THỰC TRẠNG BỆNH SÂU RĂNG SỮA TRÊN TRẺ 5-6 TUỔI Ở MỘT SỐ TRƯỜNG MẦM NON TRÊN ĐỊA BÀN HÀ NỘI NĂM 2025

Abstract

Objective: Survey on the Prevalence of Primary Tooth Decay Among 5–6-Year-Old Children in Selected Kindergartens in Hanoi in 2025. Subjects and Methods: The study involved 200 children aged 5 to 6 years attending Lomonoxop Kindergarten and the Multiple Intelligences School (MIS) in Hanoi. Data were collected through clinical dental examinations and structured interviews using standardized questionnaires. Results: The prevalence of dental caries in primary teeth was high at 72,5%. Among girls, the prevalence was 80,2%, which was 1,2 times higher than that in boys (66,1%), with a statistically significant difference (p < 0,05). The caries rate was 73,1% in 5-year-old children and 70,5% in 6-year-olds. The highest prevalence of carious lesions was observed in pits, fissures, and smooth surfaces (Site 1), accounting for 55,39% of cases. This was followed by lesions involving proximal surfaces (Site 2), which constituted 41,29% of cases. Regarding lesion size, moderate lesions (Size 2) were the most prevalent, comprising 41,08% of cases. Small lesions (Size 1) accounted for 25,73%, while extensive lesions (Size 3) represented 25,32% of cases. The dmft index (decayed, missing, and filled teeth) increased with age, from 3,03 in 5-year-olds to 4,09 in 6-year-olds, representing a 1,35-fold increase. The dmft index was higher in girls (3,84) than in boys (2,78).