Middle part of main portion (MMP) of temporal muscle as interpositional material in the treatment of temporomandibular joint ankylosis

Introduction: This study was conducted to determine the efficacy of interpositional arthroplasty using the middle part of main portion (MMP) of temporal muscle as interpositional material in the treatment of temporomandibular joint (TMJ) ankylosis. Materials and Methods: This study of ten cases evaluated the postoperative results of interpositional arthroplasty with MMP of temporal muscle in treatment of unilateral and bilateral TMJ ankylosis. Resection of ankylotic mass with coronoidectomy when deemed necessary was done. Interpositional transfer of the MMP of temporal muscle flap was done followed by early mobilization and aggressive physiotherapy. Results: The study evaluated ten patients with follow-up checks from 03 to 31 months (mean 17 months). Patients had a preoperative maximal interincisal opening of 0–19 mm (mean 9.5 mm). During the last follow-up observation after surgery, the patients had a maximal interincisal opening of 25–40 mm (mean 32.5 mm).The results of this protocol were encouraging; the functional results of interpositional arthroplasty with MMP of temporal muscle were also satisfactory. Conclusion: The findings of this study support the use of MMP of temporal muscle flap in patients with TMJ ankylosis. Early postoperative initial exercise, physiotherapy and strict follow-up play an important role in preventing postoperative recurrences.