Comparison Between PEEK With Platelet-rich Fibrin and PEEK Alone in Maxillary Sinus Augmentation

Inclusion Criteria: * • Posterior edentulous ridges with pneumatized maxillary sinus and remaining bone height less than 4 mm. * ASA physical status I and II. * Patients willing to be a part of the study and ready to give their consent in writing for the same. * Patient not complain from maxillary sinusitis * Patient with good oral hygiene. * Both males as well as females without any active periodontal disease. * The edentulous ridges are covered with optimal thickness of mucoperiosteum with no signs of inflammation, ulceration or scar tissue. * Remaining natural teeth have good periodontal tissue support and occlusion showed sufficient inter arch space for future prosthesis. Exclusion Criteria: * • General contraindications to implant surgery. * Untreated gingivitis, periodontitis. * Subjected to irradiation in the head and neck area less than 1 year before implantation. * Untreated periodontitis. * Pregnant or nursing. * Unable to open mouth sufficiently to accommodate the surgical tooling. * Patients participating in other studies, if the present protocol could not be properly followed. * Patient who could/would not participate in the follow-up period.