2009 Volume 28 Issue 6 Pages 402-410
Novel monomers with relatively low viscosity were synthesized and the basic investigation was performed to accurately determine their usefulness as a base monomer for composite resin or adhesive cement in dentistry. As monomers with one or two central methyl groups of Bis-GMA skeleton replaced by hydrogen, which seemingly reduced the rigidity of whole molecule, 1,1-bis[4-(2-hydroxy-3-methacryloyloxy-propoxy)-phenyl]ethane (monomer I) and bis-[4-(2-hydroxy-3-methacryloyloxy-propoxy)-phenyl]-methane (monomer II) were synthesized. The viscosities of the monomers were measured, then mechanical properties of the polymers obtained from light-curing the monomers were investigated. The following conclusions were drawn. 1) The viscosities of monomers I and II were significantly smaller than that of Bis-GMA. 2) Monomers I and II can be easily polymerized using standard light-induced initiators. 3) The polymer obtained from monomer I has almost the same strength as that obtained from Bis-GMA and TEGDMA monomer mixture. Based on the above findings, monomer I seemed to hold great promise for use as the base monomer of dental composite resin or dental adhesive cements.
