Early Childhood Caries And Study Of Demineralization And Remineralization

Early Childhood Caries is one of the most common chronic diseases. It is associated with multiple factors such as feeding, dietary, socio-economic status, oral hygiene behavior and so on. But there is some argument among these risk factors. The aim of the Part One of the study is to investigate the prevalence and risk factors of Early Childhood Caries (ECC) and Severe-ECC (SECC) in the city of Nanjing. Dental erosion is closely associated with caries. Beverage can cause erosion and demineralization of the enamel. The Part Two of the study is to evaluate the morphological alteration and erosive effect on deciduous enamel by several kinds of beverages in Nanjing. Fluoride is used in remineralization therapy of enamel erosion and early caries. But its security is controversial. Bioglass which contain Ca2+ is now use as alternatives of fluoride. The Part Three of the study is to evaluate the effect of Oravive on remineralization and anti-demineralization with a laser fluorescence system. Part One The prevalence and risk factors of ECC and SECC among 3-5-year-olds in NanjingAbstract:【Objective】The aim of the study is to investigate the prevalence and risk factors of Early Childhood Caries (ECC) and Severe-ECC(SECC) in the city of Nanjing.【Methods】A total of 356 children were examined using a dental mirror and explorer. A parent or caregiver was asked to complete a questionnaire regarding information about their child. According to the definition of ECC and SECC, the samples were divided into group SECC and group Non-SECC or group ECC and CF. For statistical analysis, The chi-square test, Fisher's exact test and multivariable logistic regression were used.【Results】The total prevalence of ECC was 69.15% and the prevalence of SECC was 39.6%.In the Logistic regression model, the factors associated were age, children's caregiver, weaning age, feeding at night, prolonging food in the mouth and age beginning to brush teeth and exclusive feeding time. The factors associated with SECC were: age, children's caregiver, weaning age, feeding at night, prolonging food in the mouth and age beginning to brush teeth.【Conclusion】There is a high prevalence of ECC and SECC in Nanjing. It is necessary to promote early preventive measures.Part Two Dental erosion of beverages on deciduous enamelAbstract:【Objective】The aim of the study is to evaluate the morphological alteration and erosive effect on deciduous enamel by several kinds of beverages in Nanjing.【Methods】48 deciduous teeth were randomly divided into four groups, and were soaked in cola drinks, orange juice, yoghurt and deionized water respectively. A laser fluorescence system and scanning electron microscope were used to make a morphological and quantitative record.【Results】There was significant difference in laser fluorescence value in cola drinks and orange juice groups. Erosive capacity ranked from high to low was: cola drinks, orange juice and yoghurt.【Conclusion】Beverages can cause dental erosion of deciduous teeth. It is suggested that beverages consumption by children should be controlled.Part Three Effect of Oravive Remineralization and anti-demineralization Evaluated In VitroAbstract:【Objective】The aim of the study is to evaluate the effect of Oravive on remineralization and anti-demineralization with a laser fluorescence system.【Methods】60 primary teeth were randomly divided into six groups. Three groups were erosion by colar for 25 hours than treated with Oravive, fluoride dentifrice and distilled water. The other three groups were treated with Oravive, fluoride dentifrice and distilled water than erosion 25 hours. A laser fluorescence system was used to make a quantitative record.【Results】Oravive showed a statistically significant effect on remineralization and anti-demineralization. There was significant difference between Oravive and fluoride dentifrice on remineralization and anti-demineralization.【Conclusion】Oravive have remineralization and anti-demineralization effects. Oravive is superior to fluoride dentifrice on remineralization but equivalent to it on anti-demineralization.