Department of Oral Rehabilitation, The Maurice and Gabriella School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
J Dent. 2012 Jul;40(7):594-602. doi: 10.1016/j.jdent.2012.04.001. Epub 2012 Apr 12.
To assess the shear bond strength between amalgam and resin composite mediated by either multipurpose adhesive systems or RMGI when subjected to long term immersion in saline.
Part I: Cylindrical specimens (6 mm × 6 mm) composed of equal parts of sandblasted set amalgam (Oralloy) and composite (Z-100), with a thin layer of either Scotchbond Multipurpose, All Bond 2, Amalgam Bond Plus, High Q Bond Plus or Vitrebond in between were fabricated (n = 100 × 5). Each group was divided into 3 subgroups, immersed in saline at 37 °C for either 48 h, 3 or 6 months, followed by thermocycling (5000; 5/55 °C) and shear bond strength testing (SBS). Part II: Identical specimens were fabricated with intermediary of either Ketac Cem, Fuji Lining LC, Rely X Luting, Fuji Plus or Meron Plus (n = 100 × 5). Immersion periods, followed by thermocycling and SBS testing as in Part I. Two representative specimens from each subgroup were sectioned and inspected under SEM.
The two classes of intermediary agents yielded SBS which differed mainly in the 6 months incubation period. While multipurpose adhesives provided SBS values of ~9-10 MPa RMGI provided higher SBS of ~16 MPa. All Bond 2 and Amalgam Bond Plus exhibited deterioration of SBS during the 6 month period as well as Rely X Luting. Gap sizes between 0.5 and 3 μm exist between all intermediaries and the amalgam; on the other hand all intermediaries exhibit gap-free interfaces between the adhesives/RMGI and the composite.
Vitrebond in particular and RMGIs in general can serve as an excellent coupler of resin composite to amalgam, providing a durable bond.
评估在长期盐水中浸泡后，多功能粘结剂系统或 RMGI 介导的银汞合金与树脂复合材料之间的剪切粘结强度。
第 I 部分：由喷砂处理的银汞合金（Oralloy）和复合材料（Z-100）以 1:1 比例组成的圆柱形样本（6mm×6mm），中间夹有一层 Scotchbond Multipurpose、All Bond 2、Amalgam Bond Plus、High Q Bond Plus 或 Vitrebond（n=100×5）。每个组分为 3 个亚组，37°C 下的盐水中浸泡 48h、3 个月或 6 个月，随后进行热循环（5000 次；5/55°C）和剪切粘结强度测试（SBS）。第 II 部分：用 Ketac Cem、Fuji Lining LC、Rely X 粘固剂、Fuji Plus 或 Meron Plus 作为中间剂制作相同的样本（n=100×5）。按照第 I 部分的方法进行浸泡期、热循环和 SBS 测试。从每个亚组中选择两个代表性样本进行切割，并在 SEM 下进行检查。
两种中间剂类别的 SBS 主要在 6 个月的孵育期有所不同。虽然多功能粘结剂提供了约 9-10MPa 的 SBS 值，但 RMGI 提供了约 16MPa 的更高 SBS 值。All Bond 2 和 Amalgam Bond Plus 在 6 个月的时间内表现出 SBS 的恶化，Rely X 粘固剂也是如此。所有中间剂与银汞合金之间存在 0.5-3μm 的间隙尺寸；另一方面，所有中间剂在粘结剂/RMGI 和复合材料之间都显示出无间隙的界面。
特别是 Vitrebond 和一般的 RMGI 可以作为树脂复合材料与银汞合金的出色偶联剂，提供持久的粘结。
