Comparison of Digital and Manual Determination of Maxillary Sinus Volume: A CBCT Study.

To compare digital and manual mathematical methods in determining the volume of the maxillary sinus when utilizing CBCT scans, as well as to determine any differences in maxillary sinus volume regarding gender, patient’s edentulous status and age. A retrospective CBCT study of 247 patients was conducted (336 maxillary sinuses) to measure the maxillary sinus volume (MSV) and the supero-inferior and bucco-palatal dimensions of 639 residual ridges and the inferior cortical thickness of the maxillary sinus, at the Imam Abdulrahman bin Faisal University Dental Hospital, Dammam, Saudi Arabia. The MSV was done digitally by using OsiriX MD imaging software version (10.0), and mathematically by means of the pyramid equation: (Superoinferior x Anteroposterior x Mediolateral /3). Comparative and descriptive statistical analyses were performed using SPSS statistics version 22. The association between exposure and outcome was assessed using the student’s t-test. Examiners’ reliability and reproducibility were assessed by Cronbach’s alpha, Intraclass correlation and Cohen’s kappa tests. P-value of <0.05 was considered to be statistically significant. There was a significant difference in the MSV between sinuses measured digitally (OsiriX MD software) and mathematically (13.87 cm3 and 9.51 cm3 respectively). Most sub-sinus residual ridge sites (79.6%) had a height of ≥5 mm. Digital measurements of sinus volume are significantly more reliable than mathematical measurements. There were no significant differences in MSV regarding gender, patient’s edentulous status and age. [ABSTRACT FROM AUTHOR]