Lima Giana da Silveira, Ogliari Fabrício Aulo, da Silva Eduardo Oliveira, Ely Caroline, Demarco Flávio Fernando, Carreño Neftali Lenin V, Petzhold Cesar Liberato, Piva Evandro
Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, RS, Brazil.
J Adhes Dent. 2008 Jun;10(3):167-72.
To investigate the influence of different water concentrations in the solvents of self-etching primers on microtensile bond strength (LTBS) of an experimental adhesive system.
Five experimental self-etching primers with 0, 5, 10, 20 and 40 (wt%) water as solvent were formulated. An experimental adhesive resin (AD-50) was also synthesized to create one experimental self-etching adhesive system. Clearfil SE Bond (CSEB) was used as the commercial reference. Sixty bovine incisors were randomly separated into 6 groups. Buccal enamel was removed to expose the superficial coronal dentin; this surface was polished wet to create a standardized smear layer. After rinsing, water was removed, leaving the surface visibly dried. The dentin surfaces were etched with primer and air dried, adhesive resin was applied and photoactivated, then the composite resin restoration was placed. After storage for 24 h, the specimens were sectioned with a cooled diamond saw at low speed. Microtensile bond strength was measured and data were analyzed with one-way ANOVA/Tukey's test (alpha = 0.05).
ANOVA showed that primer composition was a significant factor for bond strength. There was no significant difference in bond strengths between the primers with a water concentration of 40% (53.9 +/- 12.7 MPa), 20% (51.1 +/- 11.5 MPa, and 10% (47.5 +/- 11.4 MPa), and CSEB (50.7 +/- 9.8 MPa). The groups with 5% (38.6 +/- 12.9 MPa) and 0% (31.5 +/- 7.5 MPa) water presented similar bond strengths amongst themselves but were statistically significantly lower than that of the other groups.
The water concentration in the primer solvent exercises a significant influence on the bond strength of this experimental self-etching adhesive system.
研究自酸蚀底漆溶剂中不同水浓度对一种实验性粘结系统微拉伸粘结强度（LTBS）的影响。
配制了五种以0、5、10、20和40（重量%）水为溶剂的实验性自酸蚀底漆。还合成了一种实验性粘结树脂（AD - 50）以构建一个实验性自酸蚀粘结系统。使用Clearfil SE Bond（CSEB）作为商业对照。将60颗牛切牙随机分为6组。去除颊面釉质以暴露冠部表层牙本质；该表面湿磨以形成标准化的玷污层。冲洗后，去除水分，使表面明显干燥。用底漆蚀刻牙本质表面并吹干，施加粘结树脂并光固化，然后放置复合树脂修复体。储存24小时后，用冷却的金刚石锯低速切割标本。测量微拉伸粘结强度，并使用单因素方差分析/图基检验（α = 0.05）分析数据。
方差分析表明底漆组成是粘结强度的一个重要因素。水浓度为40%（53.9±12.7 MPa）、20%（51.1±11.5 MPa）和10%（47.5±11.4 MPa）的底漆与CSEB（50.7±9.8 MPa）之间的粘结强度无显著差异。水浓度为5%（38.6±12.9 MPa）和0%（31.5±7.5 MPa）的组之间粘结强度相似，但在统计学上显著低于其他组。
底漆溶剂中的水浓度对这种实验性自酸蚀粘结系统的粘结强度有显著影响。
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