SiO2薄膜对镍铬合金烤瓷冠色彩再现的影响

摘要

Objective To study whether SiO2 films will influence the color of Ni-Cr metal ceramic restorations.Methods For the film plating experimental group, Sol-gel method was employed to apply SiO2 films to the surface of the Ni-Cr copings, while no coating was applied for the non-film-plating control group. Veneering porcelains were then applied subsequently, and a total of 12 B2-colorod maxillary incisor metal ceramic crowns were fabricated with 6 crowns in each group. A ShadeEye Ncc computer-aided colorimeter was employed to measure the shade of the samples, as well as 6 B2(Vitapan classical vita color tabs) shade standards. The color was expressed as CIE-1976-Lab coordinates. Results There was a statistically significant color difference between all metal ceramic crowns and the B2 shade standards(ΔE＞l.5). The L*, a*, b* values of all crowns were higher than those of the B2 shade standards, and the crowns were typically yellower or redder. While neither significant color difference nor difference in shade values was observed between the film plating experimental group and non-film-plating control group (ΔE＜1.5). Conclusion SiO2 films applied to the Ni-Cr copings by means of Sol-gel technique do not impact the final color of the metal ceramic restorations.%目的 探讨SiO<,2>薄膜是否会影响镍铬合金烤瓷修复体的色泽.方法 采用溶胶-凝胶法在镍铬合金烤瓷基底冠表面镀SiO<,2>薄膜,以此将制作的12颗 1 B2色烤瓷冠分为基底冠镀膜组和无镀膜组,每组6个样本.用ShadeEyeNcc电脑比色仪测量基底冠镀膜组和无镀膜组与6个B2(Vitapan classical比色板)比色片的色度值,并进行比较.结果 基底冠镀膜组和无镀膜组修复体与B2比色片有明显色差(AE>1.5),修复体L*、a*、b*值均较B2比色片大,亮度高,颜色偏黄红色.而基底冠镀膜组与无镀膜组修复体间无明显色差(AE<1.5),各色度值之间差异无统计学意义.结论 镍铬合金烤瓷修复体基底冠镀SiO<,2>薄膜后不影响修复体的色泽再现.