Degenerative joint disease in the temporomandibular joint with fibrous ankylosis in a rhesus macaque (Macaca mulatta)

摘要

Images of the teeth and radiographic and computed tomographic images of the temporomandibular joint (TMJ). a The labial portion of the canine tooth (red ellipse line) in the left maxilla is worn down by the opposite portion in the left mandible. b The jaw is maximally opened, but locking occurs between the left canine teeth. c After crown reduction of the canine teeth was performed, the jaw could be opened to a greater extent than shown in (b). However, normal mouth opening was not performed (maximum 2 cm). d The left TMJ shows a more prominent irregular joint surface than does the right TMJ on the anterior-posterior view. e & f The joint space widening and joint surface irregularity are more severe in the left TMJ than in the right TMJ on the left and right oblique views. The blue ellipse lines indicate the left and right TMJs. g The joint space widening and joint surface irregularity are more severe in the left TMJ than in the right TMJ. h TMJ image of a normal rhesus monkey