Crestal Bone Changes Following Equi-crestal Versus Subcrestal Implant Placement

Inclusion Criteria: * Patients older than 21 years. * Patients having augmented (by 50/50 particulate xenograft and autogenous bone) edentulous posterior site with vertical bone height of \> 10 mm in the mandible with a width of ridge ≥ 7 mm * Adequate Inter-arch space for implant placement * Favorable occlusion (no traumatic occlusion). * Good oral hygiene.•Accepts 18 months follow-up period (cooperative patient) * The patient provides informed consent. Exclusion Criteria: * Patients with inadequate bone volume and/ or quality * Patients with remaining roots or with signs of acute infection related to the area of interest. * Patients having systemic conditions that interfere with normal wound healing * Patients with habits that may jeopardize the implant longevity and affect the results of the study such as parafunctional habits . * Smoker patients. * Pregnant women.