Sümnig W, Bartolain G, Fanghänel J
Klinik und Poliklinik für Kiefer-Gesichts-Chirurgie, Medizinischen Fakultät, Ernst-Moritz-Arndt-Universität Greifswald, BRD.
Anat Anz. 1991;173(5):279-86.
The biomechanical process which lead to the development of cracking sounds in the temporomandibular joints have received contradictory treatment in the literature. Most of the authors regard consider the cracking sounds to be caused by mechanical friction produced in translational movements of the condylus. According to this hypothesis the discus articularis which is dislocated in an anterior direction active pulling of the lateral pterygoid muscle, is regarded as being a mechanical obstacle. The morphological relationships however, between the lateral pterygoid muscle and the discus articularis are unclear. Our histomorphological investigations of 16 human temporomandibular joint samples from fresh cadavers of victims of accidental death revealed evidence that in the majority of cases a tendon connected the upper head of the lateral pterygoid muscle with the discus articularis. This would suggest that an anterior dislocation of the discus, resulting from an active pulling movement of the lateral pterygoid muscle, cannot be ruled out as a possible morphological cause for cracking sounds.
导致颞下颌关节出现弹响的生物力学过程在文献中受到了相互矛盾的论述。大多数作者认为，弹响是由髁突平移运动中产生的机械摩擦引起的。根据这一假说，因翼外肌主动牵拉而向前移位的关节盘被视为一个机械障碍。然而，翼外肌与关节盘之间的形态学关系尚不清楚。我们对16例意外死亡受害者新鲜尸体的人类颞下颌关节样本进行了组织形态学研究，结果表明，在大多数情况下，一条肌腱将翼外肌上头与关节盘相连。这表明，翼外肌主动牵拉运动导致关节盘向前移位，作为弹响可能的形态学原因不能排除。
