Charlton D G, Beatty M W
Armstrong Laboratory (AFMC), Clinical Sciences Division, Brooks AFB, TX 78235-5117, USA.
Oper Dent. 1994 Jul-Aug;19(4):154-8.
This in vitro study compares the mean shear bond strengths of two dentin bonding agents to dry and to moist human dentin. The occlusal surfaces of 60 extracted human molars were ground to produce flat dentin surfaces. The teeth were divided into four groups of 15 specimens each. For Scotchbond Multi-Purpose dentin bonding agent, the teeth were etched, rinsed, and then either blotted with gauze, which left the dentin moist, or dried with compressed air. The primer and adhesive were then applied, and composite cylinders were bonded to the teeth. For Optibond, the teeth were again either blotted with gauze or dried with air. The primer and dual-activated adhesive were applied, and composite cylinders were bonded to the teeth. After storage in room-temperature distilled water for 48 hours, the specimens were thermocycled. Shear bond strength testing was performed at 1 week. Analysis using two-sample t-tests found no significant difference for either product in bond strengths to moist and to dry dentin (P > 0.05). This study indicated that for some current-generation dentin bonding agents, the presence of moisture on dentin surfaces does not compromise short-term bond strength.
这项体外研究比较了两种牙本质粘结剂对干燥和湿润人牙本质的平均剪切粘结强度。将60颗拔除的人磨牙的咬合面磨平以产生平坦的牙本质表面。将牙齿分为四组，每组15个样本。对于Scotchbond多功能牙本质粘结剂，对牙齿进行酸蚀、冲洗，然后用纱布吸干，使牙本质保持湿润，或用压缩空气吹干。然后涂抹底漆和粘结剂，并将复合圆柱体粘结到牙齿上。对于Optibond，再次用纱布吸干或用空气吹干牙齿。涂抹底漆和双固化粘结剂，并将复合圆柱体粘结到牙齿上。在室温蒸馏水中储存48小时后，对样本进行热循环处理。在1周时进行剪切粘结强度测试。使用双样本t检验分析发现，两种产品对湿润和干燥牙本质的粘结强度均无显著差异（P>0.05）。这项研究表明，对于一些当代牙本质粘结剂，牙本质表面存在水分不会损害短期粘结强度。
