Pathological changes of the rat temporomandibular joint synovia on condylar hypermobility

Electron microscopic study

Abstract

The histologic effect of trauma to the rat temporomandibular joint synovial membrane was investigated electron-microscopically. Trauma to TMJ was introduced by repeated condylar hypermobility. The results were as follows;
(1) Early reactions in the synovial membrane were A cell loss and fibrin deposits on the synovial surfaces.
(2) During its course the collagen fibers were exposed on the synovial surfaces.
(3) In the late stage (4-6 weeks after trauma), the fibrosis of synovial tissue stood out through the synovial surface and subsynovial tissue.