Effects of Jaw-Opening Exercises With/without Pain for Temporomandibular Disorders: A Pilot Randomized Controlled Trial

Overview

Journal Int J Environ Res Public Health

Publisher MDPI

Specialties Environmental Health
Public Health

Date 2022 Dec 23

PMID 36554726

Authors

Shoko Tobe

Hiroyuki Ishiyama

Akira Nishiyama

Keisuke Miyazono

Hiroko Kimura

Kenji Fueki

Affiliations

Soon will be listed here.

Abstract

This study aimed to evaluate the effects of jaw-opening exercises with and without pain on temporomandibular disorders (TMDs), specifically in relation to pain intensity and range-of-mouth opening in patients with TMDs. Participants were randomly assigned to either the jaw-opening exercise with pain (JE w/pain) or the jaw-opening exercise without pain (JE w/o pain) groups, and each exercise was performed for eight weeks. TMDs pain intensity was assessed using a 100-mm visual analog scale (VAS), and the range-of-mouth opening was evaluated at the baseline (T0), 2 weeks (T1), 4 weeks (T2), and 8 weeks (T3). Of the 61 participants, 57 (JE w/pain group, = 30; JE w/o pain group, = 27) were included in the analysis. The range-of-mouth opening and TMDs pain intensity improved from T1 to T3 in both groups. The JE w/pain group showed significant differences at T3 compared to T1 (pain-free unassisted mouth opening, = 0.006; jaw-opening pain, = 0.014; chewing pain, = 0.018). In addition, the JE w/pain group showed significantly greater changes in the maximum unassisted mouth opening at T2 and T3 than the JE w/o pain group (T2, < 0.001; T3, = 0.003). Thus, jaw-opening exercises, until the occurrence of pain, may be effective in patients with TMDs.

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