乙醇润湿对2种全酸蚀粘接剂粘接性能的影响

Effect of ethanol saturating on bonding performance of 2 total-etch adhesives

目的:探究牙本质粘接前用乙醇润湿对临床常用2种全酸蚀粘接剂粘接强度和粘接界面质量的影响。方法:24颗新鲜拔除人无龋磨牙随机分为6组,2种粘接剂Single Bond(SB)、Gluma Comfort Bond(GB),每种分成3组用不同方法粘接即:对照组(粘结剂常规应用组)、乙醇润湿1min组、乙醇润湿2min组。每组牙制作微拉伸试件,测试24h微拉伸粘接强度(MTBS),用体视显微镜观察断面类型。用扫描电镜观察粘接界面混合层和树脂突形态。结果:乙醇润湿2min的方法使以上两种粘接剂的24h瞬时微拉伸强度(MTBS)显著提高;而乙醇浸润1min的效果与对照组无统计学差异。SEM观察结果也提示乙醇润湿2min能够显著改善粘接界面混合层的质量、增加树脂突的数量以及长度;乙醇1min可以增加树脂突长度,但对数量无明显影响。结论:乙醇润湿2min对2种粘接剂的粘接性能有显著改善。

Objective： To investigate the effect of ethanol saturating on mass of bonding interface and bonding strength of two total-etch adhesives. Methods： 24 freshly extracted human molars were randomly divided into six groups, Single Bond（SB）and Gluma Comfort Bond（GB）were used,then three subgroups were divided from every adhesive： the control group,ethanol-saturated 1min, ethanol-saturated 2min.Testing the immediately microtensile bonding strength（MTBS） and observeing the breakage type of each breaked specimen use stereomicroscope.Observing the morphology of hybrid layer and resin tags with SEM. Result： The MTBS of the two species of adhesives was significantly improved by ethanol-saturated 2min（P〈0.01）. But no obvious difference acquired in ethanol-saturated 1 min groups.SEM results also prompting that ethanol 2min can remarkable improvement of hybrid layer,then the number and length of resin tags;Ethanol 1 min increased length of resin tags, but had no evident influence on number. Conclusion： Ethanol-saturated 2min can significantly improve bonding performance of the 2 kinds of adhesives.