*2.2.2 Sinus lift*

There are different techniques for augmenting the maxillary sinus floor to create adequate bone volume. Studies have shown that the results of maxillary sinus grafting in terms of implant survival rates are best when using only biomaterial as the grafting material, with 96.0% implant survival rate at 5 years when using 100% biomaterial versus 87.8% when using autogenous bone [36].

The technique we use in the Implantology Clinic of Erasme Hospital is based on the insertion of a mixture consisting exclusively of DFDBA and platelet concentrates under the Schneiderian membrane of the maxillary sinus, after creating a bone flap using piezo surgery at the antero-external wall of the maxillary sinus. Autologous fibrin membranes are placed on the walls of the cavity, followed by a mixture of DFDBA and autologous platelet concentrates, which is obtained as described in the previous chapter. Autologous fibrin membranes are then applied outside the graft, and the mucoperiosteal flap is sutured in place (**Figure 7**).
