Secondary premature loss of baby teeth in children who had seek for the orthodontic aid

Aim. To study the prevalence and structure of secondary premature loss of baby teeth in children of various ages who had seek for orthodontic aid.Methods. 998 medical charts of children aged from 3 to 10 years who were present at the department of pediatric stomatology seeking for orthodontic aid from 2003 to 2012. Groups of children were gender and age-matched. The analysis of prevalence and structure of prematurely extracted temporary teeth was performed.Results. Premature loss of temporary teeth was revealed in 312 (31.27%) out of 998 children who had seek for orthodontic aid. During the period of the temporary bite formation (3-6 years), the number of extracted deciduous incisors and molar teeth increased twice, single cases of deciduous canine teeth loss were revealed. During the mixed bite period, every 4th and/or 5th child had defects of baby tooth arches. Molars, mainly first molars, were the temporary teeth that were extracted more often. Significant increase in prevalence of a secondary premature loss of baby teeth (up to 27.91%), mainly at the lower jaw, was noticed during the period of the eruption of closely located permanent incisor teeth. Combined defects of frontal and lateral areas of temporary tooth arches were revealed in some children.Conclusion. Prevalence of a secondary premature loss of baby teeth in children of Krasnodar Krai who had seek for the orthodontic help, reached 31.27%. Upper incisors, first molar teeth, lower canines and their combination prevailed among the prematurely extracted temporary teeth. No gender differences in prevalence, structure and localization of prematurely extracted teeth according to quadrants of tooth arches were revealed.