翼外肌上头与颞下颌关节盘关系的研究

目的探讨翼外肌上头与关节盘的关系。方法对４７侧老年尸体颞下颌关节标本进行了斜矢状面上的解剖学和组织学研究。结果①显微镜下观察翼外肌上头纤维可附着于关节盘、关节囊、关节盘前附着及髁突；②翼外肌上头附着于髁突的纤维平均为５２％，附着于关节盘的纤维为１０％，附着于关节囊的纤维为２４％，附着于下颌前附着的纤维量为４％；③翼外肌上头附着于关节盘的比例与关节盘前移无确切相关性；④翼外肌上头纤维与关节盘纤维的连接方式包括结点连接、肌腱连接和端端连接。结论翼外肌上头主要附着于髁突，附着于关节盘的少量纤维不足以独立地使关节盘发生前移位。

A macroscopic and microscopic study of the relationship between the superior lateral pterygoid muscle and the disc of the temporomandibular joint

Objective To find out the relationship between the superior lateral pterygoid muscle (SLP) and the disc of the temporomandibular joint.Methods The cadavers consisted of 47 TMJ specimens from old humans, were used for the macroscopic and microscopic study.Results (1) The SLP may insert to the disc, the capsule, the anterior discal attachment of TMJ and to the condyle; (2) On average, 52% of the SLP fibres insert to the condyle, 10% to the articular disc, 24% to the capsule and 14% to the anterior attachment of the disc; (3) There is no association between displacement of disc and the proportion of the SLP insert to the disc; (4) The SLP fibres are jointed into the disc fibres by node or tendon, or jointed and to end.Conclusion The majority of the SLP inserts to the condyle and the contraction of the little part of the SLP, which insert to the disc, should not result in the anterior displacement of the disc.