dos Santos Daniela Micheline, Goiato Marcelo Coelho, Sinhoreti Mário Alexandre Coelho, Fernandes Aline Ursula Rocha, Ribeiro Paula do Prado, Dekon Stefan Fiuza de Carvalho
Faculty of Dentistry of Araçatuba, Department of Dental Materials and Prosthodontics, São Paulo State University, Brazil.
J Craniofac Surg. 2010 Jan;21(1):54-8. doi: 10.1097/SCS.0b013e3181c3b58e.
Color stability of resin and silicone is an important factor for longevity of facial prostheses. The aim of this study was to evaluate the color stability of resins and silicone for facial prostheses. Three brands of acrylic resin and 1 of facial silicone were evaluated considering pigment incorporation for the colorless materials. Ten samples of each material were fabricated and submitted to measurements of chromatic alteration initially and after 252, 504, and 1008 hours of weathering through visual analysis and spectrophotometry. Data were evaluated by analysis of variance and Tukey test (P < 0.05). Results showed a statistically significant difference in color alteration among materials independent of aging. According to visual analysis, the color difference between pigmented and colorless Silastic MDX4-4210 and between pigmented and colorless Classico acrylic resin was statistically significant for the 3 weathering periods. Aging for 1008 hours represented a significant influence on color alteration of all resins. All materials presented chromatic alteration after accelerated artificial aging.
树脂和硅酮的颜色稳定性是面部假体使用寿命的一个重要因素。本研究的目的是评估用于面部假体的树脂和硅酮的颜色稳定性。考虑到无色材料的色素掺入情况，对三个品牌的丙烯酸树脂和一种面部硅酮进行了评估。每种材料制作了10个样本，并通过视觉分析和分光光度法在初始阶段以及经过252、504和1008小时的老化后对颜色变化进行测量。数据通过方差分析和Tukey检验进行评估（P < 0.05）。结果显示，与老化无关，材料之间的颜色变化存在统计学上的显著差异。根据视觉分析，在三个老化阶段，有色和无色的Silastic MDX4 - 4210以及有色和无色的Classico丙烯酸树脂之间的颜色差异具有统计学意义。1008小时的老化对所有树脂的颜色变化产生了显著影响。经过加速人工老化后，所有材料都出现了颜色变化。
