【摘要】 目的研究不同厚度硅铝包覆纳米Ti O₂硅橡胶盖膜对MDX4-4210赝复体硅橡胶褪色过程的影响,探讨此方法对提高颜面赝复体硅橡胶色彩稳定性的有效性,并提供理论基础。方法模拟日光老化条件下,以MDX4-4210硅橡胶为基质,硅铝包覆纳米Ti O₂为遮色剂,镉红油画颜料为着色剂,观察比较高浓度镉红油画颜料硅橡胶主体加盖不同厚度（0、0.5、1.0 mm）硅铝包覆纳米Ti O₂硅橡胶膜试件老化前后L*a*b*值。结果不同厚度0.1%硅铝包覆纳米Ti O₂盖膜的试件ΔE、Δa随着厚度的增加ΔE、Δa逐渐减小,即总色差、红色褪色逐渐减小,有显著性差异（P<0.05）。而ΔL,Δb随着厚度的增加逐渐增大,即变暗、变黄的程度逐渐增大,有显著性差异（P<0.05）。结论加盖不同厚度硅铝包覆纳米Ti O₂硅橡胶膜的方法对延缓赝复体硅橡胶褪色具有一定的作用,为提高赝复体硅橡胶色彩稳定性提供了新思路。更多还原

【Abstract】 Objective To study the color stability of prosthesis silicone elastomer covered by nano-Ti O₂ membrane caps coated by silica alumina at different thickness,and to explore the effectiveness of this method on improving the color stability of facial prostheses silicone rubber,as well as to provide a theoretical basis. Methods Using MDX4-4210 silicone elastomer as substrate,nano-Ti O₂coated with Si and Al as masking agent,and cadmium red oil paint as coloring agent,L* a* b* values of nano-Ti O₂ membrane cap specimen coated by silica alumina at different thickness（ 0,0. 5,1. 0 mm） before and after aging were observed. Results 0. 1% silica-aluminacoated nano-Ti O₂ membrane cap specimen ΔE,Δa gradually decreased as the thickness increased（ P < 0. 05）,while ΔL,Δb gradually increased as thickness increased（ P < 0. 05）. Conclusion Coating nano-Ti O₂ membrane caps with silica alumina at different thickness played a role in delaying the fading of prosthesis silicone elastomer,which provided inspiration for improving the color stability of silicone elastomer prosthesis.更多还原