Purpose: To observe the 3 years changes of deciduous teeth caries in 372 children aged 3 years old in Shanghai.
Methods: 372 samples of 3 year-old children from kindergartens in Shanghai were selected for clinical examination.The prevalence of dental caries,mean dmft score, caries severity index(CSI) and caries filling rate were calculated. The results were analyzed with SPSS13.0 software package for Chi(2) test, ANOVA and SNK.
Results: It was found that from 2005 to 2007,the prevalence of dental caries was 40.90%, 50.80% and 62.40%, respectively. The mean dmft was 2.17+/-3.38+/-2.56+/-3.61 and 3.15+/-3.87, respectively. The CSI was 6.38+/-11.16+/-7.67+/-12.04 and 8.73+/-13.03, respectively. The caries filling rate was 5.35%,13.46% and 18.15%,respectively. The prevalence of dental caries, mean dmft, CSI and caries filling rate increased gradually as the children grew up. There was significant difference among 3 years (Chi(2)=16.423,P<0.01;F=8.185,P<0.01;F=3.509,P<0.05;Chi(2)=16.423,P<0.05). SNK analysis showed that there was significant difference of dmft between 2005 and 2006 ,2005 and 2007 was found. Significant difference of CSI only between 2005 and 2007. No significant difference of incidence of caries between 2006 and 2007 was found. There was no significant difference between male and female in prevalence of dental caries,mean dmft,CSI and caries filling rate (P>0.05).
Conclusion: The trend that the status of dental caries rapidly increases as the children grow up is decreasing in Shanghai;the filling rate is still very low, early prevention and treatment for deciduous caries are needed. Supported by Shanghai Municipal Health Bureau for Development of Science and Technology (Grant No.044034).