The efficacy of acid etching for removing contamination in layered dental restorations.
The efficacy of acid etching for removing contamination in layered dental restorations.
复制标题
酸蚀去除分层牙齿修复体中污染的功效。
作者：
A. Furuse;Rodrigo Pirolo;L. Rodrigues;Eduardo Pizzatto;E. Losso;J. Mondelli
复合树脂修复的增量层之间的污染可能在手术过程中发生。本研究试图评估两种去污处理如何影响唾液污染的复合树脂表面各层之间的剪切粘结强度。制备了40个纳米杂化复合树脂圆盘，分为4组(n=10)。除阳性对照组外，所有标本的表面均被人唾液污染。对于阴性对照样品(第2组)，不进行去污。对第3组标本进行酸蚀并涂抹粘结剂。对于第4组，在酸蚀和粘结剂应用之前，表面用钻石钻头粗糙。对试件进行剪切粘结强度测试，数据采用单因素方差分析和图基检验(α=0.0 5)。第1组、第3组和第4组样本的平均剪切粘结强度之间没有显著差异(p<；0.05)。第二组试件的剪切粘结强度显著降低(p<；0.05)。酸蚀和粘结剂的应用提高了剪切粘结强度，产生的值与阳性对照组相似。
Contamination between incremental layers of a composite resin restoration can occur during surgical procedures. The present study sought to evaluate how two decontamination treatments affected the shear bond strength between layers of a saliva-contaminated composite resin surface. Forty disks of a nanohybrid composite resin were prepared and divided into four groups (n = 10). The surfaces of all specimens (except for samples in Group 1, the positive control) were contaminated with human saliva. For the negative control samples (Group 2), no decontamination was performed. For Group 3 samples, acid etching was performed and adhesive was applied. For Group 4, surfaces were roughened with a diamond bur prior to acid etching and adhesive application. The specimens were submitted to a shear bond strength test, and the data were analyzed using one-way ANOVA and Tukey tests (α = 0.05). No significant differences were detected between the mean shear bond strengths of samples in Groups 1, 3, and 4 (p < 0.05). Shear bond strength was significantly reduced in Group 2 samples (p < 0.05). Acid etching and the application of adhesive improved shear bond strength, producing values similar to those in the positive control group.