Sex estimation by discriminant function analysis using anatomical location of mental foramen

Abstract

AimThe purpose of this study was to explore sexual dimorphism in the distance between mental foramen to lower border of mandible in Chinese patients attending Faculty of Dentistry, MMMC and to derive a discriminant equation for determining sex using the data obtained. Material and methodThe archived digital orthopantomograms at the institutional database were screened and 140 radiographs were selected based on inclusion and exclusion criteria for analysis of mental foramen. Measurements between the three reference points (superior and inferior border of mental foramen and lower border of mandible) were made using Romexis software (Version: 3.0.1.R) measuring and drawing tools. The data obtained were tabulated and subjected to discriminant function analysis. ResultsDistance between mental foramen to lower border of mandible (both Right and Left S-L and I-L) were significantly higher in male than female at the level of P<0.001. The discriminant score was calculated and there was statistically significant difference between the group’s centroid. The cutting score was zero, therefore, discriminant scores ≥0 was classified as male and <0 (negative scores) was classified as female. ConclusionThe distance from the mental foramen to the lower border of the mandible (SL and IL) exhibits sexual dimorphism and can be used for sex estimation.