Z-Tips 1 Gingival thickness seems to represent a reliable parameter to predict sinus membrane thickness. Although every sinus mucosa should be treated delicately to avoid membrane tears, the prediction of maxillary sinus mucosal thickness may have practical implications for surgery involving the maxillary sinus. Mario Aimetti, Giampiero Massei, Matteo Morra, Enrico Cardesi, Federica Romano, INT J ORAL MAXILLOFAC IMPLANTS 2008;23:1128–1132 Š Zygoma Implant Group, Dr Vrielinck