Arthroscopic Lysis and Lavage With and Without Intra-articular Injection of Hyaluronic Acid in Patients With DDwoR in TMJ

Inclusion Criteria: 1. Adults above 18 years old. 2. Diagnosis of Disc Displacement Without Reduction (DDWOR) with limited mouth : eitherunilateral or bilateral based on the DC/TMD and confirmed with MRI 3. History of unsuccessful conservative treatment such as physical therapy, occlusal splints,or medications (e.g., NSAIDs, muscle relaxants) for at least 3 months. 4. Patients must sign the informed consent, understand the study procedures and potential risks, accept to volunteer in the study and be available to attend the follow-up visits. Exclusion Criteria: 1. Degenerative Temporomandibular Joint Disorders (e.g., osteoarthritis, rheumatoid arthritis). 2. History of prior TMJ surgery (e.g., joint replacement, previous arthroscopy). 3. Severe Systemic Conditions (e.g., cardiovascular disease, autoimmune disorders, uncontrolled diabetes). 4. Active joint infection, acute inflammation, or presence of any condition that may increase the risk of complications from arthroscopic surgery or injections (e.g., local infection, uncontrolled bleeding disorders). 5. Pregnancy or Breastfeeding. 6. Patients with severe Psychological Conditions (e.g., severe depression, psychosis, myofascial pain disorder) or dental related pain will be identified at the initial assessment and referred for appropriate psychological, behavioural, or dental management prior to inclusion in the study.