Identity derives from the latin and is the character set that individualize a person, making it equal to itself and different from others. Thus, the tooth size is variable according to the carrier subject characteristics. Sexual dimorphism, referring to the set of morphological differences that can exist between individuals of different sexes that make a species. An analytical observational study was carried out with the aim of determining the presence of sexual dimorphism in the size of permanent teeth and the prevalence of torus palatinus in 64 paraguayan students of the Facultad de Odontología de la Universidad Nacional de Asunción in the year 2013. It was observed that the average for women for intermolar distance was 53mm and for males was 57 mm; 85, 9% of the study population had no palatal torus. A statistically significant difference was found between sex with the intermolar distance and with the mesiodistal summation from 1.1 to 1.6 and from 2.1 to 2.6 p <0.05, with values higher than normal.