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Preparation of a novel anti shrinking agent (SOC DA) and its evaluation in dental resins

  • Ricardo Acosta Ortiz (a1), Luis Alberto Reyna Medina (a1), María Lydia Berlanga Duarte (a1) and Aida Esmeralda Garcia Valdez (a1)

Abstract

In this work is discussed the synthesis of a novel antishrinking agent (SOC DA) and the evaluation of its performance in an acrylic dental resin. SOC DA was photopolymerized in conjunction with the components of a conventional acrylic resin, which includes a mixture of diacrylate monomers [glycerolate bisphenol A dimethacrylate (BIS-GMA) / Urethane dimethacrylate (UDMA) / triethyleneglycol dimethacrylate (TEGDMA)] in 50/30/20 molar ratio). SOC DA was added in a range between 5.0-20.0 mol % with respect to the total amount of moles of the acrylic monomers. It was found that increasing concentrations of SOC DA, promoted higher conversions of the dimethacrylate monomers without decreasing the photopolymerization rate of the acrylate monomers. The study of the effect of SOC DA on the mechanical properties of the dental composite filled with 70 % of silicon dioxide, revealed that the presence of the antishrinking agent improved both the compressive and the flexural strength of the dental materials. Besides, it was found that by using the SOC DA at 20%, the shrinkage was reduced 52%, compared with the same formulation without SOC DA.

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4. Acosta Ortiz, R., Berlanga Duarte, M.L., Savage Gomez, A.G., Sangermano, M, Garcia Valdez, A.e.; Polymer International, 59, 680685 (2010)
5. Acosta Ortiz, R., Reyna Medina, L.A., Berlanga Duarte, M.L., Ibarra Samaniego, L., Garcia Valdez, A.E., J. Mater. Sci: Mater med, DOI 10.1007/s10856-013-4959-5
6. Acosta Ortiz, R., Berlanga Duarte, M.L., Savage Gomez, A.G., Sangermano, M.; Polymer International, 61, 587595 (2012)

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