부산대학교 도서관

This study was designed to detect early caries lesions of children aged six years old(72 months) using QLF-D and evaluate remineralization effects by applying a fluorine varnish product to the lesion area. As a result of QLF-D shooting and analysis, the dft index and dft rate were calculated by gender and age among 83 children aged 2-5 who have one or more early caries lesions in six mandibular and maxillary anterior teeth and fluorescence loss ∆F value, remineralization recovery amount and recovery rate were compared 2weeks and 4weeks later after applying 2 kinds of fluoride varnish products such as Fluor protectorⓇ(experimental groupⅠ) and FluoroDoseⓇ(experimental groupⅡ) to the 2 experimental groups using 113 teeth of 56 study subjects as a unit of analysis. In addition, the fluorescence loss ∆F value, remineralization recovery amount and recovery rate were compared by QLF score interval after 2 and 4 weeks. The following conclusions were derived from the results. 1. Both dft index and dft rate according to gender turned out to be higher in females than in males. The dft index according to age showed that the higher the age, the higher the dft index as the number of caries was 3.7 in five year olds, 2.3 in 4 year olds, 2.2 in three year olds and 2 in 2 years. The dft rate was highest in three years olds with 79.3%, followed by five years olds, 4 years olds and 2 years olds(33.3%). 2. Fluorescence loss ∆F value, remineralization recovery amount and recovery rate showed no statistically significant differences in 2 experimental groups after 2 weeks. There was no significant difference in fluorescence loss ∆F value before and 2 weeks after applying Fluor protectorⓇ, and remineralization recovery amount turned out to be 0.383, and recovery rate 1.52%. There was no significant difference in fluorescence loss ∆F value before and 2 weeks after applying FluoroDoseⓇ, and remineralization recovery amount was found to be 0.044, recovery rate –0.81%. 3. Fluorescence loss ∆F value, remineralization recovery amount and recovery rate showed no statistically significant difference in 2 experimental groups after 4 weeks. There was a significant difference in fluorescence loss ∆F value before and 4 weeks after applying Fluor protectorⓇ(p=0.001), and remineralization recovery amount turned out to be 1.067, and recovery rate 5.88%. There was a significant difference in fluorescence loss ∆F value before and 4 weeks after applying FluoroDoseⓇ(p