Influence of Silane Coupling Agent and Nano-Filler on the Properties of Dental Resin Composite Cements

Abstract:

Dental resin composite cements were prepared with simply mixing method of Part A and Part B. The material components in Part A were composed of Bis-GMA, TEDGMA, 4-META, SiO₂ nanopowders and BPO. The components in Part B were Bis-GMA, TEDGMA, 4-META, SiO₂ nanopowders and 2,2¢-(4-methylphenylimino) diethanol. Before using SiO₂ nano-filler in the formulation of Part A and Part B, it had to be coated with methacryloxypropyltrimethoxysilane (MPS) which served as a silane coupling agent. Therefore, the optimum amount of MPS (1, 1.2, 1.5 and 2%) and SiO₂ nano-filler (20, 27.27 and 33.33 wt%) used to fabricate the composites were investigated. The homogeneous mixture of Part A and Part B at mass fraction of 1:1 was formed into the bar shape with dimension of 25 mm x 2.0 mm x 2.0 mm and then cured under light source for 20 s. Then flexural strength was measured using the universal testing machine. Depth of cure was tested using mould which was perforated in cylindrical shape of 6 mm in depth and of 4 mm in diameter. The result showed that composite with 27.27 wt% of salinized SiO₂ nanopowders by 1.5% of MPS showed the highest flexural strength of 65 MPa and depth of cure of more than 5 mm which were accepted according to ISO 4049. This study could be concluded that using a proper amount of MPS to silanize SiO₂ nanopowders and using an optimum amount of SiO₂ nanopowders significantly improved the flexural strength of dental resin composite cements.

• Periodical: Key Engineering Materials (Volume 690)
• Pages: 230-235
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.690.230
• Online since: May 2016
• Authors: Wasana Khongwong*, Kanungnuch Keawsupsak, Saengdoen Daungdaw, Pornpen Siridamrong, Arjin Boonruang
• Keywords: Dental Cement, Nano-Filler, Resin Composite Cement, Silane Coupling Agent

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