Abstract
Abstract Background Sex determination is the first step in personal identification in the forensic field. Participants and Methods The study sample included 200 participants of equal number of both sexes in the age group between 20 and 30 years. They were collected from the outpatient clinics of the Faculty of Oral and Dental Medicine, Cairo University after taking their informed consent. Maxillary arch impression was taken, with an alginate impression material using a stainless steel impression tray, for subsequent palatal rugae study. Results The mean number of primary palatal rugae was more than the secondary rugae, the wavy rugae were the most predominant type followed by the straight rugae. There was a highly statistically significant difference between males and females with a higher male values regarding the total palatal rugae number, wavy rugae number and primary rugae number while, there was a highly statistically significant difference with higher female values regarding the straight rugae numbers. There was a statistically significant negative correlation between age and primary palatal rugae number. An Egyptian equation was constructed using discriminant function analysis to determine the sex of an unidentified person. Conclusion Palatal rugae pattern study is a useful science for sex determination in the forensic field.
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