English summary
The composition, leachable products, and physical properties of toothcoloured restorative materials have been determined. The composition was often found to be more complex than described in the MSDS of the materials. The most frequently used monomers such as TEGDMA, Bis-GMA, Bis-EMA, UDMA, and 2-HEMA were detected, as well as several other monomers and different additives (initiators, activators, and stabilizers). The initiator camphoroquinone was found in all the investigated materials. Both monomers and additives leached out of the materials in an aqueous solution in vitro, and the amounts were quantified for the most frequent monomers. Both large (ex. Bis-GMA, UDMA, TEGDMA) and smaller monomers (ex. 2-HEMA, GMA) leached out of the materials. The flexural strengths of composites and compomers were comparable. The lowest flexural strengths values were found for the resin-based glass ionomers. The hardness of the composites and compomers was slightly higher than that observed for the glass ionomers, with the exception of a flowable composite. The different restorative materials could not be distinguished in types based on abrasive resistance upon brushing. The abrasion resistance was inversely related to the amount of residual monomer in the composites.
Referanse
Polymerbaserte tannfyllingsmaterialer – en undersøkelse av viktige egenskaper.
Kopperud HM.
Nor Tannlegeforen Tidende 2007;117:954–60.