Comparing amount of horizontal bone gain 4 months after alveolar ridge augmentation using IPRF Nano- micro Sticky Bone with perforated collagen membrane versus occlusive barrier membrane by :

1. clinical and Radiographic analysis .
2. Histomorphometric analysis .

Inclusion Criteria:

1. Healthy adult patients.
2. Both sex, males and females. 3-Age from 20 - 40 years old. 4-All patients will be free from any systemic diseases as evidenced by Burkett's oral medicine health history questionnaire.

5-Remaining alveolar bone ≥ 8mm vertically and ≤ 4 mm horizontally. 6-Gingival biotype 1-2mm thickness.

Exclusion Criteria:

1. Smokers.
2. Pregnant and breast feeding females.
3. Mentally retarded Patients.
4. Presence of hematologic disease.
5. Previous radiation, chemotherapy, or immunosuppressive treatments.
6. Diabetes mellitus, metabolic bone disease, ongoing treatment with bisphosphonates drugs, or pregnancy.
7. Anticoagulant drugs, Endocarditis risk factors, renal and hepatic failure