Evaluation of Using Patient Specific Zirconium Dioxide Implant Versus Patient Specific Titanium Implant in Treatment of Chronic Condylar Dislocation

Inclusion Criteria: * Patient with recurrent dislocation with maximum inter incisal opening over 55mm * Long-standing dislocation of the TMJ involving both fixation for more than 3 weeks and the failure of manual reduction * Failure of conservative strategies such as orientation to self-limit jaw movement and the use of a chin-cap or bandage * Both sexes * Age between 18 and 48 years. * Highly motivated patients. Exclusion Criteria: * 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