In order to identify regional features of the sequence of lesions of primary teeth in children, the data of the medical in- formation system of a children’s hospital using the method of “oriented trees with estimates” were used. The data of 3,405 children under the age of 6 years who contacted a dentist about diseases of deciduous teeth during 2015–2018 were analyzed. They had 17,462 appeals. It was found that in 516 children the first diseased milk tooth was 51, with an average age of 2.72 years. The second is either 61 (237 patients, with an average age of 2.91 years), or 52 (224 patients, with an average age of 2.58 years). In 113 patients, a sequence of newly diagnosed affected primary teeth 51–52–61 was observed. Only one tooth was observed in 59.9% of patients, in 13.1% of two and in 27% of three or more teeth. It is calculated that if premolar is the first diseased milk tooth, then with a probability of 0.619 the next will be the same as the premolar. Application of the method made it possible to es- tablish regional features of the sequence of lesions of primary teeth in children and to develop approaches to individual prevention.
Focus of problem