不同高钯金属陶瓷合金对不透明瓷颜色的影响。

Effect of different high-palladium metal-ceramic alloys on the color of opaque porcelain.

作者信息

Stavridakis M M, Papazoglou E, Seghi R R, Johnston W M, Brantley W A

机构信息

Ohio State University College of Dentistry, Columbus, OH, USA.

出版信息

J Prosthodont. 2000 Jun;9(2):71-6. doi: 10.1111/j.1532-849x.2000.00071.x.

DOI:10.1111/j.1532-849x.2000.00071.x

PMID:11070133

Abstract

PURPOSE

The purpose of this study was to assess the effect of different high-palladium alloys on the resulting color of opaque porcelain. Three Pd-Cu-Ga alloys, Spartan Plus (S; Williams Dental Co/Division of Ivoclar North America, Amhest, NY), Liberty (B; J.F. Jelenko & Co, Armonk, NY), and Freedom Plus (F; J.F. Jelenko & Co); 4 Pd-Ga alloys, Legacy (L; J.F. Jelenko & Co), IS 85 (I; Williams Dental Co), Protocol (P; Williams Dental Co), and Legacy XT (X; J.F. Jelenko & Co); and a Pd-Ag alloy, Super Star (T; J.F. Jelenko & Co), were examined. The Au-Pd alloy Olympia (O; J.F. Jelenko & Co) served as the control.

MATERIALS AND METHODS

Three cast 16-mm discs, 1-mm thick, were prepared from each of the alloys. After metallurgically polishing and air-abrading, the specimens were oxidized following the manufacturer's recommendations. Shade B1 opaque porcelain (Vita-Omega; Vident, Baldwin Park, CA) was applied at a final thickness of 0.1 mm using a mold. After 2 opaque porcelain firing cycles, the surfaces were air-abraded. The colors of the specimens were measured using a colorimeter and expressed in Commission International de l'Eclairage (CIE) Lab* coordinates. Color differences (delta E) were determined between the control and each experimental group. Analysis of Variance and Tukey-Kramer tests were performed on the delta E data.

RESULTS

The 3 Pd-Cu-Ga alloys showed significantly greater (p < .01) delta E values (S = 2.8 +/- 1.1, B = 3.0 +/- 0.6, and F = 2.1 +/- 0.2) than the remaining 5 experimental groups (L = 0.7 +/- 0.5, I = 0.7 +/- 0.4, P = 0.7 +/- 0.2, X = 0.7 +/- 0.4, and T = 0.7 +/- 0.5). The directions of the significant color changes were relatively equally distributed along the L*, a*, and b* axes, and all delta L*, delta a*, and delta b* values were negative (lower value, more green and blue relative to control O).

CONCLUSIONS

This work suggests that a 0.1-mm-thick layer of opaque porcelain in the Pd-Cu-Ga alloys studied, did not reliably reproduce the color of porcelain.

摘要

目的

本研究旨在评估不同高钯合金对不透明瓷最终颜色的影响。研究了三种钯 - 铜 - 镓合金，即Spartan Plus（S；Williams Dental Co / Ivoclar North America分部，纽约州阿姆赫斯特）、Liberty（B；J.F. Jelenko & Co，纽约州阿蒙克）和Freedom Plus（F；J.F. Jelenko & Co）；四种钯 - 镓合金，即Legacy（L；J.F. Jelenko & Co）、IS 85（I；Williams Dental Co）、Protocol（P；Williams Dental Co）和Legacy XT（X；J.F. Jelenko & Co）；以及一种钯 - 银合金Super Star（T；J.F. Jelenko & Co）。金 - 钯合金Olympia（O；J.F. Jelenko & Co）作为对照。

材料与方法

从每种合金制备三个铸造的16毫米圆盘，厚度为1毫米。经过金相抛光和空气喷砂处理后，按照制造商的建议对试样进行氧化处理。使用模具施加最终厚度为0.1毫米的B1色不透明瓷（Vita - Omega；Vident，加利福尼亚州鲍德温公园）。经过两次不透明瓷烧制循环后，对表面进行空气喷砂处理。使用色度计测量试样的颜色，并以国际照明委员会（CIE）Lab*坐标表示。确定对照组与每个实验组之间的颜色差异（ΔE）。对ΔE数据进行方差分析和Tukey - Kramer检验。

结果

三种钯 - 铜 - 镓合金的ΔE值（S = 2.8±1.1，B = 3.0±0.6，F = 2.1±0.2）明显高于其余五个实验组（L = 0.7±0.5，I = 0.7±0.4，P = 0.7±0.2，X = 0.7±0.4，T = 0.7±0.5）（p <.01）。显著颜色变化的方向在L轴、a轴和b轴上相对均匀分布，并且所有ΔL、Δa和Δb值均为负数（值越低，相对于对照O越绿和越蓝）。