School of Dentistry, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil.
J Appl Oral Sci. 2013 Mar-Apr;21(2):196-202. doi: 10.1590/1678-7757201302136.
To evaluate the effect of application time on the resin-dentin bond strength (µTBS) and etching pattern of adhesive systems applied on sclerotic dentine.
A total of forty-two bovine incisors had their roots removed. The 1-step self-etch GO (SDI), the 2-step self-etch Adper SE Bond (3MESPE) and the 35% phosphoric acid (3MESPE) from the 2-step etch-and-rinse Adper Single Bond 2 (3MESPE) were applied on the bovine incisal surfaces according to the manufacturer's instructions or duplicating the recommended conditioning time. After adhesive application, thirty teeth were restored with composite resin, stored for 24 h in distilled water at 37°C, and sectioned into resin-dentin bonded sticks (0.8 mm²) and tested according to the µTBS at 0.5 mm/min. The etching pattern of the remaining twelve teeth (n=4 for each material) was examined under scanning electron microscopy. Each tooth was divided into a buccal-to-lingual direction into three thirds, and each third randomly assigned to the groups: control (no treatment), according to the manufacturers' instructions and duplicating the recommended application time. The µTBS and the relative percentage of the tubule area opening were evaluated by two-way repeated measures ANOVA and Tukey's tests (α=0.05).
The duplication of the conditioning time favored only the GO adhesive (p<0.05). Both application methods significantly increased the tubule area opening (p<0.05) compared to the controls.
The efficacy of duplicating the conditioning time was only effective for the 1-step self-etch adhesive system tested.
评估应用时间对应用于硬化牙本质的黏接系统的树脂-牙本质黏结强度（µTBS）和酸蚀形态的影响。
共 42 颗牛切牙去除根。根据制造商的说明或复制推荐的处理时间，将一步法自酸蚀黏接剂 GO（SDI）、两步法自酸蚀黏接剂 Adper SE Bond（3MESPE）和 35%磷酸（3MESPE）应用于牛切牙表面。使用两步法自酸蚀-自润 Adper Single Bond 2（3MESPE）后，30 颗牙齿用复合树脂修复，在 37°C 蒸馏水中储存 24 小时，然后切成树脂-牙本质黏结棒（0.8mm²），以 0.5mm/min 的速度进行 µTBS 测试。用扫描电子显微镜检查其余 12 颗牙齿（每种材料 n=4）的酸蚀形态。每颗牙齿从颊舌方向分为三分之一，每个三分之一随机分为三组：对照组（无处理）、根据制造商的说明和复制推荐的应用时间。通过双因素重复测量方差分析和 Tukey 检验（α=0.05）评估 µTBS 和管腔面积开口的相对百分比。
复制处理时间仅有利于 GO 黏接剂（p<0.05）。与对照组相比，两种应用方法均显著增加了管腔面积开口（p<0.05）。
复制处理时间的效果仅对测试的一步法自酸蚀黏接系统有效。
