Assess the Use of Platelet-rich Fibrin for Sinus Floor Elevation depending on Computed Tomography

Maxillary sinus augmentation is frequently necessary before placement of dental implants in the posterior maxilla. Besides autogenous bone graft, various bone substitutes have been used widely to augment the maxillary sinus,successful bone augmentation in the maxillary sinus without bone grafting and osseointegration of implants have been reported in several studies, recently, successful bone reformation in the sinus using autologous platelet-rich fibrin (PRF) concentrateas an alternative to bone grafting has been reported. The aim of this study: was to assess the useof PRF clots and membranes as the sole filling material during a lateral sinus lift with immediate implantation using radiologic exam (cone beam ct).