To stabilize the craniometric data for central India population and to find out any sexual dimorphism in posterior nasal openings in the nasopharyngeal region. The present study was conducted on three hundred and twenty-two dry skulls of central India region. The dry skulls taken for study are first examined to determine the sex of the skull then various measurements of the posterior nasal opening on both side were taken. The average width of posterior nasal opening on right side among the male cases was observed 13.81(1.16) mm and for the female cases it was observed 13.46(1.32) mm (P0.05). The average width of posterior nasal opening on left side among the male cases was observed 14.02(1.08) mm and for female cases it was observed 13.57(1.13) mm (P0.001). The average width of posterior nasal opening on both side (right side & left side) of the male cases were found statistically significant higher compared with female cases. The average height of posterior nasal opening on right side among the male cases was noted at 27.41( 2.10) mm and for female it was 25.69(( 2.07) mm (P0.001). The average height of posterior nasal opening on left side among the male cases was noted at 27.58( 2.05) mm and for female it was 25.66(( 1.87) mm (P0.001). The average height of posterior nasal opening on both side (right side & left side) of male cases were statistically significant higher than female cases. In this study, there is positive correlation between the height and width of Posterior Nares and the increase in height is proportional to the increase in width. This study shows that the Posterior Nasal openings in the skulls of central Indian population is slightly larger than that mentioned in Gray’s Anatomy (39th edition) and the measurements of height and width of the posterior nasal opening on both side were found higher in male skulls than female skulls.
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