【摘要】 颞下颌关节是人体最为复杂、精细的关节之一 ,具有负重的功能。关节软骨是具有低渗透性的多孔粘弹性介质 ,生理状态下在软骨内部存在胶原 -蛋白多糖 -水凝胶网状结构应力缓冲系统。关节盘是特殊类型的结缔组织 ,不属纤维软骨 ,是髁突和关节窝之间的应力集中缓冲器。关节盘后组织具有高度的顺应性 ,在关节运动中发挥容积补偿作用 ,关节外侧壁是囊 -韧带结构的复合体 ,拉伸强度和拉伸刚度较弱 ,长期的口腔副功能易使结构处于超负荷状态 ,造成关节劳损。更多还原

【Abstract】 Temporomandibular joint (TMJ) is one of the most intricate and complicate loading joints in the human body. Articular cartilage is characteristic of low infiltrative, porous viscoelastic material. In physiological condition, there is a stress absorbing architecture system in the TMJ cartilage, which consists of collagen proteoglycan water gel network.TMJ disc is a specific connective tissue as stress concentration absorber between condyle and articular fossa, but it does not belong to fibrocartilage. Retrodiscal tissue has high compliance of which the role is to play volume compensating mechanism in joint movement. Lateral wall is a complexed structure out of ligament and capsule with weak tensile strength and tensile rigidity. Therefore, prolonged oral parafunction will result in joint fatigue and failure.更多还原