Vol. 4, Issue 12, Part F (2018)

Abstract
Skull is the 2^nd most reliable bone after pelvis showing sexually dimorphic features, because skull has a high resistance to adverse environmental conditions over time, resulting in the greater stability of dimorphic features. In skull mastoid region also exhibiting sexual dimorphic traits. Present study is an observational study. In which total of 49 human dry skull of known sex (26 males 23 females) were included. mastoid length in Frankfurt’s plane was measured in both side of each skull and made marking on the skull. The measurements of mastoid were taken on an anatomically sound basis using a digital vernier caliper, taking into account the error if any. The mean mastoid length in male was 30.2mm with the standard deviation of 2.64. In female skulls the mean mastoid length was 26.2mm and the standard deviation obtained was 3.57. (Table.No.1). Mastoid mean length found greater in males than in females which was highly significant (p value <0.0001). Present study aims to determine the difference in mastoid morphometry between male and female skull bone and using mastoid as a tool showing sexual dimorphism.