温度循环对自酸蚀粘接剂与牙本质粘接耐久性的影响

发布时间：2018-05-11 12:31

  本文选题：牙本质粘接剂 + 酸蚀　； 参考：《北京大学学报(医学版)》2014年02期

【摘要】：目的:用温度循环的方法评价老化对一步法和两步法自酸蚀粘接剂与牙本质粘接耐久性的影响。方法:选择人离体磨牙42颗,制备浅层牙本质平面,随机分为6组,分别使用3种自酸蚀粘接剂:两步法粘接剂Clearfil SE bond(SE),一步法粘接剂Adper Prompt(AP)和G-bond(GB),用复合树脂形成树脂冠。沿长轴纵向切割成1.0 mm×1.0 mm的条状,在粘接后24 h、温度循环(5℃~55℃)5 000次后测试微拉伸粘接强度及进行硝酸铵银渗漏实验观察界面纳米渗漏情况。粘接强度值采用单因素方差分析进行统计分析,界面渗漏情况在扫描电镜背散射模式下进行观察。结果:3种粘接剂微拉伸粘接强度分别为:SE粘接即刻(40.60±5.76)MPa,温度循环后(45.80±2.97)MPa;AP粘接即刻(19.06±1.50)MPa,温度循环后(12.62±2.10)MPa;GB粘接即刻(17.75±1.10)MPa,温度循环后(6.24±0.42)MPa。单因素方差分析显示粘接剂种类与温度循环对粘接强度均有显著影响(P0.05),二者之间存在交互作用。温度循环后,AP与GB强度显著下降(P0.05),SE略有升高。3种粘接剂相比,即刻及温度循环处理后SE粘接强度显著高于AP、GB组(P0.05)。纳米渗漏结果显示一步法自酸蚀粘接剂界面渗漏比两步法更为显著。结论:温度循环实验可导致自酸蚀粘接剂界面的变化,表现为界面形态与粘接强度的变化。一步法自酸蚀粘接剂耐久性弱于两步法自酸蚀粘接剂。
[Abstract]:Aim: to evaluate the effect of aging on the durability of self-etching adhesives and dentin adhesion by one-step and two-step method. Methods: 42 human molars were prepared and randomly divided into 6 groups. Three kinds of self-etching adhesives, Clearfil SE bonding agent, one-step bonding agent Adper prompt, and G-bond resin were used to form resin crown. Longitudinal cutting along the long axis into a 1.0 mm 脳 1.0 mm strip. After 24 hours of bonding, the microtensile bonding strength was measured after temperature cycling at 55 鈩，

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