Ergun Gulfem, Nagas Isil Cekic
Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Türkiye.
Eur J Dent. 2007 Jul;1(3):144-51.
The aim of this study was to compare the color stability of three acrylic based hard liners (Ufi gel hard, Dura-Liner II, Tokuso Rebase) and two silicone based soft liners (Ufi gel permanent, Molloplast B) by using the colorimeter.
Sixty disc-shaped samples, with uniform size of 10 mm diameter and 2 mm in thickness were fabricated for each material. Thirty samples were made as control group in distilled water and the remaining thirty samples were weathered in accelerated aging chamber. Color measurements were made before and after distilled water and aging. Data were statistically analyzed using nonparametric Kruskal-Wallis and Mann-Whitney U tests.
Data showed that there are significant differences among materials in both after distilled water and aging treatments (P<.001). These results indicated that the most discolored liner material was Dura Liner II after aging (DeltaE*=16.30) and the least discolored material was Ufi gel permanent after distilled water (DeltaE*=0.41).
Based on the results of this study, silicone based liner materials are considered to be more color stable than acrylic based liner materials.
本研究旨在通过使用色度计比较三种丙烯酸基硬衬垫材料（Ufi凝胶硬衬垫、Dura-Liner II、Tokuso Rebase）和两种硅酮基软衬垫材料（Ufi凝胶永久性衬垫、Molloplast B）的颜色稳定性。
为每种材料制作60个尺寸均匀的圆盘形样本，直径10毫米，厚度2毫米。30个样本作为对照组置于蒸馏水中，其余30个样本在加速老化箱中进行老化处理。在蒸馏水浸泡和老化前后进行颜色测量。数据采用非参数Kruskal-Wallis检验和Mann-Whitney U检验进行统计学分析。
数据显示，在蒸馏水浸泡和老化处理后，材料之间均存在显著差异（P<0.001）。这些结果表明，老化后变色最严重的衬垫材料是Dura Liner II（ΔE*=16.30），蒸馏水浸泡后变色最少的材料是Ufi凝胶永久性衬垫（ΔE*=0.41）。
基于本研究结果，硅酮基衬垫材料被认为比丙烯酸基衬垫材料具有更高的颜色稳定性。
