Preparation and evaluation of dental resin luting agents with increasing content of bisphenol-A ethoxylated dimethacrylate.
Resin luting agents in which bisphenol-A glycidyl dimethacrylate (Bis-GMA) and/or triethylene glycol dimethacrylate (TEGDMA) are replaced with increasing amounts of bisphenol-A ethoxylated dimethacrylate are prepared. Degree of conversion (DC), diametral tensile strength (DTS), Young's modulus (YM), Knoop hardness (KHN), film thickness (FT), water sorption (W(sp) ), and solubility are evaluated. Regression analyses investigate the substitution of each monomer. The most appreciable differences are detected when TEGDMA is replaced: decreased DC, DTS, and W(sp), and increased YM, KHN, and FT. For substitution of Bis-GMA, the only significant differences are reduced W(sp) and increased YM. An ideal formulation of resin cement would make use of the three monomers.
Moraes
Rafael R
RR
Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, P.O. BOX 52, University of Campinas-UNICAMP Av. Limeira 901-13414-903-Piracicaba, SP-Brazil.
Sinhoreti
Mário A C
MA
Correr-Sobrinho
Lourenço
L
Ogliari
Fabrício A
FA
Piva
Evandro
E
Petzhold
Cesar L
CL
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003793:Dental Restoration, Permanent; D055119:Elastic Modulus; D006244:Hardness; D066298:In Vitro Techniques; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D015394:Molecular Structure; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000138:chemical synthesis* / Q000737:chemistry*; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013718:Tensile Strength; D014867:Water
D008689:Methacrylates; D011109:Polymethacrylic Acids; D019279:Resin Cements; D014867:Water; C020946:triethylene glycol dimethacrylate; C041979:2,2-bis-(4-(2-methacryloxyethoxy)phenyl)propane; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate