Liedberg J, Westesson P L
Department of Oral Radiology, University of Lund, School of Dentistry, Malmö, Sweden.
Oral Surg Oral Med Oral Pathol. 1988 Dec;66(6):644-9. doi: 10.1016/0030-4220(88)90309-x.
Forty-five fresh temporomandibular joint autopsy specimens from elderly persons were studied with respect to the position of the disk in the sagittal and coronal planes. In the sagittal plane 80% of the joints showed superior disk position and 20% showed anterior disk position. In the coronal plane 62% showed superior disk position, 33% showed medial disk position, and 4% showed lateral disk position. There were no statistically significant associations between disk positions in the sagittal and coronal planes. The vertical distance from the central part of the condyle to the fossa was measured in the coronal sections and was smaller in joints with medial disk position than in joints with superior disk position. It was concluded that medial disk position is relatively frequent in elderly persons and that this condition might represent a variant of temporomandibular joint internal derangement.
对45例来自老年人的新鲜颞下颌关节尸检标本进行了研究，观察关节盘在矢状面和冠状面的位置。在矢状面，80%的关节显示关节盘位置上移，20%显示关节盘位置前移。在冠状面，62%显示关节盘位置上移，33%显示关节盘位置内移，4%显示关节盘位置外移。矢状面和冠状面的关节盘位置之间无统计学显著关联。在冠状面切片中测量了髁突中心至关节窝的垂直距离，关节盘位置内移的关节该距离小于关节盘位置上移的关节。研究得出结论，关节盘位置内移在老年人中相对常见，这种情况可能是颞下颌关节内紊乱的一种变体。
