Buyukyilmaz S, Ruyter I E
Department of Prosthodontics, Faculty of Dentistry, Ege University, Izmir, Turkey.
Int J Prosthodont. 1994 Jul-Aug;7(4):372-82.
One light-polymerized, three heat-polymerized, and three autopolymerized denture base polymers were exposed to coffee, tea, water at 50 degrees C +/- 1 degree C, as well as artificial sunlight and water, and evaluated for color stability. The color characteristics were determined using a computer-controlled spectrophotometer. Water sorption and solubility were assessed, and the materials were also chemically characterized. Coffee and tea stained the denture base materials superficially. Brushing with toothpaste and moderate grinding reduced discoloration to an acceptable level. All materials were relatively color stable when immersed in water at 50 degrees C +/- 1 degree C. The materials behaved differently when exposed to artificial sunlight and water.
一种光固化、三种热固化和三种自凝义齿基托聚合物分别暴露于咖啡、茶、50摄氏度正负1摄氏度的水、人造阳光和水中，并对其颜色稳定性进行评估。使用计算机控制的分光光度计测定颜色特征。评估吸水率和溶解性，并对材料进行化学表征。咖啡和茶会使义齿基托材料表面染色。用牙膏刷牙和适度打磨可将变色降低到可接受的水平。所有材料在50摄氏度正负1摄氏度的水中浸泡时颜色相对稳定。当暴露于人造阳光和水中时，这些材料的表现有所不同。
