Five-year color changes of light-cured resin composites: influence of light-curing times.
Five-year color changes of light-cured resin composites: influence of light-curing times.
复制标题
光固化树脂复合材料五年颜色变化：光固化时间的影响。
DOI：
10.1016/s0109-5641(99)00046-9
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Yumiko Hosoya
中科院分区：
文献类型：
--
作者：
Yumiko Hosoya
目的本研究的目的是调查在特定的时间段内，光固化时间对光固化树脂复合材料颜色变化的影响。（3 M Dental Products）光固化树脂复合圆盘（色调：U、Y、DY、L、G、UO、YO），直径为10 mm，厚度为1 mm，通过1 mm厚的玻璃板进行20、40和120 s的曝光。将样本在37°C下储存在人工唾液中。在固化后立即和5年内每6个月后，使用快速分光光度计测量样本的比色值，并使用光阱和白色比色板进行支持。结果在3a 6个月~ 5a的时间范围内，所有色度的Δ E值均随固化时间的延长而增加，且Δ E值随固化时间的延长而增加。然而，a/B/b值随时间流逝而在色调和光固化时间之间不同。在20 s和120 s固化时间组中，所有色调的不透明度%随时间的推移而增加，持续4年或5年。
ObjectivesThe purpose of this study was to investigate the influence of light-curing times on the color changes of light-cured resin composites, over specified periods of time.MethodsSilux Plus (3M Dental Products) light-cured resin composite disks (shades: U, Y, DY, L, G, UO, YO), 10mm in diameter and 1mm in thickness were prepared with 20, 40, and 120s of light exposure through a 1mm thick glass plate. The specimens were stored in artificial saliva at 37°C. Colorimetric values of the specimens immediately after curing and after every 6months for 5years were measured backed by a light trap, and a white colored plate using a fast spectrophotometer. The CIE 1976 L∗a∗b∗color system was used for the determination of the color difference.ResultsFor specimens backed by a white colored plate, the Δ E∗abof all shades increased for 3years and 6months to 5years, to the time elapsed during all curing times. However, the a∗b∗values to the time elapsed differed among the shades and light curing times. In the 20 and 120s curing time groups, the opacity% of all shades increased for 4 or 5years to the time elapsed.SignificanceThe modes of color changes of Silux Plus resins differed among the shades and light curing times.