Rohlin M, Hallberg E, Näsström K, Ostrowska S
Department of Oral Radiology, Lund University, Sweden.
Scand J Dent Res. 1993 Jun;101(3):145-53. doi: 10.1111/j.1600-0722.1993.tb01654.x.
The aim was to study the ultrastructure of the surface of the temporomandibular joint (TMJ) in mature rats. The TMJs from control rats and rats given corticosteroids for 10 days or 38 days were examined. In three joints from the control rats the disk was detached from the condyle before preparation and analysis. Scanning electron microscopy was performed on the condyle, the disk, and the temporal component. Generally, the surface of the three components was predominantly smooth, although the condyle exhibited a more even surface than the disk and the temporal component. In the fossa a pitted or ridged appearance was observed in some areas. There was a striking difference between the surface structure of disks attached to, and that of disks detached from, the condyle during preparation. A prominent undulation of surface was evident in disks detached from the condyle. Below the surface layer of the articular cartilage, a network of collagen fibers and fibrils running in all directions could be observed in all three components. In limited areas there was fibrillation and shallow defects of the surface layer. These changes were seen in all rats given corticosteroids for 38 days but also in some rats given corticosteroids for 10 days and in a few control rats.
目的是研究成熟大鼠颞下颌关节（TMJ）表面的超微结构。对来自对照大鼠以及接受皮质类固醇治疗10天或38天的大鼠的颞下颌关节进行了检查。在来自对照大鼠的三个关节中，在制备和分析之前，盘从髁突分离。对髁突、盘和颞部成分进行了扫描电子显微镜检查。一般来说，这三个成分的表面主要是光滑的，尽管髁突的表面比盘和颞部成分更均匀。在窝中，在一些区域观察到有凹坑或脊状外观。在制备过程中，附着于髁突的盘和从髁突分离的盘的表面结构存在显著差异。从髁突分离的盘中，表面有明显的起伏。在所有三个成分的关节软骨表层下方，可以观察到向各个方向延伸的胶原纤维和原纤维网络。在有限的区域，表层有原纤维形成和浅的缺损。这些变化在所有接受38天皮质类固醇治疗的大鼠中都可见，但在一些接受10天皮质类固醇治疗的大鼠和少数对照大鼠中也可见。
