温度循环老化对复合树脂间粘接强度的影响  

Effect of thermal cycling on the composite-composite repair bond strength

作　　者：刘畅[1] 林斐[1] 岳林[1] 

机构地区：[1]北京大学口腔医学院·口腔医院牙体牙髓科,100081

出　　处：《中华口腔医学杂志》2015年第8期483-487,共5页Chinese Journal of Stomatology

摘　　要：目的 探讨复合树脂和粘接界面老化后树脂间粘接强度的变化,以期为临床工作提供实验依据.方法 纳入甲基丙烯酸酯类复合树脂（Clearfil AP-X,树脂A）及其配套粘接剂（Clearfil SEBond,粘接剂a）和环氧树脂（Filtek P90,树脂B）及其配套粘接剂（Filtek P90 System Adhesive,粘接剂b）.将树脂A、B分别制作基底树脂块各24块,各分为3组,每组8块：①对照组,基底树脂块表面涂布粘接剂,充填固化新树脂后切成条状试样;②粘接界面老化组,基底树脂块粘接新树脂后切成条状试样,行温度循环老化;③基底树脂老化组,将基底树脂块行温度循环老化后打磨表面,再粘接新树脂,最后切成条状试样.每组中由基底树脂（A、B）-粘接剂（a、b）-新树脂（A、B）构成8种粘接组合,每一组合设2个平行样.体视显微镜下筛选条状试样,每个粘接组合获得15条微拉伸试样,用微拉伸测试仪检测微拉伸强度,对不同粘接组合中粘接界面老化组与对照组、基底树脂老化组与对照组的微拉伸强度行独立样本t检验.结果 粘接界面老化组中,由粘接剂a粘接新树脂A或B的粘接组合[A-a-A：（45.0±3.2）MPa,B-a-A：（41.7±3.3） MPa,A-a-B：（28.6±3.9） MPa,B-a-B：（47.7±6.6） MPa],及由粘接剂b粘接新树脂A的粘接组合[A-b-A：（44.2±4.7） MPa,B-b-A：（38.0±3.2） MPa],微拉伸强度均显著低于各自对照组[A-a-A：（70.7±5.5） MPa,B-a-A：（60.3±5.1） MPa,A-a-B：（44.2±1.6） MPa,B-a-B：（54.1±3.2） MPa,A-b-A：（65.6±7.2） MPa,B-b-A：（59.1±4.1） MPa]（P＜0.05）;而由粘接剂b粘接新树脂B的粘接组合A-b-B及B-b-B的微拉伸强度与各自对照组相比差异均无统计学意义（P＞0.05）.基底树脂老化组中,各粘接组合的微拉伸强度均显著低于各自对照组（P＜0.05）.结论 复合树脂和粘接界面的老化均可对复合树脂间的粘接强度产生影响.Objective To evaluate the effect of aging of the composite and the adhesive interface on composite-composite repair bond strength.Methods Methacrylate-based composite resin（Clearfil AP-X,composite A） and silorane-based composite resin（Filtek P90,composite B） and their corresponding adhesive,Clearfil SE Bond（adhesive a） and Filtek P90 System Adhesive（adhesive b）,were selected in this study.Twenty-four substrates were prepared from composite A or B separately and divided into three groups,each group had 8 substrates：group one,new composites were adhered to the substrates with the use of adhesive a or b,followed by cutting the blocks into sticks;group two,new composites were adhered to the substrates using adhesive a or b,followed by cutting into sticks and thermal cycling;group three,substrates were thermocycled,then polished and adhered new composites using adhesive a or b,followed by cutting into sticks.Each group had 8 combinations of substrate（A,B）-adhesive（a,b）-repair composite（A,B）.Fifteen sticks without flaws in each combination of 3 groups were selected utilizing stereomicroscope.The data were analyzed by independent samples t test.Results In group two,the microtensile strength（MS） of combinations using adhesive a and composite A or B to repair[A-a-A：（45.0±3.2） MPa,B-a-A：（41.7±3.3） MPa,A-a-B：（28.6±3.9） MPa,B-a-B：（47.7±6.6） MPa],and using adhesive b and composite A to repair[A-b-A：（44.2±4.7） MPa,B-b-A：（38.0±3.2） MPa] decreased significantly compared with corresponding combinations in group 1[A-a-A：（70.7±5.5） MPa,B-a-A：（60.3±5.1） MPa,A-a-B：（44.2±1.6） MPa,B-a-B：（54.1±3.2） MPa,A-b-A：（65.6±7.2） MPa,B-b-A：（59.1±4.1） MPa] （P〈0.05）.However,there was no significant difference between the MS of combinations using adhesive b and composite B to repair in group one and the MS of combinations in group two（P〉0.05）.The MS of all combinations in group three decreased significantly（P〈0.05）.C

关 键 词：复合树脂类 树脂粘固剂 拉伸强度 粘接 温度循环 

分 类 号：R783.1[医药卫生—口腔医学]