Prevalence, Location, and Size of Maxillary Sinus Septa: Computed Tomography Scan Analysis.

INTRODUCTION The present study was undertaken to evaluate the anatomy of the maxillary sinus in relation to its position and the height of its septa, using cone beam computed tomography (CBCT). MATERIALS AND METHODS In this descriptive retrospective study, 300 CBCT images of maxillary sinuses of patients with posterior maxillary edentulism were evaluated. The maxillary sinus septa were evaluated in relation to their prevalence, height, and position; t-test and Mann-Whitney tests were used for the analysis of data. RESULTS Sinus septa were detected in 44% of the subjects, with equal frequencies in the anterior, middle, and posterior positions. The mean height of the septa was 3.6 ± 1.56 mm. CONCLUSION In a population of Iranian subjects, in half of the cases, the sinus septa might be present in the anterior, middle, and posterior positions. CLINICAL SIGNIFICANCE In order to avoid intraoperative problems during sinus lift procedures, it is necessary to accurately evaluate the sinus, preferably with the use of CBCT Keywords: Cone beam computed tomography, Dental implant, Maxillary sinus septa.