• Mohammad S Al-Zahrani, Manea M Al-Ahmari, Ahmed A Al-Zahrani, Khalid D Al-Mutairi, and Khalid H Zawawi.
• From the Department of Periodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
• Ann Saudi Med. 2020 May 1; 40 (3): 200-206.

BackgroundThere are limited data from Saudi Arabia on the prevalence and characteristics of maxillary sinus septa.ObjectiveDetermine the prevalence and morphological characteristics of septa in the maxillary sinus and their relationship to gender and age using cone beam computed tomography (CBCT).DesignCross-sectional SETTING: CBCT images acquired from the maxillofacial radiology department in a dental school.Patient And MethodsCBCT scans of 1010 maxillary sinuses from 505 patients were analyzed to determine the prevalence, location, type, and orientation of maxillary sinus septa. Descriptive statistics, chi-square tests and t tests were used to analyze the data.Main Outcome MeasuresThe prevalence, location, type, and orientation of maxillary sinus septa.Sample Size1010 sinuses from 505 patients.ResultApproximately 46% of the studied patients had maxillary septa, which were present in 370 (37%) sinuses. About 64% of the septa were present on the right side and 85.7% of all septa were mediolater-ally oriented. The mean height of the septa was 6.06 mm (0.84) in the right sinuses and 5.70 mm (0.93) in the left sinuses. Multiple septa were found in 101 patients (20%). Among males, 58.5% had septa compared to 34% of females (P<.001.) A significant positive association was found between age and the presence and number of septa, P<.001.ConclusionsMaxillary sinus septa were highly prevalent with various heights and directions among the studied sample. Careful assessment of different anatomic variation must be conducted prior to any maxillary sinus augmentation, particularly in older patients.LimitationsCross-sectional evaluation of CBCT images from one dental school patient population; thus, the findings cannot be generalized to other populations.Conflict Of InterestNone.

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