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Application of diol dimethacrylates in dental composites and their influence on polymerization shrinkage

✍ Scribed by Dariusz Bogdal; Jan Pielichowski; Adam Boron

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 133 KB
Volume: 66
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19971219)66:12<2333::aid-app14>3.0.co;2-0

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✦ Synopsis

Diol dimethacrylates (DD) that possess long aliphatic chains were incorporated into the conventional dental resin mixtures (e.g., BIS-GMA and TEGDMA) in order to reduce the polymerization stress and shrinkage of final copolymers. It was found that the polymerization shrinkage of the standard copolymer (60 mol % BIS-GMA and 40 mol % TEGDMA) could be reduced even by 20% when TEGDMA is substituted by a long aliphatic diol dimethacrylate. These phenomena can be attributed to the low miscibility of BIS-GMA and DD, which causes long aliphatic chains of DD to remain in coil form in a reaction mixture. The coils can be unwound and expand as a result of the formation of covalent bonds during polymerization and thus reduce the polymerization shrinkage.

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