Kurita H, Ohtsuka A, Kobayashi H, Kurashina K
Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan.
Dentomaxillofac Radiol. 2002 Nov;31(6):373-8. doi: 10.1038/sj.dmfr.4600727.
The purpose of this retrospective study was to analyse the relationship between horizontal size of the mandibular condyle and internal derangement (ID) of the temporomandibular joint (TMJ).
One hundred and thirty-nine joints in 88 women aged over 18 years were included in this study. The horizontal condylar size was measured in the antero-posterior and medio-lateral (ML) dimensions using axial magnetic resonance (MR) images. Radiological findings of ID were also assessed from MR imaging.
The condyles in the joints with permanent disk displacement were smaller than those in joints without displacement in both dimensions (Fisher's protected least significant difference, P<0.05). There were statistically significant correlations between horizontal condylar size in the ML dimension and both disk morphology and radiological stage of ID (Spearman's correlation coefficient by rank, P<0.05).
The results of this study suggest a possible relationship between horizontal condylar size and disk displacement. It is also suggested that the condyle becomes smaller in the ML dimension with advancement of ID.
本回顾性研究旨在分析下颌髁突水平尺寸与颞下颌关节（TMJ）内紊乱（ID）之间的关系。
本研究纳入了88名18岁以上女性的139个关节。使用轴向磁共振（MR）图像在前-后和中-外侧（ML）维度测量髁突的水平尺寸。还从MR成像评估ID的影像学表现。
在两个维度上，永久性盘移位关节中的髁突均小于无移位关节中的髁突（Fisher保护最小显著差异，P<0.05）。ML维度的髁突水平尺寸与盘形态和ID的影像学分期之间存在统计学显著相关性（Spearman等级相关系数，P<0.05）。
本研究结果表明髁突水平尺寸与盘移位之间可能存在关系。还表明随着ID进展，髁突在ML维度上变小。
