It is a randomized controlled trial to evaluate two surgical techniques for dental implant placement simultaneously with bone augmentation.

Implants receiving Contour Augmentations at the time of placement are randomized into two groups, submerged and non submerged. Healing is evaluated at 4 months post op compared to the day of surgery.

Inclusion Criteria:

• Age more than 21 years - ASA I or II.
• Patient's willingness to participate in this study.
• Availability for 4-month follow-up.
• Absence of active periodontal disease.
• Single tooth replacement is needed with simultaneous contour augmentation.
• Available pre-operative CBCT study.
• Extraction of tooth at least 8 weeks prior to planned implant therapy.

Exclusion Criteria:

• Pregnancy at the screening visit.
• Smoking more than 10 cig/day.
• Active infection at the site of surgery (teeth involved).
• Multiple missing teeth adjacent to each other (long span edentulous area).
• Vertical bone defect less than 2mm (intra surgical assessment)