Morphometric Sex Difference in the Innominate Bone using Acetabulum—Pubic Index

The pelvic or the innominate bone is the one of the most reliable sex indicator of the skeletal remains during a medicolegal investigation followed by cranium and long bones. The present study was conducted 9 pelvis articulated with known sex and 30 unknown hip bones were selected for the present study. 9 pelvis articulated with known sex was studied using manual vernier calipers to investigate the sexual dimorphism of well established acetabulum-pubis index. In an articulated male pelvis, the A-P index was derived from the measurement of the distance between the anterior rim of acetabulum and pubic symphysis (XY) and the total width of the acetabulum (YZ). In an articulated female pelvis, the A-P index was derived from the measurement of the distance between the anterior rim of acetabulum and pubic symphysis (XY) and the total width of the acetabulum (YZ). Then the same measurement was carried in the individual hip bone of unknown sex. The data collected were tabulated and evaluated as shown in table 1 and table 2. The outcome measures of 9 pelvis showed that XY=YZ in male and XY>YZ in female. Using this scale, out of 30 individuals 22 were male and 8 were female. This study concluded that acetabulum-pubic index could be used for determination of sex.