Scapino R P, Canham P B, Finlay H M, Mills D K
University of Illinois, College of Dentistry, Chicago, USA.
Arch Oral Biol. 1996 Nov;41(11):1039-52. doi: 10.1016/s0003-9969(96)00079-9.
The physical properties of the temporomandibular joint disc are largely attributable to its collagen fibre and proteoglycan composition and organization. Structural and stress relaxation data were obtained from the discs of six rabbits. Two stainless-steel balls, 4.8 mm dia, were used to load the disc surfaces in compression. Stress relaxation tests were performed at loads of 0.8-1.4 kg, and the disc was then placed in fixative while still in the loading apparatus in order to preserve its deformed state at equilibrium stress. After overnight fixation the discs were sectioned and assessed by means of a polarizing microscope with a rotating universal stage. This allowed measurement of three-dimensional changes in collagen fibre waviness and alignment as the result of loading. The data showed that despite significant stress relaxation and strains, only minor changes in fibre waviness and alignment occurred within the disc, reflecting its effectiveness as a tough but compliant structure, well suited to distribute load in the temporomandibular joint.
颞下颌关节盘的物理特性很大程度上归因于其胶原纤维和蛋白聚糖的组成及结构。从六只兔子的关节盘中获取了结构和应力松弛数据。使用两个直径为4.8毫米的不锈钢球对关节盘表面进行压缩加载。在0.8 - 1.4千克的载荷下进行应力松弛测试，然后将关节盘在仍处于加载装置的状态下放入固定剂中，以保持其在平衡应力下的变形状态。经过过夜固定后，将关节盘切片，并通过带有旋转通用载物台的偏光显微镜进行评估。这使得能够测量加载导致的胶原纤维波纹度和排列的三维变化。数据表明，尽管存在显著的应力松弛和应变，但关节盘内的纤维波纹度和排列仅发生了微小变化，这反映出它作为一种坚韧但柔顺的结构的有效性，非常适合在颞下颌关节中分散负荷。
