Leissner Oliver, Maulén-Yáñez Miguel, Meeder-Bella Walther, León-Morales Camilo, Vergara-Bruna Eduardo, González-Arriagada Wilfredo Alejandro
Department of Oral Physiology, Temporomandibular Disorders and Orofacial Pain, Universidad de Valparaíso, Valparaíso, Chile.
Clinic of Temporomandibular Disorders and Orofacial Pain, Department of Dentistry, Gustavo Fricke Hospital, Viña del Mar, Chile.
J Dent Sci. 2021 Jan;16(1):241-248. doi: 10.1016/j.jds.2020.05.015. Epub 2020 Jun 6.
BACKGROUND/PURPOSE: Temporomandibular disorders (TMD) are common conditions that involve the temporomandibular joints (TMJs), jaw muscles, or both, and can cause alteration in the mandibular kinematics. The aim of this study was to assess the relationship between mandibular kinematics and temporomandibular joint disorders (TMJD) as a clinical tool for evaluation and diagnosis of these patients.
A retrospective study based on the analysis of the clinical findings from patients' charts was carried out, with a sample size of 476 patients. Statistical analysis was made with chi-square test for qualitative variables and student t-test for quantitative variables. Then, odds ratio with its confidence interval were calculated. A p value < 0.05 was considered statistically significant.
Most patients were female (80.7%) and between 16 and 25 years old. Disc displacement with reduction (DDwR) and subluxation were associated with increased kinematic parameters, while disc displacement without reduction (DDwoR) and retrodiscitis were associated with decreased kinematic values. A soft end feel was related to osteoarthritis (OA). Structural incompatibility was most prevalent in older patients.
Mandibular kinematic values are associated with specific temporomandibular joint disorders and could be considered as a useful clinical tool to perform the right diagnosis of TMJD.
背景/目的：颞下颌关节紊乱病（TMD）是一种常见疾病，累及颞下颌关节（TMJ）、颌面部肌肉或两者皆有，并可导致下颌运动学改变。本研究旨在评估下颌运动学与颞下颌关节紊乱病（TMJD）之间的关系，作为评估和诊断这些患者的临床工具。
基于对患者病历临床资料分析开展一项回顾性研究，样本量为476例患者。对定性变量采用卡方检验，对定量变量采用学生t检验进行统计分析。然后，计算比值比及其置信区间。p值<0.05被认为具有统计学意义。
大多数患者为女性（80.7%），年龄在16至25岁之间。可复性盘移位（DDwR）和半脱位与运动学参数增加有关，而不可复性盘移位（DDwoR）和盘后区炎与运动学值降低有关。软终末感与骨关节炎（OA）有关。结构不匹配在老年患者中最为常见。
下颌运动学值与特定的颞下颌关节紊乱病相关，可被视为对TMJD进行正确诊断的有用临床工具。
