Investigate Status Of Exogenous Pigmentation In Preschool Children In Beijing

To invesgat incidence of exogenous pigmentation in deciduous teeth among 5-year-old children in Beijing area, and caries rate between children with exogenous pigmentation teeth or without were also explored. Taking children around 5 years old with deciduous dentition in Beijing area as the detective population, according to the principles of stratified, cluster and random sampling, a total of 2,963 children from 48 kindergartens in 16 districts and counties of the whole city were selected. The presence of exogenous pigmentation in deciduous teeth and the status of caries were examined. The incidence of exogenous pigmentation in deciduous teeth and caries rate as well as mean number of carious teeth were calculated. The incidence of exogenous pigmentation in deciduous teeth among 5-year-old children in Beijing was 4.80%,and the caries rate was 49.60%, with a mean number of carious teeth was 2.06. While the caries rate was 62.20%, with a mean number of carious teeth was 3.3 among children without exogenous pigmentation teeth. There were significant differences in both the caries rate and mean number of carious teeth between children with exogenous pigmentation teeth or without.(P < 0.01). The incidence of exogenous pigmentation in deciduous teeth among 5 year old children in Beijing was 4.9%. Children with exogenous pigmentation teeth had a significant lower caries rate and mean number of carious teeth compared to those who without exogenous pigmentation teeth.