Open AccessBehavior of Polymerization Shrinkage Stress of Methacrylate-based Composite and Silorane-based Composite during Dental Restoration
Author(s) -
Jung Hoon Park,
Nak–Sam Choi
Publication year - 2015
Publication title -
composites research
Language(s) - English
Resource type - Journals
eISSN - 2288-2111
pISSN - 2288-2103
DOI - 10.7234/composres.2015.28.1.006
Subject(s) - shrinkage , materials science , composite material , composite number , finite element method , stress (linguistics) , methacrylate , polymerization , von mises yield criterion , structural engineering , polymer , engineering , linguistics , philosophy
??? ??? ???? ??? Methacrylate ?? ????(Clearfil AP-X)? Silorane ?? ????(Filtek P90)? ???? FEM . ?? ???? ???? ???? ? ?? FEM ???? ??? ?? ???. ???? ??? ??, ???? Clearfil AP-X? Filtek P90 ?? ? 2.8? ?? ????. FEM ?? ??, Von-Mises ??? ???? ???? PMMA ???? ??? ???? ???? ???? ? ??? ???. ???? ?? ?? ??? FEM ???? ?? ?? ???? ?? 5% ??? .
Polymerization shrinkage stress analysis of dimethacrylate-based composite (Clearfil AP-X, Kuraray) and silorane-based composite (Filtek P90, 3M ESPE) used for dental composite restorations was performed using straingage measurement and FEM analysis. A theoretical equation based on Young’s modulus and polymerization shrinkage of the composite resin was proposed to predict the polymerization shrinkage stress. Experimental results showed that the maximum shrinkage stress of Clearfil AP-X was about 2.8 times higher than Filtek P90. FEM analysis agreed with such experimental stress behaviours and showed that the maximum Von-Mises stress appeared near the margin of the filled resin adhered with PMMA ring. The stress concentration at the interface on the specimen surface was higher than that in the interior. The maximum error of shrinkage stress by the theoretical equation was reasonable within 5% in comparison to FEM results under plane stress.? ??? 2014?? ??()? ???? ??? ?? ??? (No.2012R1A2A2A02010147)