摘要
目的评估漂白凝胶和洁白牙贴对3种不同的玻璃离子水门汀类材料边缘微渗漏的影响。方法在45颗离体健康前磨牙的颊舌侧制备Ⅴ类洞,随机分为A、B、C组,分别使用加强型玻璃离子水门汀KetacTMMolar Easymix、复合体F2000、复合体Dyract AP充填,每个大组再分为3个亚组,第1组和第2组分别使用质量分数14%过氧化氢(HP)洁白牙贴和10%过氧化脲(CP)凝胶进行漂白,第3组为对照组。所有样本置入37℃蒸馏水中保存7 d后冷热循环500次,然后进行漂白。漂白21 d后置于碱性品红溶液中染色24 h,沿牙体长轴通过充填体中央颊舌向剖开牙齿,体视显微镜下观察并测量染料渗入窝洞壁的深度。结果2种漂白方式对充填体边缘微渗漏的影响没有明显差异(P>0.05);与对照组相比,2种漂白方式对B、C组的微渗漏均没有产生明显影响(P>0.05),但均可使A组的微渗漏增加(P<0.05)。结论10%CP凝胶和14%HP洁白牙贴对充填体边缘微渗漏的影响无明显差异;漂白不会影响复合体的微渗漏,但会增加加强型玻璃离子水门汀的微渗漏。
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（KetacTM Molar Easymix）,compomer（F2000） and compomer（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 longi-tudinally 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（P0.05）.The two bleaching agents did not significantly affect the microleakage of compomer（P0.05）,whe-reas the microleakage of glass-ionomer cement in the experimental groups was higher than that in the control group（P0.05）.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.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2012年第4期414-416,共3页
West China Journal of Stomatology
基金
湖南省科委基金资助项目(06JJ4125)
中南大学基本科研业务费重点基金资助项目(2010DXPY012)
关键词
漂白
过氧化脲
过氧化氢
微渗漏
bleaching
carbamide peroxide
hydrogen peroxide
microleakage
