过氧化氢酶对外漂白后树脂充填体边缘微渗漏的影响  

Effect of catalase on marginal microleakage of resin restoration after external bleaching

作　　者：韩艳彦[1] 伍甜甜[1] 朱亚琴[1] HAN Yan-yan;WU Tian-tian;ZHU Ya-qin(Department of General Dentistry, Shanghai Ninth People＇s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicin;National Clinical Research Centre of Stomatolog;Shanghai Key Laboratory of Stomatology ＆ Shanghai Research Institute of Stomatology. Shanghai 200011, Chin)

机构地区：[1]上海交通大学医学院附属第九人民医院·口腔医学院口腔综合科、国家口腔疾病临床研究中心、上海市口腔医学重点实验室,上海市口腔医学研究所,上海200011

出　　处：《上海口腔医学》2018年第3期235-238,共4页Shanghai Journal of Stomatology

基　　金：国家自然科学基金(81700949)

摘　　要：目的:观察过氧化氢酶对10%过氧化脲外漂白后复合树脂充填体边缘微渗漏的影响。方法:选取牙体健康完整的人离体前磨牙40颗,随机分为4组,第1组不漂白直接进行树脂充填,第2组外漂白后立即树脂充填,第3组外漂白后将牙在人工唾液中浸泡3周再进行树脂充填,第4组外漂白后先用过氧化氢酶处理窝洞再进行树脂充填。然后将4组样本进行2000个周期的冷热循环,应用2%亚甲基蓝染色24 h,体视显微镜下观察剖面树脂充填体的微渗漏程度,采用SPSS17.0软件包对数据进行统计学分析。结果:第1组微渗漏值最低,第2组微渗漏值最高,第3组微渗漏值显著高于第1组但与第2组相比无显著差异(P>0.05);第4组微渗漏值较第2组显著下降(P<0.05)。结论:10%过氧化脲外漂白致树脂充填体边缘微渗漏明显增加,树脂充填前应用过氧化氢酶处理窝洞,可有效减少微渗漏,延迟充填不能有效改善微渗漏。PURPOSE：To investigate the effect of catalase on marginal microleakage of resin restoration after external tooth bleaching with 10% carbamide peroxide.METHODS：Forty extracted human premolars,both intact and health,were randomly divided into 4 groups：group 1,direct composite resin filling without bleaching;group 2,composite resin filling immediately after external bleaching;group 3,immersed in artificial saliva for 3 weeks after external bleaching,then filling with composite resin;group 4,cavity treated with catalase after external bleaching and then filled with composite resin.After 2000 thermal cycles,the teeth were immersed in 2% methylene blue for 24 hours,then the microleakage of interface of resin restorations was observed under stereomicroscope.The data were analysed with SPSS17.0 software package.RESULTS：Group 1 displayed the least amount of microleakage,while group 2 showed the greatest amount of microleakage,group 3 behaved similarly as group 2,having great amount of microleakage,with no significant difference（P 〉0.05）;the microleakage of group 4 decreased significantly（P〈 0.05） compared to group 2.CONCLUSIONS：The microleakage increases significantly after external bleaching with 10% carbamide peroxide,then decreases if cavities are treated with catalase,but delay filling can not improve microleakage effectively.

关 键 词：过氧化氢酶 外漂白 复合树脂 微渗漏 

分 类 号：R783[医药卫生—口腔医学]