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RISS 인기검색어
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- 저자 : 오상엽(Sang Yeop Oh) (검색결과 2 건)
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이용근,이흥수,이성재,방기숙,오상엽 원광대학교 생체재료·매식연구소 1996 원광생체재료·매식 Vol.5 No.2
Human teeth vary widely in color. Practitioner and patients are concerned with preventing and correcting discolored or dark teeth to achieve and maintain stain-free, white teeth. Tooth brushing cannot after tooth color but it can remove adherent films and stains. Esthetics of natural dentition can be improved by bleaching and this process can be applied to intrinsically and extrinsically stained teeth. The need for a brighter, more attractive smile has made rapid growth in the marker for tooth whiteners. There is no doubt these products work as whiteners, at least on mild to moderate stains, but the safety of these products are unclear. In this experiment, the effect of tooth whitener application on the color of extracted human enamel was measured. RMS, RMT and NWT were used as tooth whiteners, and tooth paste(ETQ) and hydrogen peroxide solution(HPO) were used as controls. 35 caries-free extracted human molars were embedded and polished with the exposed enamel diameter of 4 mm. The tooth whiteners and control agents were according applied to the manufacturers' instructions of clinically simulated procedures for eight weeks, and measurements were repeated every two weeks. CLELAB color difference(ΔE^*) was measured using Differential Colorimeter(Model TC-6FX, Denshoku Co., Japan). The results were are follows ; 1. After application of tooth whiteners and controls for eight weeks, the color change of all groups were not significantly different from each other (p>0.01). But after application of agents for 2 weeks and four weeks, the color difference of NWT applied group and HPO applied group were significantly higher than those of others(p<0.01). 2. The application of tooth paste and paste type tooth whitener made gradual color change, but hydrogen peroxide gel type whitener and hydrogen peroxide solution made rapid color change during initial application period.
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