법랑질 백색 병소 부위의 미백과 불소 처치 효과

Abstract

The objective of this study was to evaluate the effect of external bleaching and fluoride treatment on teeth with white spot lesions(WSLs) as means for improving aesthetic with minimizing tooth damage. One hundred and forty extracted teeth(the third molar), without caries, cracks, fractures, abrasions, white spot lesions, staining, and restorations in the buccal enamel surface were used as experimental specimens. The specimens were divided into a sound enamel specimen and a white spot lesion specimen and were bleached with 15% hydrogen peroxide or 35% hydrogen peroxide. The specimens with bleaching treatment were examined for color difference and demineralization after fluorine gel application. The L *, a * and b * values ​​of the CIELAB system were measured using a spectrophotometer, Vita Easyshade®V (Vita Zahnfabrik, Bad Säckingen, Germany) and the color difference(ΔE) was calculated. Before and after the fluoride treatment, specimens were taken with QLF-D Biluminator™ 2+ (QLF-D, Inspector Research System BV, Amsterdam, The Netherlands). Using QLF image analysis program (QA2 v.1.25), the relative fluorescence loss (ΔF) of lesions compared to sound enamel was analyzed. Statistical significance was tested using t-test and ANOVA using the IBM SPSS Statistics 20.0 program (IBM Corporation, Armonk, NY, USA). The difference in color value (ΔE) between the 15% H2O2 bleached enamel and 15% H2O2 bleached white spot lesion was 2.47. 15% H2O2 bleaching treatment on white lesions can improve esthetics. There was no significant relationship between tooth demineralization and bleaching(p>0.05). But applying fluorine gel at bleaching treatment has remineralization effect(p<0.05). It was concluded that fluoride application after treatment of a bleaching agent with white spot lesions is effective in improving esthetics and remineralizing teeth.