A Cohort Study Of The Influence Of Primary Dental Caries On The Permanent Dental Caries

ObjectiveThe aim of this study was to evaluate the association between caries experien ce in primary teeth and caries experience in permanent teeth in a longitudinal study through to the Shanghai Jiading district 5and 12 years old children’s de ntal caries epidemiology investigation,analysisof correlation between teeth car ies and permanent teeth caries,assessment of deciduous teeth caries of interve ntion therapy for permanent teeth caries effect.MethodsThis research adopts the cohort study design.According to the third national epidemiological sampling survey method,teeth were examined at 5 years of age and a follow-up examination was conducted 7 years later at 12 years of age in all children from Jiading District,Shanghai,China.Analyze the epidemic condition of cavities,and the correlation between primary dental caries and permanent dental caries.By intervention treatment of the primarydental caries in 5-year-old children,to study the influenceof primary dental caries of intervention therapy for permanent dental caries.This study data using Stata 13.0 software 、SPSS22.0 software for analysis.Statistical test sample rate in comparison with chi-square test,the comparison of two sample mean use independent sample t-test,teeth 5 years old,the correlation between caries and 12 teeth caries using Risk ratios analysis,statistical significance was set at P < 0.05.Results1.This study surveyed 1885 children,follow-up of 1683 children,the follow-up rate was 89.3%.The prevalence ofprimary dental caries was 67.0%,dmft 3.45 ±0.09.The prevalence of permanent dental caries of 12 years old children was 35.8%,DMFT0.75 ± 0.03.2.The group of 5-year-olds with caries had a significantly higher prevalence of caries in permanent teeth(45.5%)at 12 years of age than the group of 5-year-olds without caries(16.0%)(P < 0.001,risk ratio = 1.5).With the teeth DMFT index gradually rise,the risk of permanent dental caries gradually rise,the RR values gradually rise(P < 0.001).3.In the follow-up of the 1683 children,the number of primary dental caries was 1127,with the therapeutic intervention number 982.Under the different intervention treatment of primary dental caries,the prevalence of permanent dentalcaries in the treatment group was significantly decreased compared with control group,the difference was statistically significant(P < 0.05).Conclusion1.The prevalence of primary dental caries of 5 years old children was 67.0%in Jiading district,Shanghai,with that of permanent dental caries of 12 years old children 35.8%,higher than the national average.2.Caries in primary teeth is a major risk factor for caries in permanent teeth.The possibility of permanent dental caries increased significantlywith the greater dmft index of primary dental caries.3.Early intervention for primary dental caries treatment can obviously re duce the happening of the permanent dental caries.