Vergani C E, Machado A L, Giampaolo E T, Pavarina A C
São Paulo State University, Araraquara Dental School, São Paulo, Brazil.
Int J Prosthodont. 2000 Sep-Oct;13(5):383-6.
This investigation studied the effects of 3 surface treatments on the shear bond strength of a light-activated composite resin bonded to acrylic resin denture teeth.
The occlusal surfaces of 30 acrylic resin denture teeth were ground flat with up to 400-grit silicon carbide paper. Three different surface treatments were evaluated: (1) the flat ground surfaces were primed with methyl methacrylate (MMA) monomer for 180 seconds; (2) light-cured adhesive resin was applied and light polymerized according to the manufacturer's instructions; and (3) treatment 1 followed by treatment 2. The composite resin was packed on the prepared surfaces using a split mold. The interface between tooth and composite was loaded at a cross-head speed of 0.5 mm/min until failure.
Analysis of variance indicated significant differences between the surface treatments. Results of mean comparisons using Tukey's test showed that significantly higher shear bond strengths were developed by bonding composite resin to the surfaces that were previously treated with MMA and then with the bonding agent when compared to the other treatments.
Combined surface treatment of MMA monomer followed by application of light-cured adhesive resin provided the highest shear bond strength between composite resin and acrylic resin denture teeth.
本研究探讨了三种表面处理方法对光固化复合树脂与丙烯酸树脂义齿牙之间剪切粘结强度的影响。
用粒度达400目的碳化硅砂纸将30颗丙烯酸树脂义齿牙的咬合面磨平。评估了三种不同的表面处理方法:(1)将磨平的表面用甲基丙烯酸甲酯(MMA)单体处理180秒;(2)按照制造商的说明涂抹光固化粘结树脂并进行光聚合;(3)方法1后接方法2。使用分体模具将复合树脂填充到制备好的表面上。以0.5mm/min的十字头速度对牙齿与复合材料之间的界面加载直至破坏。
方差分析表明表面处理方法之间存在显著差异。使用Tukey检验进行均值比较的结果显示,与其他处理方法相比,将复合树脂粘结到先前用MMA处理然后再用粘结剂处理的表面上时,剪切粘结强度显著更高。
先用MMA单体进行表面处理,然后再涂抹光固化粘结树脂,这种联合表面处理方法在复合树脂与丙烯酸树脂义齿牙之间提供了最高的剪切粘结强度。