Frequency, localization, and diameter of the accessory maxillary ostium and its relationship with sinus pathologies and nasal cavity variations: an anatomical study based on cone beam computed tomography
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Abstract
Background: The aim of the present study was to determine the presence, frequency, and characteristics of the accessory maxillary ostium (AMO) in a specific Turkish population using cone beam computed tomography (CBCT) and to evaluate the frequency of pathologies and anatomical variations in the nasal cavity and maxillary sinus and to assess their relationship with the AMO.
Materials and methods: This study retrospectively evaluated the presence of AMO in CBCT images of 543 patients, the patients’ age, gender, and dentition status, the presence of nasal cavity variations and maxillary sinus pathologies, and their relationship to the presence of AMO. Descriptive values of the data and comparative results were included.
Results: 249 males and 294 females participated in the study. The majority of right and left sinus pathologies were irregular type mucosal thickenings (right/left; 14%, 14.9%). The majority of nasal variations were concha bullosa (right/left; 37.9%, 39.2%). There were 148 (27.3%) and 138 (25.4%) AMOs on the right and left sides, respectively, with the majority in the middle position (right/left; 21.2%/17.5%). The frequency of right and left AMOs was significantly higher in men (P = 0.019 and P = 0.020, respectively). The left AMO frequency was significantly higher in patients with left-sided sinus pathology (P = 0.003). AMO diameters were larger in men (right/left P = 0.010 and P = 0.021, respectively), and left AMO diameter was significantly larger in patients with left sinus pathology (P = 0.006).
Conclusions: Before any surgical intervention in the maxillary sinus and osteomeatal region, the presence and location of the AMO, existing pathologies, and variations in the region should be carefully checked to avoid complications.
Keywords: accessory maxillary ostiumanatomical variationcone-beam computed tomographymaxillary sinussinus pathology
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