Forty patients will be selected from the outpatient's clinic of Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Mansoura University for replacement of non-restorable tooth in posterior mandibular area with immediate implants.

Eligibility Criteria:

1. Patients aged 18 years and older.
2. Non-restorable mandibular molars requiring extraction and GBR for immediate implant placement.
3. The tooth that required extraction showed no clinical or radiographic signs of acute infection.
4. There was at least 5 mm of available bone between the superior border of the inferior alveolar canal and the root apex.
5. At least 8 mm inter-arch space for the prosthesis.
6. Patients were free of systemic conditions that absolutely contraindicate implant insertion.
7. Patients with good oral hygiene.
8. Patients capable of adhering to the mandated follow-up appointments.

Exclusion Criteria:

1. Tobacco Smokers.
2. Pregnancy.
3. Patients with a history of radiation to the head and neck.
4. Bruxism and parafunctional habits