抄録
Color degradation of facial prosthetic silicone material is a severe problem for patients. Many factors have been examined, including the inherent chemical instability of silicones and pigments, exposure to cleansing agents, sunlight and dust. Ultraviolet exposure is one of the important factors of degradation. A novel silicone material has been developed through JAMP. This study reports the color changes caused by ultraviolet exposure. Samples were fabricated using two kinds of silicone material and intrinsic color using pigments and nylon flocking. The samples were exposed to artificial ultraviolet light of 2,313,900 kJ/m2 in total, which is equivalent to one year of outdoor use in Japan. The color change before and after exposure was evaluated using a spectrophotometer. In both materials, hue and chroma showed significant differences between before and after exposure rather than brightness. The samples including nylon flocking as intrinsic coloring were more affected by ultraviolet exposure than the samples with pigments.
