Liu H C
Stomatology Department, General Hospital of Chinese PLA, Beijing.
Zhonghua Kou Qiang Yi Xue Za Zhi. 1993 Jan;28(1):44-6, 64.
Bilateral TMJ of 7 edentulous patients were studied by CT in two positions. One position was to make the complete dentures in intercuspal position (ICP) while the other one was to make the edentulous jaws in closed position. Two of them MRI examination was made. It is discovered that the condyles move backward and upward in the glenoid fossa. The displacement of the disc in edentulous closed position is less in comparison with ICP. It is proposed that loss of vertical dimension such as abrasion and loss of dentition may press the disc anteriorly as a result of condyle displacement which it is a causal factor of TMJDS.
对7例无牙颌患者的双侧颞下颌关节在两个位置进行了CT研究。一个位置是在牙尖交错位（ICP）制作全口义齿，另一个位置是使无牙颌处于闭口位。其中2例进行了MRI检查。发现髁突在关节窝内向后上方移动。与牙尖交错位相比，无牙颌闭口位时盘的移位较小。有人提出，垂直距离丧失如磨损和牙列缺失可能由于髁突移位而向前压迫关节盘，这是颞下颌关节紊乱病的一个病因。
