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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of soldering on the metal-ceramic bond strength of an Ni-Cr base alloy.
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Effect of soldering on the metal-ceramic bond strength of an Ni-Cr base alloy.

机译：焊接对Ni-Cr基合金的金属陶瓷结合强度的影响。

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STATEMENT OF PROBLEM: Although soldering is a common laboratory procedure, the use of soldering alloys may adversely affect metal-ceramic bond strength and potentially decrease the longevity of metal-ceramic restorations. PURPOSE: The purpose of this study was to investigate the effect of soldering on metal-ceramic bond strength of a representative Ni-Cr base metal alloy. MATERIAL AND METHODS: Twenty-eight rectangular (25 x 3 x 0.5 mm) Ni-based alloy (Wiron 99) specimens were equally divided into soldering (S) and reference (R) groups. Soldering group specimens were covered with a 0.1-mm layer of the appropriate solder (Wiron-Lot) and reduced by 0.1 mm on the opposite side. Five specimens of each group were used for the measurement of surface roughness parameter (R(z)) and hardness, and 3 were used for measurement of the modulus of elasticity. Six specimens of each group were covered with porcelain (Ceramco 3) and subjected to a 3-point bending test for evaluation of the metal-ceramic bond strength according to the ISO 9693 specification. The data from surface roughness, hardness, modulus of elasticity, and metal-ceramic bond strength were analyzed statistically, using independent t tests (alpha=.05). RESULTS: Statistical analysis of the R(z) surface roughness parameter (S: 3.4 +/- 0.3 mum; R: 3.7 +/- 0.7 microm; P=.07) and bond strength (S: 46 +/- 3 MPa; R: 40 +/- 5 MPa; P=.057) failed to reveal any significant difference between the 2 groups. The specimens of the soldering group demonstrated significantly lower values both in hardness (S: 128 +/- 11 VHN; R: 217 +/- 4 VHN; P<.001) and in modulus of elasticity (S: 135 +/- 4 GPa; R: 183 +/- 6 GPa; P=.035) than the reference group. CONCLUSION: Under the conditions of the present study, the addition of solder to the base metal alloy did not affect the metal-ceramic bond strength.
机译：问题陈述：尽管钎焊是实验室中的常见程序，但是使用钎焊合金可能会对金属-陶瓷结合强度产生不利影响，并可能降低金属-陶瓷修复体的使用寿命。目的：本研究的目的是研究钎焊对代表性的镍铬基金属合金的金属陶瓷结合强度的影响。材料和方法：将28个矩形（25 x 3 x 0.5 mm）镍基合金（Wiron 99）标本平均分为焊接（S）组和参考（R）组。焊接组样品覆盖有0.1毫米的适当焊料层（Wiron-Lot），并在另一侧减小了0.1毫米。每组五个样品用于测量表面粗糙度参数（R（z））和硬度，而三个样品用于测量弹性模量。每组的六个样品用瓷器（Ceramco 3）覆盖，并进行三点弯曲测试，以根据ISO 9693规范评估金属陶瓷结合强度。使用独立的t检验（alpha = .05）对来自表面粗糙度，硬度，弹性模量和金属-陶瓷结合强度的数据进行统计分析。结果：R（z）表面粗糙度参数（S：3.4 +/- 0.3微米; R：3.7 +/- 0.7微米; P = .07）和粘结强度（S：46 +/- 3 MPa; S：46 +/- 3 MPa）的统计分析。 R：40 +/- 5 MPa; P = .057）未能显示出两组之间的任何显着差异。焊接组的样品在硬度（S：128 +/- 11 VHN; R：217 +/- 4 VHN; P <.001）和弹性模量（S：135 +/- 4）上均显示出较低的值GPa; R：183 +/- 6 GPa; P = .035）。结论：在本研究条件下，在贱金属合金中添加焊料不会影响金属-陶瓷的结合强度。

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