Evaluation of Bone Regenerated With Guided Bone Regeneration (GBR) Using Polymethylmethacrylate (PMMA) Membrane

Inclusion Criteria: * Patients with edentulous area related to horizontally deficient aesthetic zone of maxilla. * Patients are physically healthy with no medical history of any systemic or local disease that would contraindicate ridge augmentation and/or implant surgery or complicate the healing process. (Severe liver or kidney disease, a history of head and neck radiotherapy, chemotherapy at the time of surgery, uncontrolled diabetes, active periodontal in the residual dentition, inflammatory or autoimmune disorders of the oral mucosa, poor oral hygiene, patient failure to cooperate, and any other disease condition contraindicating the oral surgery). * Non-smokers. * Free from temporomandibular joint disorders and abnormal oral habits such as bruxism. * The edentulous ridges were covered with optimal thickness of keratinized mucosa with no signs of inflammation, ulceration or scar tissue. * The occlusion shows sufficient inter-arch space for future prothesis. Exclusion Criteria: * General contraindications to surgery. * Patients subjected to irradiation in the head and neck area less than 1 year before fixation. * Untreated periodontitis. * Poor oral hygiene. * Uncontrolled diabetes. * Pregnant or nursing. * Substance abuse. * Psychiatric problems or unrealistic expectations. * Severe bruxism or clenching. * Immunosuppressed or immunocompromised. * Treated or under treatment with intravenous amino-bisphosphonates. * Patients participating in other studies, if the present…