20 October 2009 Development of novel low shrinkage dental nanocomposite
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Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749319 (2009) https://doi.org/10.1117/12.843643
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China
Abstract
It has been the focus to develop low shrinkage dental composite resins in recent ten years. A major difficulty in developing low shrinkage dental materials is their deficiency in mechanical properties to clinical use. This paper reviews the present investigations of low shrinkage dental composite resins and attempts to develop a novel system with multifunctional POSS incorporated. In this paper, it is especially interesting to evaluate the influences of shrinkage with different weight percentage of POSS (0~15wt%) incorporated in dental composite resins. Their double bond conversions are evaluated and their microstructures are characterized with Fourier-transform infra-red spectroscopy and X-ray diffraction. Their mechanical properties are also presented in this paper. The results show that the shrinkage of nanocomposites with POSS can be reduced effectively from 3.53% to 2.18%. The mechanical properties of this novel system, such as strength, hardness and toughness, are also enhanced greatly. Especially with 2wt%POSS incorporated, the best integrative improved effects are revealed. The mechanism of shrinkage is discussed.
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Yi Sun, Yi Sun, Xiaorong Wu, Xiaorong Wu, Yanju Liu, Yanju Liu, Weili Xie, Weili Xie, Shouhua Sun, Shouhua Sun, } "Development of novel low shrinkage dental nanocomposite", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749319 (20 October 2009); doi: 10.1117/12.843643; https://doi.org/10.1117/12.843643
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