不同粘接剂修复Ⅴ类洞的边缘微渗漏情况比较

Marginal microleakage of different bonding systems in restoring Class Ⅴcavities

目的:比较不同粘接剂在Ⅴ类洞修复中的边缘微渗漏情况。方法:30颗新鲜离体前磨牙随机分为3组,每组10颗。在颊、舌侧颈缘上1 mm处制备标准的Ⅴ类洞(3 mm×2 mm×2 mm)。分别选用全酸蚀粘结剂Prime&Bond NT、自酸蚀粘结剂Clearfil SE Bond或Clearfil S3 BOND和可乐丽前后牙通用光固化复合树脂A2进行修复。立体显微镜下观察修复体边缘微渗漏的情况。结果:3种粘结剂均存在微渗漏现象。3组牙合壁微渗漏情况差异无统计学意义(χ2=1.530,P=0.465),龈壁微渗漏情况相比差异有统计学意义(χ2=8.924,P=0.012),且两个自酸蚀粘接剂组的龈壁微渗漏情况均较全酸蚀组轻(P<0.05)。结论:自酸蚀粘接剂在龈壁部位封闭效果较好,适用于Ⅴ类洞的修复。

Aim：To evaluate the marginal microleakage of different bonding systems in restoring Class Ⅴ cavities. Methods：Standardized Class Ⅴcavities（3 mm ×2 mm ×2 mm） were made in 30 extracted premolars that were randomly assigned to 3 groups （ 10 for each group ） .Three adhesive systems：Prime ＆amp; Bond NT （ group A ） , Clearfil SE Bond （ group B）,and Clearfil S3 Bond（group C） and resin composite were applied following manufacture instructions .Dye penetration was observed under a stereo microscope .Results：None of the adhensive systems eliminated microleakage completely .There were no significant differences in occlusal margin microleakage among 3 groups（χ^2 =1.530,P=0.465）,while there were significant differences in gingival margin microleakage （χ^2 =8.924,P=0.012）.The gingival margin microleakage in group B and group C was milder than that in group A （P〈0.05）.Conclusion：Self-etching bonding system can provide better sealing effect in gingival margins and is suitable for Class Ⅴcavities′restoration.