Autogenous Bone Block Versus Extended Platelet Rich Fibrin Block for Horizontal Augmentation of Maxillary Ridge With Simultaneous Implant Placement

Inclusion Criteria: * Maxillary narrow ridge in the esthetic anterior zone (about 4-5 mm in width). * Bone height allows the insertion of at least 8 mm of implant length without the need for vertical augmentation. * Patient aged 18-45 years old. * The presence of enough amount of keratinized gingiva as well as enough space for prosthesis rehabilitation. * Favorable occlusion without presence of parafunctional habits. * Cooperative patient with high motivation and acceptable oral hygiene. * Patients are medically free from systemic diseases or drugs that absolutely contraindicate implant surgery. * Patients able to comply with the required recall visits. Exclusion Criteria: * Local and / or systemic conditions that may affect passively the clinical procedure or results. * Heavy smokers(\>20 cigarettes/d).(1) * Alcohol or drug abuse. * Patients with parafunctional habits (bruxism and clenching). * Pregnancy. * Uncooperative patients.