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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effects of dental laboratory processing variables and in vitro testing medium on the porcelain adherence of high-palladium casting alloys.
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Effects of dental laboratory processing variables and in vitro testing medium on the porcelain adherence of high-palladium casting alloys.

机译：牙科实验室加工变量和体外测试介质对高钯铸造合金瓷附着的影响。

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摘要

PURPOSE: This study assessed the effects of dental laboratory processing variables and testing medium on porcelain adherence of representative high-palladium alloys. MATERIAL AND METHODS: The processing variables were recasting two and three times, porcelain stripping with hydrofluoric acid and rebuilding, and changing the recommended oxidation procedures. The testing medium was air for these four groups and the nontreatment group. In the last group, the specimens were stored and tested in artificial saliva. The metal ceramic specimens were fractured with biaxial flexure in constant strain. The area fraction of adherent porcelain (%) was calculated with a standardized spectrometric technique. A gold-palladium alloy served as the control. RESULTS: Recasting without adding new alloy negatively affected some high-palladium alloys. Porcelain stripping did not cause a decrease in adherence of the tested alloys. The alternate oxidation treatment reduced significantly the porcelain adherence of the Au-Pd and one Pd-Cu-Ga alloy. Storage and testing in artificial saliva did not significantly affect the porcelain adherence of the alloys. The Au-Pd alloy exhibited the highest porcelain adherence.
机译：目的：本研究评估了牙科实验室加工变量和测试介质对代表性高钯合金瓷附着的影响。材料和方法：工艺变量分别进行了两次和三次浇铸，用氢氟酸汽提和重建瓷器，并更改了推荐的氧化程序。对于这四个组和非治疗组，测试介质为空气。在最后一组中，将标本存储在人造唾液中并进行测试。金属陶瓷试样在恒定应变下具有双轴弯曲断裂。附着瓷的面积分数（％）用标准的光谱技术计算。以金-钯合金作为对照。结果：不添加新合金进行重铸会对某些高钯合金产生负面影响。瓷汽提并没有降低测试合金的附着力。交替氧化处理显着降低了Au-Pd和一种Pd-Cu-Ga合金的瓷粘附性。人工唾液中的储存和测试对合金在瓷器上的附着力没有显着影响。 Au-Pd合金具有最高的瓷附着性。

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