Alveolar Ridge Augmentation Using Minimally Invasive Subperiosteal Tunneling With Xenogenic Bone Graft and PRF

Inclusion Criteria: * Adults over 18 years old seeking an implant-supported restoration with deficient horizontal posterior maxillary alveolar ridge, at area of one or two missed teeth of less than 5 mm buccolingual width. * Minimum vertical height of 8 mm. * Gingival tissue of healthy adequate keratinization, more than 2mm. Exclusion Criteria: * The presence of uncontrolled diabetes or any other systemic condition which may complicate the surgical procedure or interfere with bone healing * Radiotherapy to the head and neck region * Chemotherapy within the last 12 months * Uncontrolled periodontitis * Smoking * Bisphosphonate therapy * Pregnancy * Presence of periapical infection or lesion