SYNTHESIS AND CHARACTERIZATION OF A MONOFUNCTIONAL ANALOG TO BIS-GMA - A DENTAL MONOMER

A new monofunctional BIS-GMA monomer, 4-(2-phenyl isopropyl)-3-phenoxy -2-hydroxy propyl methacrylate (monofunctional-BIS-GMA, hereafter abbr eviated as MF-BIS-GMA) was synthesized as an adduct of 4-cumylphenol a nd glycidyl methacrylate for use as a dental monomer. The new monomer was characterized by FTIR, H-1, C-13 (attached proton test, APT), UV, HPLC, and GPC. The viscosity and solubility of the new resin are also presented. The results were compared with the difunctional analog, BIS -GMA -bis[4-(2-hydroxy-3-methacryloyloxypropoxy)]phenyl propane), whic h is commercially available and currently used in dental restorative m aterials. Both monomers were light-cured using 0.3% camphorquinone and 0.75% 2-(dimethylamino)ethyl methacrylate as photoinitiators. The ext ent of monomer conversion and the potential for residual monomer leach ability were compared between the two cured resins. The monofunctional resin was found to yield higher monomer conversion values (74 vs. 39% ) and lower leachable components (0.03 vs. 30.6 mol %) than those of t he difunctional analog. (C) 1995 John Wiley & Sons, Inc.