Department of Chemistry, Université de Montréal, CP 6128, Succ. Centre-ville, Montreal, QC, Canada.
Department of Chemistry, Université de Montréal, CP 6128, Succ. Centre-ville, Montreal, QC, Canada.
Dent Mater. 2017 Mar;33(3):280-287. doi: 10.1016/j.dental.2016.12.008. Epub 2017 Jan 13.
The aim of this study was to formulate resin-based composites using spherical silica particulate fillers with graded size (75, 150, 350, 500, and 1000nm), and to evaluate the influence of their size and loading on the mechanical and light transmission properties of the resulting material.
A series of five spherical silica fillers were synthesized, and then formulated with BisGMA/TEGDMA or UDMA/TEGDMA resins. These were then tested for maximum filler loading, flexural strength and modulus, as well as transparency and depth of cure.
Low dispersity spherical silica particles of 75, 150, 350, 500, and 1000nm were synthesized. Maximum loading was 70wt% for the three largest particle, and decreased for the smaller sizes, where UDMA-based resins allowed slightly higher loading. When maximally loaded, the largest particle sizes produced the highest flexural properties. However, when using the same loading, all filler sized produced similar flexural strengths and moduli. The optical properties and depth of cure were increased as the filler size decreased.
While hybrid filler particles are the norm in commercial materials, by studying and understanding the influence of individual components on the material properties, we can finely tune the properties of the materials as desired.
本研究的目的是通过使用具有分级粒径（75、150、350、500 和 1000nm）的球形二氧化硅颗粒填料来制备树脂基复合材料，并评估其粒径和负载量对所得材料的机械性能和透光性能的影响。
合成了一系列五种球形二氧化硅填料，然后用 BisGMA/TEGDMA 或 UDMA/TEGDMA 树脂进行配方设计。然后对其最大填料负载量、弯曲强度和模量以及透明度和固化深度进行测试。
合成了低分散性的 75、150、350、500 和 1000nm 球形二氧化硅颗粒。三种最大粒径的最大负载量为 70wt%，而粒径较小的负载量则降低，其中 UDMA 基树脂允许更高的负载量。在最大负载量时，最大粒径的颗粒产生了最高的弯曲性能。然而，当使用相同的负载量时，所有填料粒径都产生了相似的弯曲强度和模量。光学性能和固化深度随着填料粒径的减小而增加。
虽然混合填料颗粒是商业材料中的常规做法，但通过研究和理解单个成分对材料性能的影响，我们可以根据需要精细调整材料的性能。
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