背景:颞下颌关节(TMJ)盘前移位是TMJ疾病的最典型病理状态。附接到关节盘的结构可以在各个方向上支撑盘并且有助于稳定TMJ。然而,关节盘之间的关系,胶囊,咀嚼肌仍不清楚。因此,本研究旨在阐明咀嚼肌之间的关系,相关咀嚼筋膜,关节盘,和胶囊。
方法:我们检查了日本成年尸体的10对半,对五个半部进行宏观分析,其余五个进行组织学分析。从外侧解剖TMJ进行大体解剖分析。对于组织学分析,在冠状部分观察到颞部和咬肌筋膜与关节囊之间的关系。此外,我们评估了光盘之间的关系,胶囊,颞筋膜,使用磁共振成像对10名活着和健康的志愿者进行了咬筋膜。
结果:关节盘附着在囊膜上,没有清晰的边界。囊继续进入咬肌和颞筋膜。因此,关节盘,胶囊,按摩师,和颞叶筋膜被认为是一个单一的复合体。
结论:颞肌的单个复合体,咬肌,胶囊,咀嚼筋膜,椎间盘可以通过筋膜对抗后外侧方向的力。
BACKGROUND: Anterior displacement of the temporomandibular joint (TMJ) disc is the most typical pathological condition of TMJ disorders. Structures attached to the articular disc may support the disc in various directions and contribute to stabilizing the TMJ. However, the relationship between the articular disc, capsule, and masticatory muscles remains unclear. Therefore, this study aimed to clarify the relationship between the masticatory muscles, related masticatory fascia, articular disc, and capsule.
METHODS: We examined 10 halves from adult Japanese cadavers, with five halves macroscopically analyzed and the remaining five histologically analyzed. The TMJ was dissected from the lateral aspect for gross anatomical analysis. For histological analysis, the relationship between the temporal and masseteric fasciae and the articular capsule was observed in the coronal section. Additionally, we evaluated relationships among the disc, capsule, temporal fascia, and masseteric fascia in 10 living and healthy volunteers using magnetic resonance imaging.
RESULTS: The articular disc was attached to the capsule without a clear border. The capsule continued into the masseteric and temporal fasciae. Consequently, the articular disc, capsule, masseteric, and temporal fasciae were considered a single complex.
CONCLUSIONS: The single complex of the
temporalis, masseter, capsule, masticatory fascia, and disc may antagonize the force in the posterolateral direction through the fascia.