Assistant Professor, Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, Tokyo, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 Nov;116(5):626-32. doi: 10.1016/j.oooo.2013.06.028. Epub 2013 Sep 4.
To evaluate whether morphological discrepancy between the mandibular condyle and fossa of the temporomandibular joint (TMJ) is related to disk displacement on magnetic resonance imaging (MRI).
This study included 61 patients with unilateral internal derangement based on both MRI and clinical examination. Coronal morphologies of the condyle and fossa were divided into four groups based on Öberg's classification. According to the coronal morphology of the condyle and fossa, all joints were dichotomized into either harmonized group or a discrepancy group (e.g., angled condyle and concave fossa). The incidence of discrepancy and the relationship of the discrepancy to other findings on MRI were statistically evaluated.
The discrepancy had a significantly higher incidence on the affected side. The discrepancy correlated with incidence of disk deformity on the affected side.
Morphological discrepancy between the condyle and fossa is related to development of anterior disk displacement in the TMJ.
评估颞下颌关节（TMJ）髁突和关节窝的形态差异是否与磁共振成像（MRI）上的盘移位有关。
本研究纳入了 61 例基于 MRI 和临床检查的单侧内部紊乱患者。根据Öberg 分类，将髁突和关节窝的冠状形态分为四组。根据髁突和关节窝的冠状形态，所有关节均分为协调组或差异组（例如，倾斜髁突和凹陷关节窝）。统计评估了差异的发生率以及差异与 MRI 上其他发现的关系。
差异在患侧的发生率明显更高。差异与患侧盘畸形的发生率相关。
髁突和关节窝之间的形态差异与 TMJ 前盘移位的发展有关。
