Cariology and Operative Dentistry, Department of Restorative Sciences, Gradute School, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
J Adhes Dent. 2010 Oct;12(5):393-401. doi: 10.3290/j.jad.a17713.
The aim of this study was to evaluate dentin sealing ability and microshear bond strength of two different resin cements.
Resin composite overlays (Estenia C&B) were fabricated and cemented to mid-dentin surfaces with either a self-adhesive resin cement (RelyX Unicem) or a resin cement with a self-etching primer (Panavia F2.0). After 24 h storage in water, the specimens were sectioned, placed into 50% (w/v) ammoniacal silver nitrate solution for 24 h, exposed to photodeveloping solution and observed using FE-SEM and EDS. Percentage distribution of metallic silver particles in the resin cement/dentin interface was calculated using digital image analysis software. In addition, small resin overlay cylinders were also bonded to dentin using either of the resin cements, and their bonding performance was evaluated with the microshear bond strength test. The statistical significance was defined as p ≤ 0.05.
No statistically significant difference was detected in the microshear bond strength between RelyX Unicem and Panavia F2.0 (24.9 ± 4.8 and 26.1 ± 5.3 MPa, respectively, p > 0.05). However, a significant difference was detected in silver particle penetration percentage between RelyX Unicem and Panavia F2.0 (7.4 ± 4.6 and 18.7 ± 8.7 MPa, respectively). The Kruskal-Wallis mean ranks for nanoleakage were 6.8 and 14.2, respectively (p < 0.05).
While the bond strengths of the two materials were comparable, the self-adhesive resin cement may provide better dentin sealing compared to the self-etching primer resin cement.
本研究旨在评估两种不同树脂水门汀的牙本质密封能力和微剪切粘结强度。
制作树脂复合贴面（Estenia C&B），并用自粘结树脂水门汀（RelyX Unicem）或带自酸蚀底漆的树脂水门汀（Panavia F2.0）粘结到中层牙本质表面。在水中储存 24 小时后，将试件切成薄片，放入 50%（重量/体积）氨硝酸银溶液中 24 小时，暴露于光显影溶液中，并用 FE-SEM 和 EDS 观察。使用数字图像分析软件计算树脂水门汀/牙本质界面处金属银颗粒的百分比分布。此外，还用这两种树脂水门汀将小的树脂覆盖圆柱体粘结到牙本质上，并通过微剪切粘结强度试验评估其粘结性能。统计显著性定义为 p ≤ 0.05。
RelyX Unicem 和 Panavia F2.0 的微剪切粘结强度之间没有统计学上的显著差异（分别为 24.9 ± 4.8 和 26.1 ± 5.3 MPa，p > 0.05）。然而，RelyX Unicem 和 Panavia F2.0 之间的银颗粒渗透百分比有显著差异（分别为 7.4 ± 4.6 和 18.7 ± 8.7 MPa）。纳米渗漏的 Kruskal-Wallis 平均秩分别为 6.8 和 14.2（p < 0.05）。
虽然两种材料的粘结强度相当，但自粘结树脂水门汀可能比自酸蚀底漆树脂水门汀提供更好的牙本质密封效果。
