Aim: This study was designed to evaluate the possible variation in dimensions
of maxillary sinuses in Egyptian population using CBCT. Subjects and Methods:
120 CBCT of bilaterally maxillary sinuses of adult Egyptians of both sexes with
ages ranging from 20 to 50 years were randomly selected. Then CBCT images were
grouped according to gender, age and side. Three measurements in millimeters (width,
depth, height), were taken on the axial and coronal cross sections. Results: Right and
left height was statistically significant difference in male group than in female group < br />(P<0.005). There was not statistically significant difference in dimensions between any
age group and any another age group. It was difference between right and left sides of
maxillary sinus, but this difference was not statistically significant. Conclusion: mean
values of maxillary sinuses dimensions of males were found to be larger than these
of females and this difference was statistically significant only for height dimensions.