][68][69][70][71][72][73][74]77,78,81,[83][84][85][86]88,89,91,[95][96][97]99,100] (inter-reviewer agreement, κ = 1). The PRISMA flow diagram for search strategy utilised in the present systematic review and meta-analysis is illustrated in Figure 2.…”

“…The sample size (n) distribution amongst the included studies was as follows; n > 50 in 10 studies [58,64,65,69,82,[89][90][91]93,98], n = 40-50 in 15 studies [59,61,62,67,68,70,73,[83][84][85]87,88,92,95,99], n = 30-40 in 7 studies [72,73,75,78,81,95,98], n = 20-30 in 7 studies [57,58,76,77,80,87,97] and n = 10-20 in 5 studies [61,64,67,79,82].…”

Comparative effectiveness of low-level laser therapy and transcutaneous electric nerve stimulation in the treatment of pain caused by temporomandibular joint disorders: a systematic review and network meta-analysis

“…Then 55 potentially eligible articles were obtained by screening the titles and abstracts carefully. After careful full-text screening and assessment of the risk of bias, 20 RCTs met the inclusion criteria [4,10,12,15,28,[34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. This selection process and exclusion reasons were presented in the ow chart (Fig.…”