Mechanical properties of experimental dental composites containing a combination of mesoporous and nonporous spherical silica as fillers
Mechanical properties of experimental dental composites containing a combination of mesoporous and nonporous spherical silica as fillers
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DOI：
10.1016/j.dental.2008.07.012
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发表时间：
2009-03-01
期刊：
影响因子：
5
通讯作者：
Wei, Yen
中科院分区：
文献类型：
--
作者：
Samuel, Solomon Praveen;Li, Shuxi;Wei, Yen
目标。介孔填料已被研究用于牙科复合材料，因为它们具有产生微机械填料/树脂基质界面粘合的潜力。这种微机械键合可以消除对填料进行硅烷处理以实现界面化学键合的需要，因为界面化学键合在口腔环境中容易水解。在微机械粘合的情况下，牙科聚合物链以机械方式穿过填料中的纳米尺寸通道（如“项链”）。使用非表面活性剂模板法合成的介孔二氧化硅和无孔球形二氧化硅（500 nm）的组合用于制备实验牙科复合材料。本研究中使用的多孔二氧化硅包含互连的孔和通道，而不是包含表面孔的多孔填料。评估了这些复合材料的压缩强度、压缩模量、弯曲模量和弯曲强度。结果。结果表明，含有介孔和无孔填料组合的复合材料比单独含有这些填料的复合材料具有更好的机械性能。结果表明，介孔和无孔材料的组合可用于制备可抵抗水解和磨损的更强的牙科材料。 (C) 2008 年由 Elsevier Ltd 代表牙科材料学会出版。版权所有。
Objectives. Mesoporous fillers have been investigated for use in dental composites because of their potential for creating micromechanical filler/resin matrix interphase bonding. Such a micromechanical bonding could eliminate the need for the silane treatment of fillers for interfacial chemical bonding that is prone to hydrolysis in the oral environment. in the case of micromechanical bonding, dental polymer chains are threaded mechanically (like a "necklace") through nanosized channels in the fillers.Methods. A combination of mesoporous silica, which was synthesized using the nonsurfactant templating method, and nonporous spherical silica (500 nm) was used to prepare experimental dental composites. The porous silica used in this study contained interconnected pores and channels as opposed to porous fillers containing surface pores. The compressive strength, compressive modulus, flexural modulus, and flexural strength of these composites were evaluated.Results. The results showed that composites containing a combination of mesoporous and nonporous fillers have better mechanical properties than the composites having either of these fillers alone.Significance. The results showed that a combination of mesoporous and nonporous materials can be used to prepare stronger dental materials that may resist hydrolysis and wear. (C) 2008 Published by Elsevier Ltd on behalf of Academy of Dental Materials. All rights reserved.