Department of Maxillofacial Radiology, (Head: Mahtab Memarpour), School of Dentistry, Shiraz University of Medical Sciences, Ghomabad Street, Ghasredasht Avenue, #1836-71345, Shiraz, Iran.
Department of Maxillofacial Radiology, (Head: Mahtab Memarpour), School of Dentistry, Shiraz University of Medical Sciences, Ghomabad Street, Ghasredasht Avenue, #1836-71345, Shiraz, Iran.
J Craniomaxillofac Surg. 2019 Mar;47(3):438-442. doi: 10.1016/j.jcms.2018.12.012. Epub 2018 Dec 23.
Temporomandibular disorder (TMD) is a common problem in modern societies. Causes of TMD, as a consequence of condylar asymmetry index (CAI), are still a subject of controversy. The aim of the present study was to determine the possible correlations between the degree of condylar asymmetry and clinical dysfunction indices.
In this cross-sectional study, we used the Habets method to measure the CAI in 42 TMD patients. The participants' age and sex were matched in the control group. Patients were divided into mild, moderate and severe dysfunction groups based on Helkimo's clinical Di. The data were analyzed using Mann-Whitney U and Kruskal-Wallis tests. Also, the study attempted to assess the possibility of correlation between age and CAI.
The CAI values of TMD patients were significantly higher than those of the control group (P = 0.001). However, CAI was not significantly different among TMD patients with different dysfunction index. There was no significant correlation between CAI and age (Spearman r = 0.655, P = 0.23).
Based on the findings of the present study, patients with condylar asymmetry index are more susceptible to TMD. However, degree of the condylar asymmetry is not a criterion for TMD signs and symptoms.
颞下颌关节紊乱（TMD）是现代社会的常见问题。由于髁突不对称指数（CAI），TMD 的病因仍然存在争议。本研究的目的是确定髁突不对称程度与临床功能障碍指数之间的可能相关性。
在这项横断面研究中，我们使用 Habets 方法测量了 42 名 TMD 患者的 CAI。在对照组中，患者的年龄和性别相匹配。根据 Helkimo 的临床 Di 将患者分为轻度、中度和重度功能障碍组。使用 Mann-Whitney U 和 Kruskal-Wallis 检验分析数据。此外，该研究还试图评估 CAI 与年龄之间可能存在的相关性。
TMD 患者的 CAI 值明显高于对照组（P=0.001）。然而，不同功能障碍指数的 TMD 患者之间的 CAI 没有显著差异。CAI 与年龄之间没有显著相关性（Spearman r=0.655，P=0.23）。
根据本研究的结果，具有髁突不对称指数的患者更容易患 TMD。然而，髁突不对称的程度不是 TMD 体征和症状的标准。
