不同表面处理方法对非龋性硬化牙本质黏结强度的影响  

Effect of different surface managements on micro-tensile bond strength of non-carious sclerotic dentin to resin

作　　者：王雪[1] 仇丽鸿[1] 李子木[2] 孙海燕[1] 

机构地区：[1]中国医科大学附属口腔医院牙体牙髓病科,辽宁省口腔医学研究所,辽宁沈阳110002 [2]沈阳军区总医院牙体牙髓病科,辽宁沈阳110016

出　　处：《上海口腔医学》2013年第6期662-666,共5页Shanghai Journal of Stomatology

摘　　要：目的:通过微拉伸黏结强度实验,比较3种不同方法处理硬化牙本质表面后对复合树脂黏结强度的影响。方法:选择15颗因牙周病拔除硬化牙本质视觉分级为3级以上的面磨损磨牙,将牙根包埋在自凝塑料中,低速锯垂直于磨损面,沿颊舌径将磨损牙分为面积近似相等的两部分,每部分面积不小于6 mm2。然后在确认每颗牙分割的两部分不进入同一个实验组前提下,将30个样本随机分为3个实验组,每组10个样本。抛光组直接抛光硬化牙本质表面后,联合Optibond处理,Premisa复合树脂充填;金刚砂组用EX-26金刚砂车针打磨硬化牙本质表面,联合Optibond处理,Premisa复合树脂充填;球钻组用5#球钻处理硬化牙本质表面,联合Optibond处理,Premisa复合树脂充填。将离体牙置于37℃人工唾液中24 h后,制作微拉伸试件,测试黏结强度,在体视显微镜下观察断裂模式并分类。采用SPSS17.0软件包对试件微拉伸黏结强度值进行单因素方差分析。结果:3种不同牙面处理后的微拉伸黏结强度分别为抛光处理组(10.48±1.29)MPa,金刚砂处理组(21.52±0.97)MPa,球钻处理组(16.30±1.02)MPa。金刚砂处理组的微拉伸黏结强度大于其他2组,球钻处理组黏结强度显著大于抛光组,差别具有显著性(P<0.05)。体视显微镜观察发现,断裂多发生于树脂-牙本质黏结界面。结论:金刚砂车针处理后的硬化牙本质,树脂-牙本质微拉伸黏结强度大于球钻和抛光处理后的黏结强度。PURPOSE： To evaluate the micro-tensile bond strength of 3 different surface managements to non-carious sclerotic dentin. MOTHODS： Fifteen periodontal patients＇ occlusal wearing molars which were above 3rd degree were selected. The teeth were equally cut into two pieces along the buccolingual direction, and each piece was randomly divided into 3 groups. Group 1 was processed with polishing, group 2 was processed with EX-26 diamond bur and group 3 was processed with 5# round bur. All teeth were subjected to Optibond treatment, and then filled with composite resin （Premisa） and saved in normal artificial saliva （37~C） for 24 hours. At last, fatigue test pieces were made, the micro-tensile bond strength was evaluated and every specimen was examined under stero-microscope. The micro-tensile bond strength was analyzed with one-way analysis of variance using SPSS17.0 software package. RESULTS： The micro-tensile bond strength of the 3 groups were （10.48＋1.29） MPa, （21.52＋0.97） MPa and（16.30＋l.02） MPa, respectively. The bond strength of EX-26 diamond bur group was significantly greater than that of the other 2 groups （P〈0.05）. The bond strength of 5% round bur group was significantly greater than that of polishing group （P〈0.05）. The breakage mostly happened in adhesive dentine surface. CONCLUSIONS： Non-carious sclerotic dentin which is processed with diamond bur has better micro- tensile bonding strength.

关 键 词：硬化牙本质 全酸蚀黏结 微拉伸黏结强度 

分 类 号：R781.2[医药卫生—口腔医学]