树脂老化时间及硅烷偶联剂对金属托槽粘结强度的影响  

Effects of composite resin aging time and silane coupling agent on bonding strength of metal brackets

作　　者：宁磊[1] 杨陆一 王守东[1] 牡琦丽 赵雪娇 闫婧 于淼 NING Lei;YANG Luyi;WANG Shoudong;MU Qili;ZHAO Xuejiao;YAN Jing;YU Miao(Department of Orthodontics,Stomatology Hospital,Jilin University,Changchun 130021,China)

机构地区：[1]吉林大学口腔医院正畸科,吉林长春130021

出　　处：《吉林大学学报（医学版）》2018年第4期764-769,共6页Journal of Jilin University：Medicine Edition

基　　金：吉林省科技厅科研基金资助课题(20150312021ZG)

摘　　要：目的:探讨临床上常用的光固化树脂固化后的不同老化时间和硅烷偶联剂对树脂与金属托槽之间粘结强度的影响,为临床上树脂的应用提供参考。方法:制作20个自凝塑料长方块,在每个长方块表面制备5个树脂表面,即100个光固化树脂测试试件;另制备5个自凝塑料长方块,每个长方块各制备1个树脂表面,即5个扫描电镜观察试件;共计105个树脂面。以松风Super snap抛光碟抛光处理后,将待测试的20个长方块随机分为5组,在人工唾液中按照老化时间的不同,以恒温水浴法(37℃)对固化后树脂试件进行老化处理,分为即刻粘结组(A组)、老化1h组(B组)、老化1d组(C组)、老化1周组(D组)和老化1个月组(E组),每个粘结组按照不同的表面处理方式分为2个表面处理组,即33%磷酸酸蚀后涂布硅烷偶联剂处理组(硅烷偶联剂处理组,A1、B1、C1、D1和E1组)和33%磷酸处理组(磷酸处理组,A2、B2、C2、D2和E2组),以3M化学固化粘结剂将树脂试件与托槽粘结,固化4min后,将试件置于装有37℃人工唾液中24h。以万能力学实验机测定各组老化树脂与金属托槽之间的抗剪切强度,记录去粘结后树脂表面的粘结剂残留指数(ARI)。5个观察试件未做表面处理,以扫描电子显微镜观察表面微观结构。结果:硅烷偶联剂处理组(A1、B1、C1、D1和E1组)间抗剪切强度比较差异有统计学意义(P<0.01);两两比较,A1组平均抗剪切强度最高,B1组和D1组分别高于C1和E1组(P<0.01),其余各组抗剪切强度比较差异均无统计学意义(P>0.05);各组抗剪切强度均高于临床正畸治疗所需粘结强度。磷酸处理组(A2、B2、C2、D2和E2组)间的抗剪切强度比较差异无统计学意义(P>0.05),仅A2组达临床正畸治疗所需抗剪切强度;两两比较,A2组平均抗剪切强度高于C2组(P<0.05),其余各组间比较差异均无统计学意义(P>0.05)。各硅烷偶联剂组的树脂抗剪切强度均大于相同老化时间磷Objective：To explore the effects of the different aging time of cured composite resin commonly used in clinic and the silane coupling agent on the bonding strength of metal brackets,and to provide reference for its clinical application.Methods：A total of 20 cuboids were made with denture resin,and 5 resin surfaces were prepared on each cuboid,then 100 specimens of resin for test were obtained.Another 5 cuboids with only one surface were prepared for observation by scanning electron microscope,and the amount of the resin surfaces was105.After the surfaces were polished with Super-snap discs,the samples were randomly divided into 5 groups;according to different aging time,all of specimens were aged by the method of constant temperature water bath（37 ℃）in the artificial saliva,and five groups included instant adhesive group（A group）,aged 1 h group（B group）,aged 1 dgroup（C group）,aged 1 week group（D group）,aged 1 month group（E group）;according to the different surface treatment methods,each bonding group was divided into two groups：coating treatment with silane coupling agent after treated by 33% phosphoric acid group（A1,B1,C1,D1 and E1 groups）and 33%phosphoric acid treatment group（A2,B2,C2,D2 and E2 groups）.The specimens were bonded with the metal brackets via 3 Mchemical cured adhesive,after 4 min solidification,the specimens were put into the artificial saliva and store for 24 hunder the temperature of 37℃.The universal mechanical testing machine was used to test the shear bond strengths between the aged composite resins and the brackets,then the adhesive remnant index（ARI）of each test composite resin surface was recorded.Five observation resin surfaces were not treated and the microstructures of different aged composite resin were observed by scanning electron microscope.Results：The shear bond strengths had significant differences between various coating silane coupling agent treatment groups（A1,B1,C1,D1 and E1 groups）（P〈0.01）;the results of comparison bet

关 键 词：树脂 老化时间 硅烷偶联剂 粘结强度 

分 类 号：R783.5[医药卫生—口腔医学]