Evaluation of Using Patient Specific Ultra-High Molecular Weight Polyethylene Implant Versus Patient Specific Titanium Implant in Treatment of Chronic Condylar Dislocation A Randomized Control Trial

Does patient specific Ultra-High Molecular Weight Polyethylene implant eminoplasty will decrease maximum interincisal distance, provide better soft tissue response and post-operative patient satisfaction than patient specific Titanium eminoplasty in treatment of chronic condylar dislocation?

Inclusion Criteria: * patients with recurrent dislocation with their maximum inter incisal opening over 55mm * longstanding dislocation of the TMJ involving both fixation for more than 3weeks and the failure of manual reduction * failure of conservative strategies such as orientation to self-limiting jaw movement and the use of chin-cap or bandage Exclusion Criteria: * patients with post-menopausal females with osteoporosis * Patient with uncontrolled systemic disease * pregnancy * psychological disorders, drug or alcohol dependency * Known allergies or sensitivities to dental materials, including Zirconia, Titanium or general anesthetic agents * Inability to return for follow up visits. * Refusal of participation from the patient