Fibrous Component of the Temporomandibular Joint Disk

Abstract
This article describes the spatial arrangement of collagen fibrils in the articular disk of the normal human temporomandibular joint (TMJ). Disks obtained at necropsy were examined by light microscopy and scanning electron microscopy. Observations by light microscopy showed dense cartilaginous tissue composed of collagen fiber bundles running in all directions. Observations by scanning electron microscopy revealed a network of collagen fibrils which were predominantly organized in bundles. In the surface layers an anteroposterior orientation was detectable. The authors concluded that the fibrous component of the TMJ articular disk is composed of collagen fibrils, organized in a three-dimensional network and able to resist compression forces due to loading.