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IR@PKUHSC  > 北京大学口腔医学院  > 口腔颌面外科  > 期刊论文
学科主题: 口腔医学
题名:
Effects of Different pH Conditions on Enamel Erosion Repair by Nano Fluorapatite Pastes
作者: Wang, Chengjie2,3,4; Zhang, Yifei2,3,4; Wei, Jie1,4; Wei, Shicheng2,3,4
关键词: Enamel ; Erosion ; Nano Fluorapatite ; pH Value ; Self-Assembly
刊名: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
发表日期: 2012-09-01
DOI: 10.1166/jnn.2012.6508
卷: 12, 期:9, 页:7346-7353
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]: Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]: CARIES LESIONS ; HUMAN TOOTH ; HYDROXYAPATITE ; GROWTH ; PHOSPHATE ; MICROSTRUCTURE ; FLUORIDE ; SYSTEM
英文摘要:

The effects of different pH conditions on enamel erosion repair by nano fluorapatite (n-FA) pastes were evaluated in this study. Eighteen human dental enamel blocks with artificially-induced erosion were randomly divided into three groups that were coated with n-FA pastes with 3 different pH values (pH < 1, pH = 4.5 and pH = 7.5, respectively) for 15 minutes. SEM, XRD, XPS, Vickers microhardness test and mass measurement were performed for the enamels before and after treatment. A layer of enamel-like fluoride substituted hydroxyapatite was observed on the surface of all the samples. After treatment by n-FA pastes with 3 different pH values (pH < 1, pH = 4.5 and pH = 7.5), the Vickers micro-hardness value was respectively changed to 125.9 HV, 252.1 HV and 304.9 HV from 241.3 HV of the artificial enamel erosion, and mass loss was 0.75 mg/mm(2), 0.41 mg/mm(2) and 0.30 mg/mm(2), respectively. SEM analysis showed that the surface of the enamels treated by n-FA pastes with pH 7.5 and pH 4.5 was smoother than those treated by n-FA pastes with pH < 1. These results suggested that the pH value had significant effects for the repairment of enamel erosion with n-FA pastes. This study demonstrated that the n-FA paste with neutral pH value (7.5) for enamel erosion repair would not only significantly enhance the enamel surface hardness, but also avoid the enamel mass loss and increased surface roughness.

语种: 英语
所属项目编号: 2007CB936103 ; 30970720 ; 1052nm06600
项目资助者: State Key Development Program for Basic Research of China ; Fundamental Research Funds for the Central Universities ; Peking University ; National Natural Science Foundation of China ; Nano special program of Science and Technology Development of Shanghai
WOS记录号: WOS:000308856200068
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/61457
Appears in Collections:北京大学口腔医学院_口腔颌面外科_期刊论文

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作者单位: 1.E China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China
2.Peking Univ, Dept Oral & Maxillofacial Surg, Sch & Hosp Stomatol, Beijing 100081, Peoples R China
3.Peking Univ, Lab Interdisciplinary Studies, Sch & Hosp Stomatol, Beijing 100081, Peoples R China
4.Peking Univ, Acad Adv Interdisciplinary Studies, Ctr Biomed Mat & Tissue Engn, Beijing 100871, Peoples R China

Recommended Citation:
Wang, Chengjie,Zhang, Yifei,Wei, Jie,et al. Effects of Different pH Conditions on Enamel Erosion Repair by Nano Fluorapatite Pastes[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2012,12(9):7346-7353.
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