Follow-up visits during the six month post-operative period of the vertical ridge augmentation surgery will be scheduled. Standard of care procedures and evaluations will be completed during follow-up visits. The surgical sites will be evaluated after the vertical ridge augmentation procedures, in order to assess the presence of postoperative complications, such as the exposure of a d-PTFE membrane or Ti-mesh, infection, swelling, paresthesia or any other complications. All will be noted in the subject's axiUm record and reviewed at the time of Visit 4.