assess and compare the efficacy and safety of autogenous tooth roots for lateral alveolar ridge augmentation with staged implant placement in comparison to autogenous bone block.

A total of 14 patients in need of implant therapy and lateral ridge augmentation were allocated to parallel groups receiving either 1) healthy autogenous tooth roots (e.g. retained wisdom or impacted teeth or 2) cortical autogenous bone blocks harvested from the retromolar area. After 26 weeks of submerged healing the horizontal bone gain were assessed both clinically and radiographically. A core biopsy was taken during the implant placement to assess the histology of the newly formed bone.

Inclusion Criteria:

1. Candidate for lateral ridge augmentation
2. Insufficient bone ridge width at the recipient site for implant placement
3. Sufficient bone height at the recipient site for implant placement
4. Healthy oral mucosa, at least 3 mm keratinized tissue.
5. Presence of wisdom teeth free from periapical infection.
6. Missing maxillary or mandibular tooth with moderate horizontal defect (4-8) according to cologne classification

Exclusion Criteria:

• 1) Patients are systemically free according to Modified Cornell Medical Index 2) smokers patients. 3) Pregnant or lactating women.