华西口腔医学杂志2012，Vol.30Issue(4)：414-416,3.DOI:10.3969/j.issn.1000-1182.2012.04.021
漂白剂对玻璃离子水门汀类材料充填Ⅴ类洞边缘微渗漏的影响
Effects of bleaching agents on the microleakage of class Ⅴ cavities restored with glass-ionomer cements
摘要
Abstract
Objective To evaluate the effects of a bleaching gel and a whitening strip on the microleakage of three different glass-ionomer cements. Methods Forty-five freshly extracted human premolars were used and class V cavity was prepared on the buccal and lingual surfaces. The teeth were randomly assigned to A, B and C groups and restored as follows: Conventional strengthen glass-ionomer cement (Ketac?Molar Easymix), compomer CF2000) and eompomer (Dyract AP). Teeth were kept in distilled water at 37 ? for 7 days. Then the specimens were thermocycled for 500 times. Each group was randomly divided into 3 subgroups which were treated for 21 days with one of the following: Whitening strip (14% hydrogen peroxide), bleaching gel (10% carbamide peroxide), or distilled water (control). After bleaching, the teeth were placed in a solution of basic fuchsin dye for 24 hours, then the teeth were sectioned longitudinally to evaluate the dye penetration. The depth of staining along the tooth restoration interface was recorded with a stereomicroscope. Results There were no signicant differences between the two bleaching agents in microleakage of restorations (ft>0.05\ The two bleaching agents did not significantly affect the microleakage of compomer (/VO.05), whereas the microleakage of glass-ionomer cement in the experimental groups was higher than that in the control group (P<0.05). Conclusion There are no significant differences in microleakage of restorations between bleaching gel (10% carbamide peroxide) and whitening strip (14% hydrogen peroxide). The two bleaching agents do not significantly affect the microleakage of compomer but adversely affect the microleakage of strengthen glass-ionomer cement.关键词
漂白/过氧化脲/过氧化氢/微渗漏Key words
bleaching/ carbamide peroxide/ hydrogen peroxide/ microleakage分类
医药卫生引用本文复制引用
唐健霞,冯云枝..漂白剂对玻璃离子水门汀类材料充填Ⅴ类洞边缘微渗漏的影响[J].华西口腔医学杂志,2012,30(4):414-416,3.基金项目
湖南省科委基金资助项目(06JJ4125) （06JJ4125）
中南大学基本科研业务费重点基金资助项目(2010DXPY012) （2010DXPY012）
