A Study On Caries Activity Related Factors Of Children Aged 3-6 Years In Three Private Kindergartens In Nanning

Objective:To longitudinal Investigate to the complexion by caries taken and be treated, the risk factors related caries activity and streptococcus mutans among pre-school children aged 3-6 years in private kindergartens in Nanning.Methods:A one-year longitudinal study was carried out among 350 pre-school children aged 3-6 years in private kindergartens in Nanning, oral examination was recorded carefuuly to calculate prevalence of caries rate, dmft, etc.. Questionnaire was designed to investigate the caries activity related factors of society and behaviorby pre-school children. SPSS 13.0 was used for data analysis, spearman dependence analysis were used to detect the differences among prevalence of caries degree, screened out the risk factors related caries activity by establishing multiple regression model. Using the method of direct inoculate into MS, investigate the streptococcus mutans CFU and spearman dependence analysis was used to analyze the differences among different caries situations.184 pre-school children took part in both research during 1-year duration from three private kindergardens, attainded integrity longitudinal data were included to investigate incidence of newly decay missing filling surface(dmfs) which indicates the caries activities. x2-test, t-test, spearman dependence analysis and multiple regression analysis were used to analyze the risk factors by the new dmfs.Results:Among 350 children there were 263 with decays tested,the prevalence of caries rate were 75.14%, and dmfs were 4.73. Except 3 year old, the prevalence of caries by the rest ages groups were unanimous with the new city zone of Nanning 2002.The prevalence of caries aged 5 was 80.99%, dmft was 5.67. The prevalence of caries rate were unanimous with the whole nation 2005 and city of Guang Xi province, lower significantly to the country. The Single analysis by questionnaire survey indicated that factors differences significantly among zero caries,low caries and high caries included aged, habit of adding sugar to milk or drinking water, eating sweatmeat, eating candy and cake, brushing tooth by father.Multivariate analysis indicated that the caries important risk factors related of pre-school children included the Aged, sugar consumption, brushing tooth by father. The streptococcus mutans CFU in saliva median were 1.61X 105CFU/ml, differences significantly among zero caries,low caries and high canes.The prevalence of caries by 184 pre-school children were 57.1% and 76.1%, dmfs were 5.02±7.49 and 12.05±13.00, and dmfs were 5.02±7.49 and 12.05±13.00 respectivley at the baseline and end point of this study. The prevalence of caries and dmfs in pre-school children increased significantly during one-year follow-up(P<0.001).The dmfs increased,the incidence by 7.08±8.30. Multivariate analysis indicated that the risk factors related to dmfs included the baseline dmfs, food intake before bed and consumption. The salivary streptococcus mutans CFU median was 1.79X 105CFU/ml,(in which population),which shown significantly differences among different caries experiences,and streptococcus mutans CFU was the related factors for dmfs incidence (P=0.000) by spearman dependence analysis.Conclusion:The caries activity related factors of pre-school children include the severity of pre-existed caries,food intake before bed,the habit of adding sugar to milk or drinking water and the streptococcus mutans CFU.It suggested that the intervention measures should be taken for pre-school children according to this results.