Department of Orthodontics, Faculty of Dentistry, University Central of Venezuela, Caracas, Venezuela.
Department of Oral Radiology, Clinic Felix Boada, Caracas, Venezuela.
J Oral Rehabil. 2020 Jun;47(6):743-749. doi: 10.1111/joor.12962. Epub 2020 Apr 24.
Temporomandibular joint disc displacement is common in the world's population and could be associated with bone and functional characteristics of the temporomandibular joint. The aim of these study was to analyse the association between temporomandibular joint disc position evaluated by magnetic resonance imaging (MRI) and the inclination of the mandibular condyle evaluated by computed tomography (CT). One hundred and seventy temporomandibular joints (TMJ) were retrospectively analysed. The temporomandibular disc position was evaluated by MRI and classified into three types: normal (N), disc displacement with reduction (DDWR) and disc displacement without reduction (DDWoR). The mandibular condyle measurements evaluated by CT included horizontal, sagittal and coronal inclination. ANOVA followed by post hoc Tukey's test was used to evaluate the interaction between condylar inclination and disc position. There was an association between disc position and the horizontal and sagittal condylar inclination (P < .05). There are statistically significant differences in the mean of horizontal and sagittal inclination of the mandibular condyle between the DDWoR and the other disc positions (P = .002 and P = .004). Disc position was not statistical associated with coronal inclination of condyle (P > .05). These results indicate that the inclination of the mandibular condyle may be different in TMJ with various disc position. A more medial horizontal inclination and a more posterior sagittal inclination of the mandibular condyle are associated with DDWoR.
颞下颌关节盘移位在世界人群中很常见，可能与颞下颌关节的骨骼和功能特征有关。本研究旨在分析磁共振成像（MRI）评估的颞下颌关节盘位置与计算机断层扫描（CT）评估的下颌髁突倾斜之间的关系。回顾性分析了 170 个颞下颌关节（TMJ）。通过 MRI 评估颞下颌关节盘位置，并将其分为三种类型：正常（N）、关节盘可复性前移位（DDWR）和关节盘不可复性前移位（DDWoR）。通过 CT 评估的下颌髁突测量包括水平、矢状和冠状倾斜。采用方差分析（ANOVA）后进行 Tukey 事后检验，以评估髁突倾斜与关节盘位置之间的相互作用。关节盘位置与水平和矢状髁突倾斜之间存在关联（P<.05）。DDWoR 与其他关节盘位置之间，下颌髁突的水平和矢状倾斜的平均值存在统计学差异（P=.002 和 P=.004）。关节盘位置与髁突冠状倾斜无统计学关联（P>.05）。这些结果表明，不同关节盘位置的 TMJ 中，下颌髁突的倾斜度可能不同。DDWoR 与下颌髁突更内侧的水平倾斜和更向后的矢状倾斜相关。
