Autogenous Dentin Derived Barrier Membrane Versus Collagen Membrane

Inclusion Criteria: 1. Patient's age ranges from 18-50 years. 2. Adequate inter-arch relation and inter-occlusal space that could accommodate the implant abutment and the future restoration 3. Non-restorable tooth that needs dental extraction \& guided bone regeneration for immediate implant. 4. Presence of alveolar bone defect with vertical loss of buccal bone more than a third implant thread. 5. Co-operative patients willing to complete the follow-up periods. Exclusion Criteria: 1. Any pathological condition at site of surgery. 2. Patients with systemic diseases that contra-indicate the surgical procedure. 3. Heavy smoking. 4. Parafunctional habits such as bruxism and clenching. 5. Pregnant patients. -