Fonseca Rodrigo Borges, Martins Luis Roberto Marcondes, Quagliatto Paulo Sérgio, Soares Carlos José
School of Dentistry, Federal University of Uberlândia, Minas Gerais, Brazil.
J Adhes Dent. 2005 Autumn;7(3):225-30.
The aim of this study was to evaluate the effect of provisional cements on the adhesion of resin bonded indirect restorations and determine the best method for avoiding adverse effects.
Forty-five bovine incisors were selected, and the enamel removed with a 600-grit SiC abrasive disk to expose superficial dentin. Provisional restorations of acrylic resin were cemented with three different provisional cements: calcium hydroxide cement, Dycal (HC); cement containing zinc oxide-eugenol, Provy (ZOE); zinc oxide eugenol-free cement, TempBond NE (ZNE). The specimens were stored at 100% humidity, 37 degrees C. Then provisional restorations were removed with: (1) hand scaler for 10 s; (2) pumice-water slurry for 10 s; (3) aluminum oxide sandblasting for 10 s. The indirect restorations were subsequently cemented with Single Bond and Rely-X ARC. The teeth were sectioned, 4 slices per tooth (n = 16), and each slice trimmed with a diamond bur to obtain an adhesion area of 1 mm2. The microtensile bond strength test was performed with a universal testing machine (Instron-4411) at a crosshead speed of 0.5 mm/min. The results were analyzed with ANOVA, followed by Tukey's test (p < 0.05).
ANOVA showed significant differences in the interaction between provisional cement and dentin cleaning method; in general, aluminum oxide sandblasting provided the highest values of bond strength and calcium hydroxide the lowest.
The type of provisional cement and its method of removal can affect the adhesion of resin-bonded indirect restorations.
本研究旨在评估临时粘结剂对树脂粘结间接修复体粘结力的影响，并确定避免不良影响的最佳方法。
选取45颗牛切牙，用600目碳化硅砂轮片去除釉质以暴露表层牙本质。用三种不同的临时粘结剂粘结丙烯酸树脂临时修复体：氢氧化钙粘结剂（Dycal，HC）；含氧化锌丁香酚的粘结剂（Provy，ZOE）；不含氧化锌丁香酚的粘结剂（TempBond NE，ZNE）。将标本置于37℃、湿度100%的环境中保存。然后用以下方法去除临时修复体：（1）用手用洁治器去除10秒；（2）用浮石-水糊剂去除10秒；（3）用氧化铝喷砂10秒。随后用Single Bond和Rely-X ARC粘结间接修复体。将牙齿切片，每颗牙切4片（n = 16），每片用金刚砂车针修整以获得1平方毫米的粘结面积。用万能材料试验机（Instron - 4411）以0.5毫米/分钟的十字头速度进行微拉伸粘结强度测试。结果采用方差分析，随后进行Tukey检验（p < 0.05）。
方差分析显示临时粘结剂与牙本质清洁方法之间的相互作用存在显著差异；一般来说，氧化铝喷砂提供的粘结强度值最高，氢氧化钙粘结剂提供的最低。
临时粘结剂的类型及其去除方法会影响树脂粘结间接修复体的粘结力。
