Effect of Chemical Structure and Composition of the Resin Phase on Vinyl Conversion of Amorphous Calcium Phosphate-filled Composites.

Polymer International
D Skrtic, J M Antonucci

Abstract

The objective of this study was to elucidate the effect of chemical structure and composition of the polymer matrix on the degree of vinyl conversion (DC) of copolymers (unfilled resins) and their amorphous calcium phosphate (ACP) composites attained upon photo-polymerization. The DC can also be an indicator of the relative potential of these polymeric materials to leach out into the oral environment un-reacted monomers that could adversely affect their biocompatibility. The following resins were examined: 1) 2,2-bis[p-(2'-hydroxy-3'-methacryloxypropoxy)phenyl]propane (Bis-GMA)/triethylene glycol dimethacrylate (TEGDMA) (1:1 mass ratio; BT resin) combined with hydroxyethyl methacrylate (HEMA; BTH resin) and with HEMA and zirconyl dimethacrylate (BTHZ resin), 2) urethane dimethacrylate (UDMA)/HEMA resins, and 3) pyromellitic glycerol dimethacrylate (PMGDMA)/TEGDMA (PT resin). To make composite specimens, resins were mixed with a mass fraction of 40 % zirconia-hybridized ACP. Copolymers and their composites were evaluated by near infra-red spectroscopy for DC after 1 d and 28 d post-cure at 23 °C. Inclusion of HEMA into the BT and UDMA resins yielded copolymers and composites with the highest DCs. The significantly lower DCs of P...Continue Reading

References

Oct 23, 1965·Nature·E D EanesA S Posner
May 30, 1998·Journal of Dentistry·C L Davidson, A J Feilzer
Jul 18, 2000·Journal of Biomedical Materials Research·D SkrticG E Schumacher
Dec 22, 2000·Dental Materials : Official Publication of the Academy of Dental Materials·J W Stansbury, S H Dickens
Jan 5, 2002·Journal of Biomedical Materials Research·D SkrticR T Brunworth
Feb 1, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·Jack L Ferracane
Jan 1, 2003·Journal of Research of the National Institute of Standards and Technology·D SkrticE D Eanes

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Citations

Sep 22, 2009·Journal of Materials Science. Materials in Medicine·J I JohnsD Skrtic
Mar 8, 2013·Journal of Materials Science. Materials in Medicine·Sergey V Dorozhkin
Oct 25, 2008·Arquivos de neuro-psiquiatria·Rubens ReimãoPéricles Maranhão-Filho
Nov 2, 2018·Dental Materials Journal·Abdul Samad Khan, Mariam Raza Syed
Feb 26, 2021·Biomaterial Investigations in Dentistry·Madalena Belmar da CostaAna Mano Azul
Aug 25, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Roberto Ruggiero Braga

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