Department of Restorative Dentistry, Três Corações Dental School, Vale do Rio Verde University, Três Corações, MG, Brazil.
Braz Oral Res. 2011 Nov-Dec;25(6):485-91. doi: 10.1590/s1806-83242011000600003.
The purpose of the present study was to assess the bond strength of composite resin repairs subjected to different surface treatments and accelerated artificial aging. 192 cylindrical samples (CSs) were prepared and divided into 24 groups (n = 8). Half of the CSs were stored in water for 24 h, and the other half were subjected to C-UV accelerated aging for non-metallic specimens. The treatments were phosphoric acid + silane + adhesive (PSA); phosphoric acid + adhesive (PA); diamond bur + phosphoric acid + silane + adhesive (DPSA); diamond bur + phosphoric acid + adhesive (DPA); air abrasion + phosphoric acid + silane + adhesive (APSA); and air abrasion + phosphoric acid + adhesive (APA). The repair was performed and the specimens were again aged as described above. A control group (n = 8) was established and did not receive any type of aging or surface treatment. The specimens were loaded to failure in shear mode with a crosshead speed of 0.5 mm/min until fracture. Data were analyzed by one-way ANOVA/Tukey's test (p < 0.05). No statistically significant differences were found among DPSA, DPA, APSA, APA, and the control group. The aged PSA and PA achieved low bonding values and were statistically different from the control group, whereas the non-aged PSA and PA presented no statistically significant difference from the control group. Repairs with the proposed surface treatments were viable on both recent and aged restorations; however, phosphoric acid + adhesive alone were effective only on recent restorations.
本研究旨在评估不同表面处理和加速人工老化对复合树脂修复体粘结强度的影响。制备了 192 个圆柱形样本（CS），并将其分为 24 组（n = 8）。一半的 CS 储存在水中 24 小时，另一半则进行 C-UV 加速老化处理，适用于非金属样本。处理方法包括磷酸酸蚀+硅烷偶联剂+粘结剂（PSA）；磷酸酸蚀+粘结剂（PA）；金刚砂车针+磷酸酸蚀+硅烷偶联剂+粘结剂（DPSA）；金刚砂车针+磷酸酸蚀+粘结剂（DPA）；喷砂+磷酸酸蚀+硅烷偶联剂+粘结剂（APSA）；以及喷砂+磷酸酸蚀+粘结剂（APA）。进行修复后，再次按照上述方法进行老化。建立了一个对照组（n = 8），不进行任何类型的老化或表面处理。以 0.5mm/min 的十字头速度进行剪切加载，直至样本断裂。采用单因素方差分析/Tukey 检验（p < 0.05）对数据进行分析。DPSA、DPA、APSA、APA 与对照组之间无统计学差异。经老化处理的 PSA 和 PA 粘结强度值较低，与对照组有统计学差异，而未经老化处理的 PSA 和 PA 与对照组无统计学差异。采用所提出的表面处理方法对近期和老化修复体进行修复是可行的；然而，单独使用磷酸酸蚀+粘结剂仅对近期修复体有效。
