Santos Karina Cecília Panelli, Dutra Marcelo Eduardo Pereira, Warmling Luiza Veronica, Oliveira Jefferson Xavier
Discipline of Dental Radiology, Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
J Oral Maxillofac Surg. 2013 Sep;71(9):1504-12. doi: 10.1016/j.joms.2013.04.033.
The objective was to assess possible correlations among the anatomy and position of the articular disc, the morphology of the articular eminence and of the condyle, and the presence of joint effusion.
Magnetic resonance images of 142 joints of symptomatic patients were assessed. The articular disc was classified as normal, elongated, or folded; displacement was classified as normal, anterior with reduction, anterior without reduction, or posterior, lateral, or medial; the condyle was classified as rounded, convex, flattened, or angulated; and the articular eminence was classified as box, sigmoid, flattened, or deformed.
The most frequent forms of the articular disc, articular eminence, and condyle were normal, box, and flattened, respectively. Associations were confirmed between the form of the articular disc and its anterior and lateral positions; between the form of the condyle and an anterior position of the disc; and between the form of the articular eminence and the form of the disc. The form of the articular eminence was the only variant that was not associated to the presence of joint effusion.
Magnetic resonance imaging allowed the clear observation of articular structures, without attributing a cause-and-effect relation. The prevalence of changes observed was associated with the diagnosis of internal derangement and was statistically proved.
评估关节盘的解剖结构与位置、关节结节和髁突的形态以及关节积液的存在之间可能的相关性。
对142例有症状患者的关节进行磁共振成像评估。关节盘分为正常、拉长或折叠；移位分为正常、可复性前移位、不可复性前移位或后移位、侧方移位或内侧移位；髁突分为圆形、凸形、扁平形或有角形；关节结节分为盒形、乙状形、扁平形或变形。
关节盘、关节结节和髁突最常见的形态分别为正常、盒形和扁平形。证实了关节盘的形态与其前位和侧方位置之间、髁突的形态与关节盘的前位之间以及关节结节的形态与关节盘的形态之间存在关联。关节结节的形态是唯一与关节积液的存在无关的变量。
磁共振成像能够清晰观察关节结构，但未确定因果关系。观察到的变化发生率与内部紊乱的诊断相关且经统计学证实。
