Werner J A, Tillmann B, Schleicher A
Department of Otolaryngology, University of Kiel, Federal Republic of Germany.
Anat Embryol (Berl). 1991;183(1):89-95. doi: 10.1007/BF00185839.
A study of 72 temporomandibular joints of adults without any gross signs of degenerative changes was made, in order to analyse the stress on individual regions of the joint, and to determine the path of the split line pattern in the articular cartilage. The cancellous architecture and the material distribution in the juxta-articular bone were also investigated. Zones of high-density compact substance in the lateral region of the joint, and the presence of attractive singular points in the split line orientation in this localization, suggest great stress on the lateral part of the temporomandibular joint. This increased stress in the lateral region is confirmed by the fact that arthrotic changes in the temporomandibular joint first almost always appear laterally. Degenerative changes usually originate at the articular disc, affect the articular tubercle after a delay, and finally spread to the condyle. Besides the greater physiological, mechanical stress on the lateral region of the joint, the force acting on every individual temporomandibular joint is influenced by the dental condition. The molars and bicuspids serving as a support zone play a decisive role in this context.
对72个无任何明显退行性改变体征的成人颞下颌关节进行了研究，以分析关节各个区域的应力，并确定关节软骨中分裂线模式的路径。还研究了关节周围骨的松质结构和物质分布。关节外侧区域高密度致密物质带以及该区域分裂线方向上存在引人注目的奇异点，表明颞下颌关节外侧部分承受着巨大应力。颞下颌关节的关节病变几乎总是首先出现在外侧这一事实证实了外侧区域这种增加的应力。退行性改变通常始于关节盘，延迟后影响关节结节，最终蔓延至髁突。除了关节外侧区域更大的生理、机械应力外，作用于每个颞下颌关节的力还受牙齿状况的影响。在此背景下，作为支撑区的磨牙和双尖牙起着决定性作用。
