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http://dx.doi.org/10.5392/JKCA.2012.12.01.353

Effect of 15% Carbamide Peroxide Agents with and without Potassium Nitrate and Fluoride(PF) on the Tooth Color and Surface Microhardness of Human Enamel  

Woo, Hee-Sun (경운대학교 치위생학과)
Shim, Youn-Soo (청주대학교 치위생학과)
Publication Information
The Journal of the Korea Contents Association / v.12, no.1, 2012 , pp. 353-360 More about this Journal
Abstract
The purpose of this study was to evaluate tooth color and microhardness after 15% carbamide peroxide(CP) bleaching treatments with/without potassium nitrate and fluoride(PF), which were used home bleaching. Thirty tooth specimens were obtained from thirty premolar and were randomly divided into three groups: 1, untreated controls(Distilled water): 2, treatment with 15% CP bleaching agent; 3, treatment with 15% CP bleaching agent (contained 3% potassium nitrate and 0.11% fluoride). All groups were treated 6h per day for 14 days then immersed in distilled water. Changes in enamel color were evaluated on Baseline and Day 14. Microhardness were evaluated on Baseline, Days 7 and 14. All the bleached enamel specimens revealed increased whiteness without control group. Groups 2 and 3 showed significantly decreased enamel microhardness compared to control group. On Day 7, Groups 2-3 showed significantly decreased enamel microhardness compared to control group and respective baseline data. The percentage microhardness loss(PML) look at Day 7 and 14 for Group 1, respectively, there was little difference between 1.7 and 0.8. However, Group 2 was 21.9 and 3.5, Group 3 was 16.7 and 1.4 as a baseline and Day 7 were significantly different (p<0.05). The PML of group 2 was significantly highest than that of group 3 on Day 7. As a result, the data indicate that the addition of PF did not influence the whitening efficacy of the bleaching agent negatively. PF-containing bleaching agent reduce the percentage microhardness loss. PF-containing tooth bleaching your teeth with a whitening effect can be reduced by decreasing the hardness of enamel.
Keywords
Tooth Bleaching; Carbamide Peroxide; Tooth Color; Microhardness;
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Times Cited By KSCI : 2  (Citation Analysis)
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