Medina V, Shinkai K, Shirono M, Tanaka N, Katoh Y
Department of Operative Dentistry, School of Dentistry at Niigata, The Nippon Dental University, 1-8 Hamaura-cho, Niigata 951-8580, Japan.
Oper Dent. 2001 May-Jun;26(3):277-86.
This study's objectives were: 1) to determine the combination of bonding procedures (with or without acid etching, moist or dry substrate, one or two applications of primer/adhesive) that would produce the highest shear bond strength of Prime & Bond and Dyract AP and 2) to characterize the resin-dentin/enamel interface produced by these bonding procedures. Ninety-six bovine incisors were randomly assigned to eight groups for shear bond testing to enamel (n = 6) and dentin (n = 6). Prime & Bond and Dyract AP were applied and cured following manufacturers' instructions. Shear bond testing was conducted in a Universal Testing Machine. Thirty-two bovine incisors were sectioned to produce blocks with enamel and dentin, then bonded in pairs for evaluation of interfacial morphology. They were polished and argon ion-etched using a high-speed argon ion-etching machine and examined by SEM. The groups where enamel was etched, kept moist or dry and received a single application of Prime & Bond produced the highest shear bond strength. Dentin bond strengths were high in the groups where dentin was etched and kept moist. The number of Prime & Bond applications had no effect on dentin bond strength. Acid etching results in better adaptation of Prime & Bond to enamel and dentin regardless of whether moisture is present.
1）确定能使Prime & Bond和Dyract AP产生最高剪切粘结强度的粘结程序组合（有无酸蚀、湿润或干燥的基底、底漆/粘结剂的单次或两次应用）；2）表征这些粘结程序所产生的树脂-牙本质/牙釉质界面。96颗牛切牙被随机分为八组，用于对牙釉质（n = 6）和牙本质（n = 6）进行剪切粘结测试。按照制造商的说明应用并固化Prime & Bond和Dyract AP。在万能试验机上进行剪切粘结测试。将32颗牛切牙切片制成带有牙釉质和牙本质的块状，然后成对粘结以评估界面形态。它们经过抛光，使用高速氩离子蚀刻机进行氩离子蚀刻，并通过扫描电子显微镜检查。牙釉质经过蚀刻、保持湿润或干燥并单次应用Prime & Bond的组产生了最高的剪切粘结强度。在牙本质经过蚀刻并保持湿润的组中，牙本质粘结强度较高。Prime & Bond的应用次数对牙本质粘结强度没有影响。无论是否存在水分，酸蚀都会使Prime & Bond更好地适应牙釉质和牙本质。
