Department of Dentistry Materials and Prosthesis, University of the State of São Paulo, Rua José Bonifácio 1193, Araçatuba, São Paulo, SP, Brazil.
Cont Lens Anterior Eye. 2010 Oct;33(5):215-8. doi: 10.1016/j.clae.2010.04.004. Epub 2010 May 7.
The purpose of this study was to investigate color change of irises obtained by both printed digital image and painted with gouache, acrylic and oil paints, after polymerization and accelerated aging.
Eight samples simulating ocular prostheses were fabricated. Each sample was constituted by one disc of N1 colored acrylic resin and one disc of colorless acrylic resin with the iris interposed between the discs. The irises in brown and blue color were obtained by painting or by digital image. The specimens' colors were measured with a spectrophotometer using the CIE Lab* system, at baseline (B), after polymerization (P), and after 504h (A(1)) and 1008h (A(2)) of accelerated aging. The data were evaluated by 2-way repeated-measures ANOVA and the Tukey's HSD test (alpha=.05).
Color change was observed in all samples both after polymerization and after accelerated aging. The different periods of accelerated aging did not influence on color change for the irises painted with blue oil paint. The polymerization promoted a statistical significant effect on the iris color stability for all painting techniques in comparison to all accelerated aging periods.
After accelerated aging the oil painting technique showed the greatest color stability while the printed digital images technique the worst.
本研究旨在探讨经聚合和加速老化后，印刷数字图像和油画颜料、丙烯颜料和油画颜料绘制的虹膜的颜色变化。
制作了 8 个模拟眼假体样本。每个样本由一个 N1 色丙烯酸树脂圆盘和一个无色丙烯酸树脂圆盘组成，虹膜夹在两个圆盘之间。棕色和蓝色虹膜通过绘画或数字图像获得。使用 CIE Lab*系统，分光光度计在基线（B）、聚合后（P）以及加速老化 504h（A(1)）和 1008h（A(2)）后测量样本的颜色。数据采用双因素重复测量方差分析和 Tukey 的 HSD 检验（α=.05）进行评估。
聚合后和加速老化后，所有样本的颜色均发生变化。不同的加速老化期对蓝色油画颜料绘制的虹膜颜色变化没有影响。与所有加速老化期相比，聚合对所有绘画技术的虹膜颜色稳定性均有统计学显著影响。
加速老化后，油画颜料技术显示出最大的颜色稳定性，而印刷数字图像技术则最差。
