“…She reports DMF(T+t) index 4,17, as for the city regions it is 3,25 and for the village regions -5,08. The data received from the current research is close to those presented by the National Epidemiological research in Bulgaria in 2010, as well as other local and foreign surveys [2,4,10,12,13,14]. From the examined 100 children at 5-7 years, in the current epidemiological survey is reported, that the relative share of the approximal lesions on primary molars for maxilla and mandible is 81,5% for both.…”