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首页> 外文期刊>The Journal of Prosthetic Dentistry >Color change during the surface preparation stages of metal ceramic alloys.
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Color change during the surface preparation stages of metal ceramic alloys.

机译：金属陶瓷合金表面处理阶段的颜色变化。

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STATEMENT OF PROBLEM: Even though metal ceramic restorations (MCRs) are widely used by clinicians, the influence of the metal on the color of overlaying porcelain is unknown. PURPOSE: The purpose of this study was to analyze the color alterations of different types of metal ceramic alloys during several stages of metal surface preparation and to determine the effect of those changes on the resulting color of opaque porcelain (OP). MATERIAL AND METHODS: Seven different types of alloys (3 base metal, 3 noble, and 1 high noble) were used to prepare disk-shaped specimens (1 mm x 10 mm, n=3), followed by OP application (0.1 mm). L*a*b* values of specimens were recorded after different stages of metal surface preparation (ingot, after casting, after oxidation, and after the OP application) in addition to the shade tab of OP B1 (target shade). L*a*b* values of alloys were measured from the ingot structure to the OP application stage and statistically analyzed (Repeated measures ANOVA, and Bonferroni corrected paired t test, alpha=.05). L*a*b* values of OP applied groups and the OP shade tab (target shade) were analyzed (1-way ANOVA with Dunnett's multiple comparison test, alpha=.05). The color differences of the target shade both before and after OP application were calculated and statistically analyzed (1-way ANOVA, Ryan-Einot-Gabriel-Welsch Multiple Range Test, alpha=.05). RESULTS: The L* values of all alloys changed significantly after each stage except for 2 alloys (V-Deltaloy SF (N-VDSF)) and (Gnathos Plus (HN-GP)) after casting and airborne-particle abrasion (P<.05). The a* value of all alloys increased after casting. Changes in the a* coordinate were significant except for one of the base metal alloys (P<.05). The a* coordinate changes of alloys showed variation in direction after oxidation and OP application (P<.05). The b* coordinate changes of alloys showed variation in direction after each stage (P<.05). The L*a*b* values of some OP applied alloys were significantly different from that of the OP shade tab (P<.05). Color difference values (DeltaE (OP applied alloy-target shade)) of 2 OP-applied alloys (Cerapall 2 (N-CP2) and Ceradelta (N-CD)) were significantly different (P<.05) and higher than the other OP-applied alloys. CONCLUSIONS: The achromatic color behavior of different alloys was all in the same direction at all metal surface preparation stages. The chromatic behavior of the different alloys was primarily towards the same direction after casting and airborne-particle abrasion, whereas it varied after oxidation and OP application. The color difference of OP for all alloys, regardless of their type, was not visually perceivable when compared to the target shade (DeltaE<2.6).
机译：问题陈述：尽管临床医生广泛使用金属陶瓷修复体（MCR），但金属对覆盖瓷器颜色的影响尚不清楚。目的：本研究的目的是分析在金属表面处理的多个阶段中不同类型的金属陶瓷合金的颜色变化，并确定这些变化对不透明瓷（OP）最终颜色的影响。材料与方法：使用七种不同类型的合金（3种贱金属，3种贵金属和1种高贵金属）制备盘状试样（1毫米x 10毫米，n = 3），然后进行OP涂覆（0.1毫米） 。除了OP B1的阴影选项卡（目标阴影）以外，在金属表面准备的不同阶段（锭，铸造后，氧化后和OP应用之后）还记录了样品的L * a * b *值。从铸锭结构到OP应用阶段测量合金的L * a * b *值并进行统计分析（重复测量ANOVA和Bonferroni校正配对t检验，α= .05）。分析了OP应用组和OP阴影选项卡（目标阴影）的L * a * b *值（采用Dunnett多重比较测试的1向ANOVA，α= .05）。计算并统计分析在应用OP之前和之后目标色的色差（1向ANOVA，Ryan-Einot-Gabriel-Welsch多范围测试，alpha = .05）。结果：除铸造和气载颗粒磨损（P <。 05）。铸造后所有合金的a *值均增加。除了一种贱金属合金（P <.05）以外，a *坐标的变化都很大。合金的a *坐标变化显示出氧化和OP施加后方向的变化（P <.05）。合金的b *坐标变化在每个阶段后均显示方向变化（P <.05）。某些OP涂覆合金的L * a * b *值与OP阴影选项卡的L * a * b *值显着不同（P <.05）。两种采用OP的合金（Cerapall 2（N-CP2）和Ceradelta（N-CD））的色差值（DeltaE（采用OP的合金-目标阴影））显着不同（P <.05）并且高于其他应用于OP的合金。结论：在所有金属表面制备阶段，不同合金的消色差行为都在相同的方向上。铸造和气载颗粒磨损后，不同合金的色度行为主要朝着相同的方向，而在氧化和施加OP后，其色度行为却发生变化。与目标阴影（DeltaE <2.6）相比，所有合金的OP色差（无论其类型如何）在视觉上都无法察觉。

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