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

Published online by Cambridge University Press:  02 January 2014

Ricardo Acosta Ortiz*
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140 Saltillo Coahuila; México 25294. Tel 52 844 4389844
Luis Alberto Reyna Medina*
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140 Saltillo Coahuila; México 25294. Tel 52 844 4389844
María Lydia Berlanga Duarte
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140 Saltillo Coahuila; México 25294. Tel 52 844 4389844
Aida Esmeralda Garcia Valdez
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140 Saltillo Coahuila; México 25294. Tel 52 844 4389844
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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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Articles
Copyright
Copyright © Materials Research Society 2013 

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