关键词: 儿童, 学龄前；龋齿；膳食, 致龋；江西

Abstract: Background　Dental caries are common oral diseases of children，and children's eating habits make deciduous teeth easy to have caries.Understanding dietary differences and caries status of preschool children in southern and northern Jiangxi Province is of great significance for caries prevention of children in these two areas.Objective　To understand the caries status and dietary patterns of children aged 3 to 5 in the north and south of Jiangxi Province，and to explore the relationship between caries and dietary patterns，so as to provide scientific basis for caries prevention and treatment in the areas.Methods　From December 2015 to October 2016，1 152 children aged 3 to 5 in southern and northern Jiangxi Province were selected by stratified random cluster sampling method.Clinical examination of preschool children's caries，decayed teeth（dt），missing teeth（mt），filled teeth（ft） and average dental caries（dmft） was carried out by a dental specialist according to World Health Organization standards.Investigators conducted a questionnaire on children's eating patterns.The survey included the preschool children's frequency of eating sweet desserts，drinking sweet drinks and sweetened milk，and eating sweet desserts before going to bed.Results　The caries rate of children in northern Jiangxi Province was 56.3%，which was significantly higher than that of children in southern Jiangxi Province（42.0%）.The difference was statistically significant（χ2=23.354，P<0.001）.The dmft of children in northern Jiangxi Province was（2.99±3.94），which was higher than that of children in southern Jiangxi Province（1.74±2.89）.The difference was statistically significant（Z=5.841，P<0.001）.The frequency of children eating sweet desserts and drinking sweetened milk in southern and northern Jiangxi Province was statistically different（P<0.05）.Logistic regression analysis showed that caries were more likely to occur in children with elder age，high frequency of eating desserts before going to bed in the north of Jiangxi Province（P<0.05）.Spearman correlation analysis showed that the higher the frequency of eating desserts，drinking sweet drinks，and eating desserts before going to bed it was，the more dmft teeth the children had（P<0.05）.Conclusion　The caries rate and dmft of children in northern Jiangxi Province are higher than those of children in southern Jiangxi Province.The caries rate of children is correlated with the frequency of sweet food intake.The eating patterns of children in northern Jiangxi Province are generally sweet.Changing the eating patterns of preschool children in northern Jiangxi Province is of great significance for the prevention of dental caries in children.

Key words: Child, preschool；Dental caries；Diet, cariogenic；Jiangxi