Clinical and Histological Evaluation of Healos® for Alveolar Ridge Augmentation

Inclusion Criteria: * age 21 and older * 2-4 ADJACENT maxillary front teeth missing * require ridge augmentation and dental implant * nonsmoker for at least 6 months * willing to follow oral hygiene instruction and other study instruction * able to read, understand and sign informed consent Exclusion Criteria: * Residual upper jaw bone equal to or narrower than 3mm. * Insufficient gum tissue to obtain wound closure after surgery. * Clinically significant or unstable (as defined by the investigators) systemic diseases affecting bone or soft tissue growth; or other kidney, liver, heart, thyroid, blood, autoimmune or acute infectious diseases that makes interpretation of the data more difficult * A history of head \& neck radiation treatment due to certain medical conditions. * Taking steroids, tetracycline or tetracycline analogs, bone therapeutic levels of fluorides, bisphosphonates, medications affecting bone turnover, antibiotics for \>7 days or any investigational drug * Pregnancy or become pregnant during the length of the study * Wearing removable partial dentures that may put pressure over the area where the bone graft will be placed.