Department of Operative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkey.
J Appl Oral Sci. 2011 Aug;19(4):363-9. doi: 10.1590/s1678-77572011005000011. Epub 2011 Jun 24.
The aims of this study were to evaluate the tensile bond strengths between indirect composites and dentin of 3 recently developed self-adhesive resin cements and to determine mode of failure by SEM.
Exposed dentin surfaces of 70 mandibular third molars were used. Teeth were randomly divided into 7 groups: Group 1 (control group): direct composite resin restoration (Alert) with etch-and-rinse adhesive system (Bond 1 primer/adhesive), Group 2: indirect composite restoration (Estenia) luted with a resin cement (Cement-It) combined with the same etch-and-rinse adhesive, Group 3: direct composite resin restoration with self-etch adhesive system (Nano-Bond), Group 4: indirect composite restoration luted with the resin cement combined with the same self-etch adhesive, Groups 5-7: indirect composite restoration luted with self-adhesive resin cements (RelyX Unicem, Maxcem, and Embrace WetBond, respectively) onto the non-pretreated dentin surfaces. Tensile bond strengths of groups were tested with a universal testing machine at a constant speed of 1 mm/min using a 50 kgf load cell. Results were statistically analyzed by the Student's t-test. The failure modes of all groups were also evaluated.
The indirect composite restorations luted with the self-adhesive resin cements (groups 5-7) showed better results compared to the other groups (p<0.05). Group 4 showed the weakest bond strength (p>0.05). The surfaces of all debonded specimens showed evidence of both adhesive and cohesive failure.
The new universal self-adhesive resins may be considered an alternative for luting indirect composite restorations onto non-pretreated dentin surfaces.
本研究旨在评估 3 种新型自粘接树脂水门汀与牙本质之间的拉伸粘结强度，并通过扫描电镜（SEM）确定其失效模式。
使用 70 颗下颌第三磨牙的暴露牙本质表面。牙齿随机分为 7 组：第 1 组（对照组）：采用酸蚀-冲洗粘接系统（Bond 1 底漆/粘接剂）直接复合树脂修复（Alert），第 2 组：间接复合修复（Estenia），用树脂水门汀（Cement-It）粘接，同时使用相同的酸蚀-冲洗粘接剂，第 3 组：采用自酸蚀粘接系统（Nano-Bond）直接复合树脂修复，第 4 组：间接复合修复，用树脂水门汀粘接，同时使用相同的自酸蚀粘接剂，第 5-7 组：间接复合修复，分别用自粘接树脂水门汀（RelyX Unicem、Maxcem 和 Embrace WetBond）粘接在未经预处理的牙本质表面上。用万能试验机以 1mm/min 的恒定速度和 50kgf 的负载细胞测试各组的拉伸粘结强度。采用 Student's t 检验对结果进行统计学分析。还评估了所有组的失效模式。
用自粘接树脂水门汀粘接的间接复合修复体（第 5-7 组）与其他组相比，显示出更好的结果（p<0.05）。第 4 组粘结强度最弱（p>0.05）。所有离断标本的表面均显示出粘聚性和内聚性失效的证据。
新型通用自粘接树脂水门汀可作为非预处理牙本质表面间接复合修复体的粘接替代物。
