2种自制牙本质粘接剂的微拉伸粘接强度和耐久性能的实验研究  

Experimental study of the microtensile strength and durability of two different dentin adhesives

作　　者：KYOUNG PARK 朱梓园[1] 黄慧[1] 徐艺[1] 张斌[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院口腔修复科,上海市口腔医学重点实验室,上海200011

出　　处：《口腔材料器械杂志》2016年第3期144-149,共6页Chinese Journal of Dental Materials and Devices

基　　金：国家自然科学基金项目(编号:81170988)

摘　　要：目的测试自行研制的自酸蚀及全酸蚀粘接剂的微拉伸粘接强度和耐久性能,并与市售的进口同类产品进行对比。方法选用正畸拔除前磨牙60颗,随机分成4组,每组分循环前、后各2个亚组,各15个试件,分别为自制的自酸蚀粘接剂(44组)和全酸蚀粘接剂(45组),Easy one(EO组)和Single Bond2(SB组)。测试各组冷热循环前后的微拉伸粘接强度变化,并进行统计分析,体视显微镜观察断裂模式。结果冷热循环前,各组微拉伸粘接强度从大到小分别为SB组(35.05±3.01)Mpa>44组(27.76±1.44)Mpa>45组(27.65±1.67)Mpa>EO组(26.03±2.15)Mpa,45组和SB组之间及44组和EO组之间微拉伸粘接强度的差异有统计学意义(P<0.05)。冷热循环后,各组从大到小为SB组>44组>EO组>45组,45组和SB组之间及44组和EO组之间微拉伸粘接强度的差异有统计学意义(P<0.05)。同一粘接剂冷热循环前后相比,粘接强度均呈下降趋势(P<0.05);试件的断裂面类型以混合型断裂为主。结论自制牙本质粘接剂和市售的进口同类产品相比,自酸蚀粘接剂粘接强度高且耐久性能好,全酸蚀粘接剂则与之相反。冷热循环后各组粘接剂的微拉伸粘接强度均有下降。Objective To compare microtensile bond strength （pTBS） and bonding durability of self-etch and etch-and-rinse adhesives from shanghai Nano center and 3M corresponding products. Methods 60 human premolars extracted for orthodontic reasons were collected for the experiment. The specimens were divided ramdomly into 2 groups and 4 sub groups （n=15）, according to whether thermal cycling and types of resin cements rendered. Four resin cements respectively are Shanghai Nano center＇s self-etch adhesive （44, T44） and etch-andrinse adhesive （45, T45）, Easy one（EO, TEO） and Single bond2（SB, TSB）. All specimens were subjected to microtensile bond strength test （μTBS） by a microtensile tester machine. The pTBS rate was analyzed using oneway ANOVA and paired t-test （α= 0.05）, and stereoscopic microscope images of the fractured areas were used to evaluate the fracture mode. Results Before thermal cycling, μTBS rate was increased from EO（26.03± 2.15）Mpa to SB（35.05±3.01）Mpa. After thermal cycling, the result of μTBS rate, TSB was the highest, followed by T45 and TEO. Whether thermal cycling or not, the difference of μTBS test between 44 and EO was statiscally significant, the same with 45 and SB. The bonding strength of the same adhesive was declining after thermal cycles. Mixed failures were the major fracture failure patterns. Conclusions Comparing Nano center and 3m product, self-etch adhesive shows higher μTBS rate and better durability, while etch-and-rinse adhesives showed opposite result. Both μTBS rate and durability showed lower after thermal cycling in all adhesives.

关 键 词：牙本质粘接剂 微拉伸强度 冷热循环 

分 类 号：R783.1[医药卫生—口腔医学]