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Journal of Biomaterials Applications
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Article

Preparation and Evaluation of Dental Resin Luting Agents with Increasing Content of Bisphenol-A Ethoxylated Dimethacrylate

Rafael R. Moraes1, Mário A.C. Sinhoreti1, Lourenço Correr-Sobrinho1*, Fabrício A. Ogliari2, Evandro Piva2, and Cesar L. Petzhold3

1 Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, P.O. BOX 52, University of Campinas – UNICAMP Av. Limeira, 901 – 13414-903 – Piracicaba, SP – Brazil
2 Department of Restorative Dentistry, School of Dentistry Federal University of Pelotas – UFPel, R. Gonçalves Chaves 457 – 96015-560 – Pelotas, RS – Brazil
3 Department of Organic Chemistry, Institute of Chemistry Federal University of Rio Grande do Sul – UFRGS Av. Bento Gonçalves, 9500 – 91501-970 – Porto Alegre, RS, Brazil

* To whom correspondence should be addressed.


  Abstract

Resin luting agents in which bisphenol-A glycidyl dimethacrylate (Bis-GMA) and/or triethylene glycol dimethacrylate (TEGDMA) are replaced with increasing amounts of bisphenol-A ethoxylated dimethacrylate are prepared. Degree of conversion (DC), diametral tensile strength (DTS), Young's modulus (YM), Knoop hardness (KHN), film thickness (FT), water sorption (Wsp), and solubility are evaluated. Regression analyses investigate the substitution of each monomer. The most appreciable differences are detected when TEGDMA is replaced: decreased DC, DTS, and Wsp, and increased YM, KHN, and FT. For substitution of Bis-GMA, the only significant differences are reduced Wsp and increased YM. An ideal formulation of resin cement would make use of the three monomers.

Key Words: degree of conversion, dimethacrylates, elastic modulus, hardness, mechanical properties, resin cements, water sorption/solubility.

First published on November 25, 2008
Journal of Biomaterials Applications 2008, doi:10.1177/0885328208098594
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