RESUMEN
Objective: To evaluate the short-term effect of modified temporomandibular joint disc anchor for irreversible disc displacement of temporomandibular joint (TMJ). Methods: A modified temporomandibular joint disc anchor surgery was performed for 24 patients with stage Ⅲ-Ⅴ TMJ internal derangement (ID) of 30 TMJs. Magnetic resonance imaging (MRI) were used to evaluate ID before and 1 week after operation for all patients. Results: All incisions healed well and there was no severe complication. The postoperative MRI images showed that, the operation outcome of 26 joints (21 cases) was classified as excellent and 3 joints (2 cases) was good. Maximal interincial opening increased from(23. 63 ± 3. 31) mm before operation to (32. 17 ± 2. 30) mm 7 days after operation(P＜ 0. 05). Conclusion: Modified temporomandibular joint disc anchor surgery may produce good short-term effects for the treatment of TMJ ID.