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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effects of soldering and laser welding on bond strength of ceramic to metal.
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Effects of soldering and laser welding on bond strength of ceramic to metal.

机译：焊接和激光焊接对陶瓷与金属结合强度的影响。

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STATEMENT OF PROBLEM: Welding or soldering of metal frameworks negatively affects the overall bond strength between the veneering ceramic and metal. PURPOSE: The purpose of this study was to evaluate the effect of soldering and laser-welding procedures on the bond strength between ceramic and metal. MATERIAL AND METHODS: Thirty Ni-based metal specimens (Wiron 99) (8 x 4 x 4 mm) were fabricated and divided into 3 groups; soldered (S), laser welded (L), and control (untreated cast alloy) (n=10). In S and L specimens, a notch (1 x 1.5 mm) was prepared longitudinally on the surface of each specimen and filled with compatible alloy (Wiron soldering rods and Wiroweld NC, respectively). Vickers hardness measurements were made after polishing the surfaces with a metallographic polishing kit. A veneering ceramic (VITA VMK 95) was vibrated, condensed in a mold, and fired on the metal frameworks. The specimens were sectioned in 2 axes to obtain nontrimmed bar specimens with a bonding area of approximately 1 mm(2). Forty bars per block were obtained. Each bar was subjected to microtensile bond strength (muTBS) testing with a crosshead speed of 1 mm/min. The muTBS data (MPa) were recorded, and SEM was used for failure analysis of the tested bars. The measurements were statistically analyzed using a 1-way ANOVA and Tamhane tests (alpha=.05). RESULTS: The mean differences in muTBS of veneering ceramic to soldered (10.4 +/-2.4 MPa) and laser-welded (11.7 +/-1.3 MPa) metal surfaces were not significantly different and were significantly lower than that of the cast alloy (25.4 +/-3.6 MPa) (P<.05). The mean Vickers hardness of cast alloy was significantly higher (236 +/-17 HV) than soldered (114 +/-9 HV) and laser-welded groups (129 +/-11 HV) (P<.05). CONCLUSIONS: Soldering and laser welding significantly decreased the muTBS of a veneering ceramic to a base metal alloy.
机译：问题陈述：金属框架的焊接或锡焊会对饰面陶瓷和金属之间的整体粘结强度产生负面影响。目的：本研究的目的是评估焊接和激光焊接程序对陶瓷和金属之间的粘结强度的影响。材料与方法：制作了30个镍基金属试样（Wiron 99）（8 x 4 x 4 mm），分为3组;每组3个。焊接（S），激光焊接（L）和对照（未经处理的铸造合金）（n = 10）。在S和L标本中，在每个标本的表面上纵向制备一个缺口（1 x 1.5毫米），并用兼容的合金填充（分别为Wiron焊棒和Wiroweld NC）。用金相抛光套件抛光表面后，进行维氏硬度测量。振动饰面陶瓷（VITA VMK 95），在模具中冷凝，然后在金属框架上烧制。将试样在2个轴上切片，以获得粘结面积约为1 mm（2）的未修整的条形试样。每块获得40条。以1mm / min的十字头速度对每个条进行微拉伸粘合强度（muTBS）测试。记录muTBS数据（MPa），并将SEM用于测试钢筋的失效分析。使用1-way ANOVA和Tamhane检验（alpha = .05）对测量结果进行统计分析。结果：饰面陶瓷与焊接（10.4 +/- 2.4 MPa）和激光焊接（11.7 +/- 1.3 MPa）金属表面的muTBS的平均差异无显着差异，并且显着低于铸造合金（25.4） （+/- 3.6 MPa）（P <.05）。铸造合金的平均维氏硬度（236 +/- 17 HV）显着高于焊接（114 +/- 9 HV）和激光焊接组（129 +/- 11 HV）（P <.05）。结论：焊接和激光焊接显着降低了饰面陶瓷与贱金属合金的muTBS。

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