To assess sexual dimorphism manifested in the process of eruption of permanent teeth (using the example of a population of children and adolescents in Udmurtia)

The purpose of the study is to identify sexual dimorphism reflected in the timing and rate of eruption of permanent teeth in children of the Udmurt Republic. Research methods: 2 160 children of the Udmurt Republic aged 5 to 14 years were examined (with an annual interval), in equal numbers of boys and girls (1080 people each), 216 children of each age for each year of the study. The eruption of permanent teeth (EPT) was determined according to WHO criteria (2001). Results. At five years of age, at the onset of EPT, the percentage of girls whose upper (UMI) and lower (LMI) medial incisors had erupted was greater than that of boys by 2.1 % and 7.7 %, respectively. At 6 years of age, the percentage differences were 2 % for UMI and 6.2 % for LMI (girls are ahead). The end of the EPT for UMI in the female population was 8 years, in the male population – at 9 years. There were 27.5 % of girls with erupted upper lateral incisors (ULI) at the age of 5, and 21.7 % of boys. The great-est differences in the percentage of male and female children who erupted their ULI were observed at ages 7 and 8 years, be-ing 12.9 % and 13.8 %, respectively. For the lower lateral incisors (LLI), a similar degree of sexual dimorphism was less typi-cal; differences between years appeared in no more than 1.8 % of cases. The end of eruption of LLI in girls was 9 years old, in boys – 10 years. Conclusion. Thus, the phenomenon of sexual dimorphism in the population of children in Udmurtia can be traced in relation to the annual intervals of eruption of the permanent medial and lateral incisors of the upper and lower jaw. The data obtained may be used in the development of population standards for teething, taking into account sex differences, in orthodontics and forensic medicine.