The short-term effect of discectomy on the osteoarthrotic temporomandibular joint in sheep.
The short-term effect of discectomy on osteoarthrotic joints was tested experimentally in sheep. Bilateral temporomandibular joint (TMJ) osteoarthrosis was induced, and at 3 months discectomy was performed on one joint, with the other being left as a control. Neither masticatory nor mouth-opening disturbances had been found after discectomy. The animals were killed at 6 months, and the TMJs were removed, fixed, and assessed radiologically, macroscopically, and histologically. The control joints showed ongoing degenerative changes consistent with previous reports. The discectomy joints showed marked fibrous repair with joint surface remodelling rather than ongoing degeneration. This result is consistent with the clinical findings after discectomy for osteoarthrotic joints.
Second Department of Oral and Maxillofacial Surgery, Aichi-Gakuin University School of Dentistry, Nagoya, Japan.
N
N
Ogi
K
K
Kurita
Y
Y
Handa
A N
AN
Goss
D000818:Animals; D001178:Arthroplasty / Q000009:adverse effects; D016723:Bone Remodeling; D005355:Fibrosis / Q000209:etiology; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000473:pathology; D010003:Osteoarthritis / Q000601:surgery*; D011859:Radiography; D012756:Sheep; D013704:Temporomandibular Joint / Q000000981:diagnostic imaging / Q000473:pathology; D019224:Temporomandibular Joint Disc / Q000601:surgery*; D013705:Temporomandibular Joint Disorders / Q000601:surgery*; D014945:Wound Healing