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Water sorption and dynamic mechanical properties of dentin adhesives with a urethane-based multifunctional methacrylate monomer
Park, Jonggu Ye, Qiang Topp, Elizabeth M. Misra, Anil Spencer, Paulette
Park, Jonggu
Ye, Qiang
Topp, Elizabeth M.
Misra, Anil
Spencer, Paulette
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Abstract
Objectives
Our previous study showed the synthesis and characterization of a novel urethane-linked trimethacrylate monomer for use as a co-monomer in dentin adhesives. The objective of this work was to further investigate the performance of dentin adhesives containing a new monomer, with particular emphasis on the water sorption and visco-elastic behavior of the crosslinked networks.
Materials and methods
Dentin adhesives contained 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy) phenyl]-propane (BisGMA), 2-hydroxyethyl methacrylate (HEMA), and a new multifunctional methacrylate with urethane-linked groups-1,1,1-tri-[4-(methacryloxyethylaminocarbonyloxy)-phenyl]ethane (MPE) and were photo-polymerized in the presence or absence of water. Adhesives were characterized with regard to degree of conversion (DC), viscosity, water sorption/solubility, and via dynamic mechanical analysis (DMA) and compared with BisGMA/HEMA controls.
Results
The experimental adhesives exhibited DC and solubility comparable to that of the control, regardless of the presence or absence of water. All the experimental adhesives tested showed less water sorption, lower tan δ peak heights, and higher rubbery modulus than the control.
Significance
Dentin adhesives containing a new multifunctional methacrylate showed better dynamic thermomechanical properties and water sorption relative to controls, without compromising DC and solubility. Thus, MPE, when included as a component of methacrylate dentin adhesives, may provide enhanced durability in the moist environment of the mouth.
Description
Date
2010-12-01
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Elsevier
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spencer_water.pdf
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Keywords
Dentin adhesives, Water sorption, Dynamic mechanical property, Multifunctional methacrylate, Storage modulus, Crosslink density, Tan delta, Degree of conversion
Citation
Park, Jong-Gu, Qiang Ye, Elizabeth M. Topp, Anil Misra, and Paulette Spencer. "Water Sorption and Dynamic Mechanical Properties of Dentin Adhesives with a Urethane-based Multifunctional Methacrylate Monomer." Dental Materials 25.12 (2009): 1569-575.