Sülün T, Cemgil T, Duc J M, Rammelsberg P, Jäger L, Gernet W
Department of Prosthetic Dentistry, University of Istanbul, Turkey.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2001 Jul;92(1):98-107. doi: 10.1067/moe.2001.114621.
The purpose of this study was to evaluate temporomandibular joint morphology and to compare possible structural variations in the temporomandibular joint anatomy of symptomatic anterior disk displacement patients with possible structural variations in the temporomandibular joint anatomy of symptom-free volunteers.
Fifty-six symptomatic patients and 25 symptom-free volunteers were included in this study. All subjects had bilateral high-resolution magnetic resonance imaging scans performed in the sagittal (closed and open) positions. Disk positions were evaluated with these images, and the patients were accordingly classified into 4 diagnostic groups. The angulation between the Frankfort horizontal plane and the posterior slope of the articular eminence, as well as the width and depth of the glenoid fossa and the articular tuberculum, were automatically measured with the aid of a computer.
The Mann-Whitney U test demonstrated significant differences in the angular and linear values obtained in disk displacement with reduction patients in comparison with the values obtained in patients with disk displacement without reduction and in symptom-free volunteers.
It is proposed that a steeper posterior slope and higher tuberculum articulaire are predisposing factors for the development of disk displacement with reduction. Flattening of the eminence may progress in time, leading to the onset of disk displacement without reduction.
本研究旨在评估颞下颌关节形态，并比较有症状的前盘移位患者颞下颌关节解剖结构的可能结构变异与无症状志愿者颞下颌关节解剖结构的可能结构变异。
本研究纳入了56名有症状的患者和25名无症状的志愿者。所有受试者均在矢状位（闭口和开口）进行了双侧高分辨率磁共振成像扫描。利用这些图像评估盘位置，并将患者相应地分为4个诊断组。借助计算机自动测量法兰克福水平面与关节结节后斜面之间的角度，以及关节窝和关节结节的宽度和深度。
曼-惠特尼U检验表明，与不可复性盘移位患者和无症状志愿者相比，可复性盘移位患者获得的角度和线性值存在显著差异。
有人提出，较陡的后斜面和较高的关节结节是可复性盘移位发生的易感因素。关节结节的变平可能会随着时间的推移而进展，导致不可复性盘移位的发生。
