Yiming Weng, Xia Guo, Voon Joe Chong, Leah Howard, Richard L. Gregory, Dong Xie

Abstract: The novel quaternary ammonium bromide (QAB)-containing oligomers were synthesized and applied for developing an antibacterial resin composite. Compressive strength (CS) and S. mutans (an oral bacteria strain) viability were used to evaluate the mechanical strength and antibacterial activity of the formed composites. All the QAB-modified resin composites showed significant antibacterial activity and mechanical strength reduction. Increasing chain length and loading significantly enhanced the antibacterial activity but dramatically reduced the CS as well. The 30-day aging study showed that the incorporation of the QAB accelerated the degradation of the composite, suggesting that the QAB may not be well suitable for development of antibacterial dental resin composites or at least the QAB loading should be well controlled, unlike its use in dental glass-ionomer cements. The work in this study is beneficial and valuable to those who are interested in studying antibacterial dental resin composites.

Keywords: QAB; substitute chain length; antibacterial; S. mutans viability; CS; dental resin composites

Cite this paper: nullWeng, Y. , Guo, X. , Chong, V. , Howard, L. , Gregory, R. and Xie, D. (2011) Synthesis and evaluation of a novel antibacterial dental resin composite with quaternary ammonium salts. Journal of Biomedical Science and Engineering, 4, 147-157. doi: 10.4236/jbise.2011.43021.

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