Department of Masticatory Science, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Department of Oral Diagnostic Sciences, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand.
J Oral Rehabil. 2024 Jun;51(6):998-1004. doi: 10.1111/joor.13674. Epub 2024 Mar 7.
Patients with painful temporomandibular disorders (TMD) more often experience jaw functional limitations. The study of jaw functional limitations should be primarily focused on painful TMD.
The impact of TMD pain characteristics (source, chronicity and intensity) on jaw functional limitations were evaluated using Jaw Functional Limitation Scale (JFLS).
This cross-sectional study reviewed the dental records and self-report questionnaires of patients with painful TMD. The pain source, chronicity and intensity were evaluated to study the TMD pain characteristics. The jaw functional limitations were analysed using the Thai version of the JFLS.
A total of 176 patients with painful TMD were included in this study. The jaw functional limitations were affected only by pain intensity. Patients with TMD with severe pain intensity had significantly higher jaw functional limitations than those with mild-to-moderate pain intensity (p < .05). A significant association was observed between pain intensity and jaw functional limitations (p < .05). Mastication was highly restricted by pain intensity (odd ratio = 1.39, 95% confidence interval = 1.16-1.67).
The present study found a significant effect of TMD pain intensity on jaw functional limitations. Patients with severe TMD pain intensity were more likely to experience jaw functional limitations, particularly mastication limitation. Management focusing on reduction of pain intensity may improve jaw functions in patients with TMD.
患有疼痛性颞下颌关节紊乱（TMD）的患者更常经历颌功能受限。颌功能受限的研究应主要集中在疼痛性 TMD 上。
使用颌功能受限量表（JFLS）评估 TMD 疼痛特征（来源、持续性和强度）对颌功能受限的影响。
本横断面研究回顾了疼痛性 TMD 患者的牙科记录和自我报告问卷。评估疼痛源、持续性和强度以研究 TMD 疼痛特征。使用泰语版 JFLS 分析颌功能受限。
本研究共纳入 176 例疼痛性 TMD 患者。颌功能受限仅受疼痛强度影响。疼痛强度严重的 TMD 患者的颌功能受限明显高于疼痛强度轻度至中度的患者（p <.05）。疼痛强度与颌功能受限之间存在显著相关性（p <.05）。疼痛强度高度限制咀嚼（比值比=1.39，95%置信区间=1.16-1.67）。
本研究发现 TMD 疼痛强度对颌功能受限有显著影响。疼痛强度严重的 TMD 患者更有可能出现颌功能受限，尤其是咀嚼受限。专注于减轻疼痛强度的管理可能会改善 TMD 患者的颌功能。
