Background: The purpose of this study is to analyze if there is any statistical correlation between the surgery's complexity (easy to difficult-depending on the anatomical conditions) and the patient's sex, type of edentulism, and left or right side of the maxilla.
Methods: Cone beam computed tomography records of 1192 maxillary sinuses were evaluated, measured, and statistically analyzed with respect to patient sex, type of edentulism, and left or right side, taking into consideration Wen's proposed sinus septum classification.
Results: Our research suggests that most sinus augmentation procedures in patients presenting antral septum fall into the Moderate A category (31.94%) and that there is not a correlation between the surgery's complexity (easy to difficult) and the patient's sex, type of edentulism and left or right side of the maxilla.
Conclusion: We suggest a minor modification to Wen's classification in view of the fact that our findings revealed a combination of medio-lateral and antero-posterior septa that we could not classify in one of the existing categories.
Keywords: maxillary sinus; sinus floor augmentation; sinus septa; sinus septum classification.