Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague.
Dent Mater J. 2023 May 30;42(3):343-350. doi: 10.4012/dmj.2022-199. Epub 2023 Jan 28.
The color-matching ability of single-shade composites Omnichroma (OMN) and Omnichroma Flow (OCF) is ensured by structural color, which arises from monodisperse 260 nm spherical fillers. This study evaluated how filler load influences the color adjustment potential of composite restorations to human teeth of various shades. The performance of composites containing the 260 nm spherical fillers -OMN (79 wt%), OCF (71 wt%), and experimental composites R1 (65 wt%), and R2 (60 wt%)- was compared to two conventional A2-shade composites and a transparent composite. Additionally, the translucency parameter, spectral reflectance, and light transmission properties were assessed. Composites with a lower load of the 260 nm spherical fillers exhibited lower light diffusion and lower reflectance in the yellow-to-red range (580-650 nm), which is characteristic for the structural color of OMN and OCF. The best color adjustment was achieved with OCF, presumably due to its high translucency and uniform spectral reflectance.
单色调复合材料 Omnichroma（OMN）和 Omnichroma Flow（OCF）的配色能力是通过结构色来保证的，这种结构色源于单分散的 260nm 球形填料。本研究评估了填料负载如何影响复合材料修复体对不同色调人牙的颜色调整潜力。比较了含有 260nm 球形填料的复合材料（OMN：79wt%，OCF：71wt%，实验性复合材料 R1：65wt%，R2：60wt%）的性能与两种传统的 A2 色调复合材料和一种透明复合材料。此外，还评估了透光率参数、光谱反射率和透光性能。具有较低 260nm 球形填料负载的复合材料表现出较低的光扩散和在黄色到红色范围内（580-650nm）的反射率较低，这是 OMN 和 OCF 结构色的特征。OCF 实现了最佳的颜色调整，可能是由于其高透光率和均匀的光谱反射率。
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