Dental restorative composites containing 2,2-bis-[4-(2-hydroxy-3-methacryloyloxy propoxy) phenyl] propane derivatives and spiro orthocarbonates.
Various dental restorative composite resins containing 2,2-bis-[4-(2-hydroxy-3-methacryloyloxy propoxy) phenyl] propane (Bis-GMA) derivatives and spiro orthocarbonates (SOCs) were explored for minimizing the volumetric shrinkage that generally occurs during polymerization. Previous reports suggested mixing Bis-GMA with its derivative TMBis-GMA (2,2-bis[3,5-dimethyl-4-(2-hydroxy-3-methacryloyloxy propoxy) phenyl] propane) to obtain a dental composite with low volumetric shrinkage. It was hypothesized that spiro orthocarbonates would expand volumetrically during polymerization, because of their sophisticated ring-opening reactions; therefore several of them were added to the mixture of Bis-GMA and TMBis-GMA to bring about further reductions in volumetric shrinkage. It was indeed possible to reduce the extent of volumetric shrinkage of dental composites containing SOCs, and to do so without compromising these resins' mechanical properties.
Moon
E J
EJ
School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Huksuk-dong, Dongjak-gu, Seoul, 156-756, Korea.
Lee
J Y
JY
Kim
C K
CK
Cho
B H
BH
D001672:Biocompatible Materials / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000138:chemical synthesis / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008422:Materials Testing; D008958:Models, Molecular; D008968:Molecular Conformation; D013329:Structure-Activity Relationship
D001672:Biocompatible Materials; D003188:Composite Resins; D017438:Bisphenol A-Glycidyl Methacrylate