Abstract:

Objective    To evaluate the sealing effect of a dentin adhesive in ClassⅤrestorations. Methods    Standardized mixed ClassⅤcavities（2 mm × 2 mm × 2 mm）were prepared in 120 extracted premolars that were randomly assigned to 4 groups（n=30 for each group）. Three adhesive systems，All Bond Universal（total-etch and self-etch），Prime & Bond NT，and G bond and resin composite，were applied to each group following manufactures′ instructions. The teeth were immersed in 50 % ammoniacal silver nitrate and depth of penetration was evaluated under a microscope，and data were statistically analyzed by SPSS 20.0 software. Results    Microleakage was observed in all groups. All Bond Universal（total-etch）scores were lower than the other two groups（P＜0.05）. There was no difference between total-etch and self-etch when All Bond Universal was used（P＞0.05）. Higher microleakage scores were observed along the gingival margin than along the occlusal margin in all groups（P＜0.05）. Conclusion    New universal adhesive （All Bond Universal） is a convenient and efficient adhesive. Total-etch and self-etch have no influence on marginal microleakage the long-term effect need further study.

Key words: new universal adhesive, microleakage, ClassⅤcavity

摘要：

目的    评价一种新型通用型牙本质粘接剂All Bond Universal对Ⅴ类洞边缘的封闭效果。方法    120颗新拔除的正常双尖牙随机分为4组（30例），分别在颊舌侧颈缘上1 mm处制备标准的Ⅴ类洞（2 mm × 2 mm × 2 mm），分别用新型通用型粘接剂All Bond Universal（全酸蚀和自酸蚀两种方法）、全酸蚀粘接剂Prime& Bond NT和自酸蚀结剂G Bond进行粘接和样本制备，经50 %氨化硝酸银染色后，体式显微镜下观察边缘微渗漏的染色情况，记录评分结果，数据用SPSS 20.0软件包进行统计学分析。结果    3种粘接剂均存在微渗漏现象，使用All Bond Universal的微渗漏评分低于同种使用方法的其他两组（P＜0.05），All Bond Universal两种使用方法的微渗漏评分差异无统计学意义（P＞0.05），龈方微渗漏评分整体高于牙合方（P＜0.05）。结论    新型通用型牙本质粘接剂All Bond Universal是一种临床应用方便、有效的牙本质粘接剂，全酸蚀和自酸蚀两种方法对边缘微渗漏的影响无差异，但其远期效果须进一步实验研究。

关键词: 新型通用型牙本质粘接剂, 微渗漏, V类洞