摘要
目的:体外评价三种漂白方法对釉质钙含量及表面微结构的影响。方法:将72颗人离体前磨牙牙冠从中间分为颊舌两部分,随机取其中一部分为实验侧,另一部分空白对照,30颗用于内着色模型的研究;42颗用于漂白实验,实验侧分别给予A组15%过氧化脲(CP)、B组15%CP与30%HP联合漂白、C组30%过氧化氢(HP),采用扫描电镜,原子吸收光谱仪观察和测量标本。结果:各组漂白后釉质中钙含量明显减少(P<0.001),且A组与B、C组相比釉质脱钙最重(P<0.01),B、C无明显统计学差异。结论:联合漂白因疗程短且釉质脱钙轻,值得临床推广。
Objective： To observe the influence of 3 common vital bleaching methods on the enamel surface and the content of calcium in enamel. Methods：The coronal part of extracted premolars was cut in half mesiodistally, with either the buccal or lingual half bleached with 15% carbamide peroxide（CP; CH6N2O3）, a mixture of 15%CP and 30% hydrogen peroxide（HP; H2O2）, 30% HP, respectively. Specimens were observed and measured with Scanning Electron Microscopy（SEM）and Atomic Absorption Spectrometer（AAS）. Results： The reduction of calcium content in the enamel was significant after bleaching（P〈0.001）, and the group treated with 15% CP showed the highes calcium reduction（P〈0.01）.Conclusion： The combined bleaching method is worthy of clinical promotion, due to shorter course of treatment and minor enamel decalcification.
出处
《中华老年口腔医学杂志》
2015年第1期19-22,共4页
Chinese Journal of Geriatric Dentistry
关键词
漂白
牙釉质
扫描电镜
原子吸收光谱仪
bleaching
enamel
adhesion of bacteria
Scanning Electron Microscopy
Atomic Absorption Spectrometer
