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Background: The purpose of this study is to determine the frequency, number, location and the orientation of the septa in the maxillary sinus by computed tomography. In addition, to evaluate the relationship of sinus septa with age, gender and type of dentition, which are patient related factors. Materials and Methods: This retrospective study was done by examining the images taken from patients who applied to Harran University Faculty of Dentistry between January 2017 and January 2020. Ethics committee approval was obtained from Harran University Clinical Research Ethics Committee with the decision numbered HRU / 20.09.08. The study was carried out by evaluating the computed tomography images of 500 head and neck regions. While examining the images, the parameters of the patient's age, gender and status of the dentition (full dentition, partial dentition, or edentulous) were recorded. Septas were classified as coronal, sagittal and transversal. Results: A total of 500 computed tomography images were examined. 446 of them were included in the study because they met the inclusion criteria. Thus, a total of 892 maxillary sinuses were examined. 198 (44.4%) of the patients examined were male and 248 (55.6%) were female. The average age of the patients was 33.4 years old, the youngest was 18 and the oldest was 79 years old. 248 patients (55.6%) were full dentition, 168 (37.7%) were partial dentition and 30 (6.7%) were edentulous. At least one septum was detected in 135 (30.2%) patients. 126 (93.3%) of these patients had only one septum, while 9 (6.7%) had more than one septum. A total of 146 septums were detected in the patients. No significant relation was found between the prevalence of maxillary sinus septa and the age (p = 0.415), gender (p = 0.443) and dentition type (p = 0.078) of the patients. A significant relation was found between the orientation and positions of the maxillary sinus septa (p = 0.017). Conclusion: As a result of this study, it was observed that approximately one third of the population had a maxillary sinus septa. Planning implant surgeries with three-dimensional images reduces the possible complications. It was also seen that three-dimensional images could change the planning based on two-dimensional images. However, it was evaluated that the results of these study need to be confirmed by more comprehensive studies.

Retrospective evaluation of the maxillary sinus septa morphology and it’s incidence in the Şanlıurfa population