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Synthesis and Characteristics of Dental Composites with Novel Bis-GMA Derivate as a Resin Base
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Effect of Filler Ratio on Properties of Nanohydroxyapatite/SiO2 Based Bioactive Dental Resin Composites

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Abstract:

Hydroxyapatite (HAP), as an essential component of bone and tooth, is one of the promising bioactive materials. The purpose of this study was to investigate the effects of incorporation of nanoHAP and SiO2 particles on the properties of bioactive dental composite. Silanized HAP and SiO2 were mixed with BisGMA/TEGDMA (1/1 wt/wt) monomers at various HAP/SiO2 mass ratios of 0:7 (no HAP), 5.25/1.75, 3.5/3.5, 1.75/5.25, 7:0 (no SiO2) to yield a series of pastes all containing 70 wt% filler loading. The results showed that flexural strength, elastic modulus and compressive strength gradually decreased with increasing amount of HAP particles, as well as curing depth and polymerization shrinkage, which resulted from the nature of HAP particle material. Water sorption and solubility in water increased slightly with addition of HAP particles. Degree of conversion test could support results above well. Remineralization test in SBF demonstrated dental composite with HAP particles had a good apatite-forming ability. Consequently, dental composite filled with lower amount of nanoHAP (HAP/SiO2 around 0.25) particles would possess better comprehensive performances.

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Periodical:

Materials Science Forum (Volumes 745-746)

Pages:

466-472

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.745-746.466

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Online since:

February 2013

Authors:

Feng Wei Liu, Jing Hang Hu, Rui Li Wang, Ying Ying Pan, Xiao Ze Jiang, Mei Fang Zhu

Keywords:

Bioactivity, Dental Composite, Mechanical Property, Nanohydroxyapatite, Silica

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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