PURPOSE: This study examined the ultrastructural characteristics of adhesions in the upper joint compartment of @entity1348 ( @entity1348 ). MATERIALS AND METHODS: Tissue biopsy specimens of adhesions were obtained during arthroscopic operation on 36 joints in 22 @entity1 with internal derangement (ID). The biopsy specimens were examined by light and transmission electron microscopy. RESULTS: Adhesions were grossly divided into two types based on arthroscopic observation: 1) a band-like type, which connected the articular fossa and @entity1348 disc, and 2) a pseudowall-like type, which faced the synovial fluid and was lined by articular tissue. Two types of collagen arrangement were observed at the electron microscopic level: orderly arranged collagen bundles and randomly arranged collagen bundles. Orderly arranged collagen bundles were prominent in the band-like adhesions. In @entity1104 , mainly the randomly arranged collagen bundles were seen. However, in some dense fiber parts, orderly arranged collagen bundles also were observed. In other @entity1104 , only orderly arranged collagen bundles were seen. Elastic fibers were abundant in some @entity1104 with randomly arranged collagen bundles. There were no elastic fibers in the band-like adhesions, some dense fiber parts of the pseudowall-like adhesion, @entity1104 consisting of only orderly arranged collagen bundles, and in the synovial membrane. CONCLUSION: The different arrangement of collagen fibers and presence or absence of elastic fibers were observed in the two types of adhesions. These findings served to show that extracellular components correspond to a dysfunction involving an ID of @entity1348 .

Ultrastructural study on adhesions in internal derangement of the XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1104 :: ('MESH:D000267', 'Disease') :: ['pseudowall-like adhesions'] @entity1348 :: ('MESH:D013706', 'Disease') :: ['TMJ', 'temporomandibular joint']
@entity1348 :: (MESH:D013706,Disease) :: ['temporomandibular joint']
