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目的为探讨骨性和功能性Ⅲ类错与颞下颌关节紊乱病之间的关系。方法利用矫正薛氏位片对Ⅲ类骨性错19人，功能性错20人的双侧颞下颌关节的髁突居关节窝的位置进行评价，并依据髁突居关节窝中的位置（前移、居中、后移），从上述两类错中各选5人做双侧颞下颌关节矢状位核磁共振扫描，观察关节盘的位置及形态变化。结果每一类型错髁突居关节窝中的位置并不一致，但位置分布比较集中，Ⅲ类骨性和功能性错髁突明星居关节窝前位，当髁突居前位或中位时，关节盘位置在正常范围且形态为正常的双凹形，髁突居后位时，关节盘位置在正常范围或轻度前移，形态也都表现正常。结论Ⅲ类骨性和功能性错颞下颌关节结构基本正常，与颞下颌关节紊乱病关系不密切。
Objective To investigate the relationship between skeletal and functional class Ⅲ errors and temporomandibular disorders. Methods The position of the condyles of the bilateral temporomandibular joint in 19 patients with type Ⅲ bony spur and 19 patients with functional fault in 20 patients was evaluated by means of orthodontic treatment. According to the position of the condylar fossa in the fossa fossa Shift, center, after the shift), from the above two kinds of mistakes in each of five people to do bilateral temporomandibular joint sagittal MRI scan to observe the location and shape of the disc changes. Results The location of each type of wrong condyles in the socket was not consistent, but the distribution of location was more concentrated. The type Ⅲ bony and functional wrong condyles were in front of the socket. When the condyle was in the front or middle position, The position of the articular disc in the normal range and the shape of the normal biconcave, condyle posterior position, the disc position in the normal range or slightly advanced, the shape also showed normal. Conclusion Class Ⅲ bony and functional abnormal temporomandibular joint structure is basically normal, which is not closely related to temporomandibular disorder.