Effects of 45S5 bioglass on surface properties of dental enamel subjected to 35% hydrogen peroxide

作     者：Meng Deng Hai-Lin Wen Xiao-Li Dong Feng Li Xin Xu Hong Li Ji-Yao Li Xue-Dong Zhou 

作者机构：State Key Laboratory of Oral DiseasesDepartment of Endodontics and Operative DentistryWest China Hospital of StomatologySichuan University Department of Restorative DentistryHangzhou Dental HospitalCollege of StomatologyZhejiang Chinese Medical University 

出 版 物：《International Journal of Oral Science》 (国际口腔科学杂志（英文版）)

年 卷 期：2013年第5卷第2期

页      面：103-110页

核心收录：

学科分类：1003[医学-口腔医学] 100302[医学-口腔临床医学] 10[医学] 

基　　金：supported by the Research Fund from Science and Technology Department of Sichuan Province (No. 2009FZ0065) Key Project of the Science and Technology Department of Sichuan Province (No. 2011SZ0101) Doctoral Fund of Ministry of Education of China (No. 20120181120002) supported by Open Fund of State Key Laboratory of Oral Diseases, Sichuan University 

主　　题：Bioglass enamel hydrogen peroxide tooth bleaching 

摘      要：Tooth bleaching agents may weaken the tooth structure. Therefore, it is important to minimize any risks of tooth hard tissue damage caused by bleaching agents. The aim of this study was to evaluate the effects of applying 45S5 bioglass （BG） before, after, and during 35% hydrogen peroxide （HP） bleaching on whitening efficacy, physicochemical properties and microstructures of bovine enamel. Seventy-two bovine enamel blocks were prepared and randomly divided into six groups： distilled deionized water （DDW）, BG, HP, BG before HP, BG after HP and BG during HP. Colorimetric and microhardness tests were performed before and after the treatment procedure. Representative specimens from each group were selected for morphology investigation after the final tests. A significant color change was observed in group HP, BG before HP, BG after HP and BG during HP. The microhardness loss was in the following order： group HP〉 BG before HP, BG after HP〉 BG during HP〉DDW, BG. The most obvious morphological alteration of was observed on enamel surfaces in group HP, and a slight morphological alteration was also detected in group BG before HP and BG after HP. Our findings suggest that the combination use of BG and HP could not impede the tooth whitening efficacy. Using BG during HP brought better protective effect than pre/post-bleaching use of BG, as it could more effectively reduce the mineral loss as well as retain the surface integrity of enamel. BG may serve as a promising biomimetic adjunct for bleaching therapy to prevent/restore the enamel damage induced by bleaching agents.