Objective To explore the effects of fluoride ion infiltration on prevention of deciduous teeth caries of preschool children. Methods Preschool children aged 3~4-year-old from 28 preschools were selected and divided into two groups by the means of stratified cluster random sampling.The children in experimental group received oral health guidance and a bi-annual fluoride ion infiltration with NF-Ⅱ type application produced by Nanjing Medical University,and the children in control group only received oral health guidance.After two years,the prevalence of dental caries,the mean number of decayed,missed and filled teeth (dmft) and new caries morbidity were calculated. Results After two years,it was found that the prevalence of dental caries in the experimental group and the control group was 67.9%,74.3%,respectively.The mean number of decayed,missed and filled teeth (dmft) was 3.5±3.9,4.9±3.7,respectively.The new caries morbidity was 17.3%,23.4%,respectively.All of this index were significant different between the two groups (P＜0.05). Conclusion A biannual professional fluoride ion infiltration is effective in reducing the caries rate in deciduous teeth.
Key words
deciduous teeth /
caries /
fluoride ion infiltration /
prevention
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