Polymerization contraction and conversion of light-curing BisGMA-based methacrylate resins.
The aim of this study was to investigate the polymerization contraction and the conversion of light-curing methacrylate resins based on bisphenol-A bis(2-hydroxypropyl)methacrylate (BisGMA) diluted with triethylene glycol dimethyacrylate (TEGDMA), methyl methacrylate (MMA), hydroxypropyl methacrylate (HPMA) or (+/-)-2-ethylhexyl methacrylate (EHMA). The contraction measurements were carried out with a linometer, a simple device to determine true linear polymerization contraction of liquid monomers at ambient temperature. The contraction increased with the amount of diluting monomer. The estimated conversion of the BisGMA-TEGDMA, calculated using the contraction, is consistent with literature values. The BisGMA-HPMA mixtures showed high conversions at moderate contraction.
Venhoven
B A
BA
Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam, (ACTA), The Netherlands.
de Gee
A J
AJ
Davidson
C L
CL
D003188:Composite Resins / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D011108:Polymers; D013696:Temperature
D003188:Composite Resins; D008689:Methacrylates; D011108:Polymers