MAXILLARY SINUS LIFT ASSOCIATED WITH FUNCTIONAL ENDOSCOPIC SINUS SURGERY (FESS): A HISTOLOGICAL STUDY

Objective: to evaluate on histological preparations the outcome of the maxillary sinus lift surgery associated with the Functional Endoscopic Sinus Surgery (FESS) in patients with a pathological maxillary sinus.
Materials and methods: 17 patients with reversible contraindications for maxillary sinus elevation were recruited. Patients had insufficient bone volume in the posterior maxillary (<5 mm). FESS and sinus lift surgery were performed in a single session. Patients have been re-evaluated 7 days, 14 days, 30 days and 3 months after surgery. After 6 months a Trephine bur with a 3 mm diameter was used to prepare the implant site and harvest the biopsy to analyse histologically.
Results and conclusions: the histological data of our samples were highly homogeneous and showed the presence of wide marrow spaces and mature bone undergoing mineralization. No signs of inflammation were found. Therefore, the previous sinus pathology did not adversely affect the outcome of maxillary sinus lift.