Universidade Federal do Rio Grande do Sul - UFRGS, School of Dentistry, Post-Graduate Program in Dentistry, Porto Alegre, RS, Brazil.
Universidade Federal do Rio Grande do Sul - UFRGS, School of Dentistry, Porto Alegre, RS, Brazil.
Braz Oral Res. 2024 Jul 23;38:e076. doi: 10.1590/1807-3107bor-2024.vol38.0076. eCollection 2024.
This in vitro study aimed to evaluate the repair bond strength of resin-modified glass ionomer cement using either the same material or a universal adhesive in the etch-and-rinse and self-etch modes plus resin composite. Twenty-four resin-modified glass ionomer cement blocks were stored in distilled water for 14 d and thermocycled. Sandpaper ground specimens were randomly assigned to three experimental groups according to the repair protocol: resin-modified glass ionomer cement (Riva Light Cure, SDI) and universal adhesive (Scotchbond Universal Adhesive, 3M Oral Care) in etch-and-rinse or self-etch modes and nanohybrid resin composite (Z350 XT, 3M Oral Care). After 24 h of water storage, the blocks were sectioned, and bonded sticks were subjected to the microtensile bond strength (μTBS) test. One-way ANOVA and Tukey's test were used to analyze the data. The failure mode was descriptively analyzed. The highest μTBS values were obtained when the resin-modified glass ionomer cement was repaired using the same material (p < 0.01). In addition, the mode of application of the universal adhesive system did not influence the repair bond strength of the resin-modified glass ionomer cement. Adhesive/mixed failures prevailed in all groups. Repair of resin-modified glass ionomers with the same material appears to be the preferred option to improve bond strength.
本体外研究旨在评估采用相同材料或通用粘结剂在酸蚀-冲洗和自酸蚀模式下以及复合树脂修复时对树脂改良型玻璃离子水门汀的修复粘结强度。将 24 个树脂改良型玻璃离子水门汀块在蒸馏水中储存 14 天并进行冷热循环。用砂纸打磨试件，根据修复方案将其随机分为三组实验：在酸蚀-冲洗或自酸蚀模式下使用相同材料（Riva Light Cure，SDI）和通用粘结剂（Scotchbond Universal Adhesive，3M Oral Care）或纳米复合树脂（Z350 XT，3M Oral Care）进行修复。在水储存 24 小时后，将块体切割，粘结棒进行微拉伸粘结强度（μTBS）测试。采用单因素方差分析和 Tukey 检验进行数据分析。采用描述性分析对失效模式进行分析。当使用相同材料修复树脂改良型玻璃离子水门汀时，获得了最高的 μTBS 值（p<0.01）。此外，通用粘结系统的应用方式并不影响树脂改良型玻璃离子水门汀的修复粘结强度。所有组均以粘结/混合失效为主。用相同材料修复树脂改良型玻璃离子水门汀似乎是提高粘结强度的首选方案。
