冷光美白不同时间处理后对天然牙釉质表面粗糙度的影响  

Effect of cold-light bleaching on apparent roughness of enamel in different treatment time

作　　者：王蔚[1] 李佳佳[1] 艾红军[1] 

机构地区：[1]中国医科大学附属口腔医院修复科,辽宁沈阳110002

出　　处：《中国美容医学》2013年第9期980-983,共4页Chinese Journal of Aesthetic Medicine

基　　金：辽宁省教育厅基金资助(编号:L2011131)

摘　　要：目的:研究冷光美白不同时间处理后对天然牙釉质表面粗糙度的影响。方法:将正畸拔除的牙体完好的前磨牙去除牙根并切割成颊舌两部分,取颊侧中1/3釉质块,随机分为5组。A组为对照组置于蒸馏水中,B、C、D、E组为冷光美白组,每组每次美白时间分别为8、10、15、20min,3次为一个美白疗程。通过激光扫描共聚焦显微镜检测不同美白时间处理前后牙釉质表面粗糙度的变化。结果:结果显示经不同美白时间处理后,牙釉质表面粗糙度均有增加,且随美白时间延长增加明显。结论:冷光美白可能增加牙釉质表面粗糙度,时间越长粗糙度的增加越明显。Objective To investigate the effect of the cold-light bleaching on enamel surface roughness in different bleaching time. Methods Extracted human premolars for orthodontic reasons, were sectioned at the cement to enamel junction, and the crown portions were sectioned in half mesiodistally. Enamel slabs of were obtained from the middle third of the each tooth and randomly divided into five groups.Group A was immersed in 100ml distilled water for lh, while group B,C,D and E were treated using cold-light bleaching for 8,10,15 and 20min respectively, which were repeated 3 times.Surface roughness of enamel was measured with the profilometer before and after the bleaching procedure. Results The roughness was significantly increased in bleaching groups, and significant difference was observed between groups B,C,D and group E （P〈0.05）,while little variation was observed among the groups B, C,D（P〉0.05）. Conclusion Signi？cant roughness alterations were observed in the bleaching groups, and roughness alterations were more significant along with＇the more bleaching time.

关 键 词：冷光美白 牙釉质 表面粗糙度 

分 类 号：R783[医药卫生—口腔医学]