Department of Restorative Dentistry, Loma Linda University School of Dentistry, 11092 Anderson Street, Loma Linda, California 92350, USA.
J Dent. 2012 Dec;40 Suppl 2:e47-54. doi: 10.1016/j.jdent.2012.09.009. Epub 2012 Sep 21.
To assess the color stability of high-strength acrylic resin denture teeth after exposure to red wine, coffee and artificial ageing.
Four different shades of acrylic resin denture teeth were selected from three manufacturers. The teeth were evaluated in two phases: Phase I, upon staining for 7 days in distilled water (control Group A), red wine (experimental Group B) and coffee (experimental Group C), and Phase II, upon artificial ageing in a Weather-Ometer for a total exposure of 150 kJ/m(2) (control Group A; Phase I). Denture tooth positioning jigs were fabricated and color data recorded by means of an intra-oral spectrophotometer and expressed using the Commission Internationale d'Eclairage (CIE) Lab* color notation system. Means and standard deviations were determined. The staining data were analysed by three-way ANOVA, while the artificial ageing data were analysed by two-way ANOVA. Fisher's PLSD intervals were calculated at a significance level of P ≤ 0.05.
In the staining experiment, the main effects of stains and denture teeth and the two-way and three-way interactions among stains, denture teeth and shades were significant (P ≤ 0.05). The same was true for the main effects of denture teeth and shades and their interactions in the ageing experiment. The smallest overall color change upon staining in red wine was recorded for Vita Physiodens denture teeth (ΔE*=0.9 ± 0.4), followed by SR Vivodent PE 1.2 (0.6) and Portrait IPN 2.4 (0.6). Corresponding values for staining in coffee were 2.0 (0.6), 1.7 (1.0) and 1.8 (0.8), while ageing-dependent changes in color were 1.7 (0.4), 2.4 (0.8) and 1.1 (0.4) for Portrait IPN, SR Vivodent PE and Vita Physiodens teeth, respectively.
Although the null hypothesis has been partially rejected, because some statistically significant changes in color and color coordinates occurred upon staining and ageing, all evaluated denture teeth exhibited good color stability compared to the 50:50% acceptability threshold used in data interpretation.
Selection of a color stable and stain-resistant denture tooth can contribute to denture longevity and overall patient satisfaction.
评估高强度丙烯酸树脂义齿在暴露于红酒、咖啡和人工老化后颜色稳定性。
从三个制造商中选择了四个不同颜色的丙烯酸树脂义齿。这些牙齿在两个阶段进行评估：第一阶段，在蒸馏水中（对照组 A）、红酒（实验组 B）和咖啡（实验组 C）中染色 7 天后，第二阶段，在 Weather-Ometer 中进行人工老化，总暴露量为 150 kJ/m²（对照组 A；第一阶段）。使用口腔分光光度计制作义齿牙定位夹具并记录颜色数据，并使用国际照明委员会（CIE）Lab*颜色标记系统表示。确定平均值和标准偏差。通过三因素方差分析分析染色数据，通过双因素方差分析分析人工老化数据。Fisher's PLSD 间隔在显著性水平 P ≤ 0.05 时计算。
在染色实验中，染色、义齿牙和颜色之间的主效应以及染色、义齿牙和颜色之间的双向和三向相互作用均具有统计学意义（P ≤ 0.05）。在老化实验中，义齿牙和颜色及其相互作用的主效应也是如此。在红酒中染色时，Vita Physiodens 义齿牙的整体颜色变化最小（ΔE*=0.9 ± 0.4），其次是 SR Vivodent PE 1.2（0.6）和 Portrait IPN 2.4（0.6）。在咖啡中染色的相应值为 2.0（0.6）、1.7（1.0）和 1.8（0.8），而在人工老化过程中颜色的变化分别为 1.7（0.4）、2.4（0.8）和 1.1（0.4）对于 Portrait IPN、SR Vivodent PE 和 Vita Physiodens 牙齿。
尽管由于在染色和老化过程中颜色和颜色坐标发生了一些具有统计学意义的变化，部分假设被否定，但与数据解释中使用的 50:50%可接受性阈值相比，所有评估的义齿牙均表现出良好的颜色稳定性。
选择颜色稳定且耐染色的义齿牙可以延长义齿的使用寿命并提高患者的整体满意度。
