Chang Jeffrey Chai, Koh Sheila H, Powers John M, Duong Joseph H
Department of Prosthodontics, University of Texas-Houston Dental Branch, Houston, Texas 77030, USA.
J Prosthet Dent. 2002 Mar;87(3):271-6. doi: 10.1067/mpr.2002.121583.
Many different materials and methods have been used to fabricate or repair veneer facings with composites, but only a few of these have been studied.
This study compared the tensile bond strengths of composites to a gold-palladium alloy with the use of several surface treatment methods.
Forty alloy specimens were cast in Eclipse (52% gold and 37.5% palladium) in the form of truncated cones. These specimens were divided equally into 4 groups. In group I, the bonding surfaces of the metal cones were treated with Silicoater MD. Truncated cones of Dentacolor composite were bonded to the metal surfaces and light-polymerized. In group II, the bonding surfaces of the metal cones were air-particle abraded with 50 microm aluminum oxide and coated with C&B Metabond. Truncated cones of Epic-TMPT composite were bonded to the metal surfaces and light-polymerized. In group III, the bonding surfaces of the metal cones were air-particle abraded with CoJet-Sand. Truncated cones of Pertac-Hybrid composite were bonded to the metal surfaces and light-polymerized. In group IV, the bonding surfaces of the metal cones were air-particle abraded with CoJet-Sand. Truncated cones of Visio-Gem were bonded to the metal surfaces and light-polymerized. After 24 hours of water immersion at 37 degrees C and 1000 thermal cycles in water at 5 degrees C and 55 degrees C, tensile forces were applied to all specimens with a universal testing machine. Analysis of variance was applied to the data (P<.05), and differences among means were determined with a Tukey-Kramer interval of 5.4 MPa.
Tensile bond strengths in MPa were as follows: Dentacolor, 14 +/- 5; Epic-TMPT, 12 +/- 4; Pertac-Hybrid, 13 +/- 5; and Visio-Gem, 18 +/- 4. The tensile bond strength of Visio-Gem was significantly higher than that of Epic-TMPT, but no differences were found among Dentacolor, Pertac-Hybrid, and Epic-TMPT (P<.05).
Within the limitations of this study, all 4 bonding systems tested produced high bond strengths between composites and a gold-palladium alloy after thermal cycling.
已经使用了许多不同的材料和方法来用复合材料制造或修复贴面，但其中只有少数得到了研究。
本研究使用几种表面处理方法比较了复合材料与金钯合金之间的拉伸粘结强度。
用Eclipse（52%金和37.5%钯）铸造40个合金试样，呈截顶圆锥体形式。这些试样平均分为4组。在第I组中，金属圆锥体的粘结表面用Silicoater MD处理。将Dentacolor复合材料的截顶圆锥体粘结到金属表面并光固化。在第II组中，金属圆锥体的粘结表面用50微米的氧化铝进行空气颗粒研磨，并用C&B Metabond涂层。将Epic-TMPT复合材料的截顶圆锥体粘结到金属表面并光固化。在第III组中，金属圆锥体的粘结表面用CoJet-Sand进行空气颗粒研磨。将Pertac-Hybrid复合材料的截顶圆锥体粘结到金属表面并光固化。在第IV组中，金属圆锥体的粘结表面用CoJet-Sand进行空气颗粒研磨。将Visio-Gem的截顶圆锥体粘结到金属表面并光固化。在37℃下浸水24小时并在5℃和55℃的水中进行1000次热循环后，用万能试验机对所有试样施加拉力。对数据应用方差分析（P<0.05），并使用5.4MPa的Tukey-Kramer区间确定均值之间的差异。
以MPa为单位的拉伸粘结强度如下：Dentacolor为14±5；Epic-TMPT为12±4；Pertac-Hybrid为13±5；Visio-Gem为18±4。Visio-Gem的拉伸粘结强度显著高于Epic-TMPT，但在Dentacolor、Pertac-Hybrid和Epic-TMPT之间未发现差异（P<0.05）。
在本研究的局限性内，测试的所有4种粘结系统在热循环后在复合材料和金钯合金之间产生了高粘结强度。
