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  5. Promoting the efficiency of tooth bleaching by Mesoporous Catalysts
 
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Promoting the efficiency of tooth bleaching by Mesoporous Catalysts

Date Issued
2006
Date
2006
Author(s)
Chien, Yu-Shan
DOI
zh-TW
URI
http://ntur.lib.ntu.edu.tw//handle/246246/51320
Abstract
Using light sources or heat to accelerate the bleaching of 30-35% H2O2 is getting popular for in-office bleaching. However, high-concentration H2O2 has been reported to be detrimental to tooth hard tissue as well as pulp tissue, and then post-bleaching pain ensues. The aim of this study was to search for appropriate catalysts to promote the effectiveness of tooth bleaching with low concentration of H2O2. We utilized six metal ions (Fe3+, Mn2+, Zn2+, Ni 2+, Cu2+, V4+) and Sodium-Y to catalyze the reaction rate of 10mM H2O2. Spectrophotometer was used to determine the most efficient metal ions in our established tooth stain model. The determined metal ion was anchored with Histidine and subsequently incorporated into Mesorporous-MCM41 to improve bleaching ability. The results revealed that Fe3+@Sodium-Y, had the greatest bleaching ability followed by Mn2+@Sodium-Y and orthers. Histidine can improve the catalyzing ability of metal ions and exhibit no toxic effect, while mesorporous-MCM41 can increase the reaction surface area. The Fe-Histidine@Al-MCM-41 and Mn-Histidine@Al-MCM41 complex was the most useful regimen that can promote the bleaching efficiency of H2O2. Conclusion:By using Fe-Histidine@Al-MCM41 and Mn-Histidine@Al-MCM41 as the catalyst of H2O2, we may enhance the efficiency of tooth bleaching with less working-time, and thereby, decrease the potential damage of H2O2 to tooth during tooth bleaching.
Subjects
牙齒美白
過氧化氫
中孔洞分子篩
bleaching
H2O2
Mesoporous
Type
other
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ntu-95-R92450018-1.pdf

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