This is a case report of a 19 year old adult female with facial asymmetry secondary to right Temporomandibular Joint (TMJ) ankylosis with a history of previous surgery at the age of 10 years with gap arthroplasty for tmj ankylosis which was unsuccessful and lead to relapse .Because of decreased mouth opening and facial disfigurement patient was not able to have a quality life. She reported to our department where she got operated simultaneously for tmj ankylosis with interpositional arthroplasty using temporalis myofascial flap and novel osteotomy technique for correction of chin asymmetry. After surgery there is a significant improvement in patient both functionally and aesthetically.