Crestal approach sinus floor elevation in atrophic posterior maxilla using only platelet rich fibrin as grafting material: A computed tomography evaluation of 2 cases

We present here the case report of two patients undergoing sinus floor elevation for atrophic maxilla by the crestal approach using only platelet-rich fibrin as a grafting material. Hydroxy apatite-coated, tapered implants were inserted simultaneously in extremely atrophic maxillae with residual bone heights of 3.7 mm (Case 1) and 1.4 mm (Case 2). Both implants achieved primary stability and were successfully loaded after 6 months of healing. Six and 12-month follow-up computed tomography scans showed the implants to have embedded into newly created bone and apical relocation of the sinus floor. Findings from both cases suggest that this procedure, using only platelet-rich fibrin as a grafting material, is suitable for use in atrophic maxillae. More patients and longer follow-up are needed to investigate the reliability of this technique.