Cardoso P E, Placido E, Francci C E, Perdigão J
University of São Paulo, School of Dentistry, Department of Dental Materials, Brazil.
Am J Dent. 1999 Dec;12(6):291-4.
To evaluate microleakage at enamel and dentin margins of Class V resin-based composite (RBC) restorations using five simplified adhesive systems, one self-etching adhesive, three commercial one-bottle adhesives and one experimental one-bottle adhesive.
Class V cavities (3 mm x 2 mm x 2 mm) were prepared in sound human molars with occlusal margins in enamel and gingival margins in dentin/cementum. Etch & Prime 3.0 (Degussa), Single Bond (3M), PQ1 (Ultradent), Prime & Bond NT (Dentsply) and Experimental BEH (Dentsply DeTrey) were applied strictly according to manufacturers instructions. All adhesive systems were applied on etched substrates, except for the self-etching adhesive Etch & Prime 3.0. Cavities were restored with Z100 RBC. After finishing and polishing, teeth were thermo-cycled (x 700, 5-55 degrees C, 60 s dwell time). Specimens were coated with nail varnish, immersed in silver nitrate for 2 hours and sectioned longitudinally with a diamond disc. The extent of leakage was measured and ranked using a 0-4 scale.
Statistical analysis using Kruskal-Wallis test revealed significantly higher leakage scores (P < 0.001) for Etch & Prime 3.0 on enamel when compared to all other adhesive systems. Regarding dentin margins none of the systems completely eliminated microleakage. PQ1 had significantly lower scores (P < 0.05) when compared to Etch & Prime 3.0 and Single Bond. No statistically significant difference was observed for the other groups.
使用五种简化粘结系统、一种自酸蚀粘结剂、三种市售单组分粘结剂和一种实验性单组分粘结剂，评估V类树脂基复合材料（RBC）修复体在牙釉质和牙本质边缘的微渗漏情况。
在健康人磨牙上制备V类洞（3 mm×2 mm×2 mm），咬合边缘位于牙釉质，牙龈边缘位于牙本质/牙骨质。严格按照制造商说明使用蚀刻与底涂剂3.0（德固赛）、单组分粘结剂（3M）、PQ1（登士柏）、底涂与粘结NT（登士柏）和实验性BEH（登士柏德瑞）。除自酸蚀粘结剂蚀刻与底涂剂3.0外，所有粘结系统均应用于蚀刻后的基底上。用Z100 RBC修复窝洞。完成修复和抛光后，对牙齿进行热循环处理（700次，5 - 55摄氏度，停留时间60秒）。将标本涂上指甲油，浸入硝酸银中2小时，然后用金刚石切割片纵向切片。使用0 - 4级量表测量并排列渗漏程度。
使用Kruskal - Wallis检验进行的统计分析显示，与所有其他粘结系统相比，蚀刻与底涂剂3.0在牙釉质上的渗漏评分显著更高（P < 0.001）。关于牙本质边缘，没有一个系统能完全消除微渗漏。与蚀刻与底涂剂3.0和单组分粘结剂相比，PQ1的评分显著更低（P < 0.05）。其他组未观察到统计学上的显著差异。
