Relationship of computed tomography-verified degenerative condylar morphology with temporomandibular joint disk displacement and sex.

OBJECTIVE

This study investigated the association of computed tomography (CT)-verified degenerative condylar changes with disk displacement (DD) and sex.

STUDY

DESIGN

Multidetector CT and cone beam CT scans of 165 condyles were evaluated for erosion, osteophyte formation, flattening, subcortical sclerosis, generalized sclerosis, subcortical defects, and loose joint bodies. Disk position was determined using magnetic resonance imaging. The association of degenerative alterations with disk position and sex was analyzed.

RESULTS

The risks of erosion, osteophyte formation, and flattening were significantly increased by 3.72, 9.00, and 6.35 times, respectively, in the joints with DD without reduction (DDNR); however, the risks of these changes did not increase significantly in joints with DD with reduction. The risks of extensive erosion and slight and moderate osteophyte formation significantly increased only in the joints with DDNR. The degenerative changes were more likely to exist together in the joints with DDNR than in those with a normal disk position. The association of DD and most degenerative morphologies was not significantly influenced by sex.

CONCLUSIONS

Erosion, osteophyte formation, and flattening were significantly associated with DDNR, regardless of sex.