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  • 1990-1994  (4)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Optical and thermal properties in experimental Bis-GMA-based resins influenced by filler characteristics (1990)
    Springer
    Journal of materials science 1 (1990), S. 55-59 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract The optical and thermal properties were examined in experimental 2,2-Bis-[4-(3-methacryloxy-2-hydroxypropoxy)phenel]propane (Bis-GMA)-based composite resin systems, each of which contained silica, silica-alumina and alumina filler particles. The filler particles were surface-treated by 1% γ-methacryloxypropyl trimethoxy silane and directly dispersed into the visible-light-cured Bis-GMA-based resin matrix. The average particle size was from 0.012 to 70 µm (silica filler), 2.4 to 8.4 µm (silica-alumina) and 0.02 µm (alumina). The analyses indicated that the filler-containing resin had a larger value of light transmittance when the difference in refractive index between comonomer and filler was smaller. In selected properties such as light transmittance, refractive index and depth of cure, the transmittance and the refractive index difference were important in the increased depth of cure in the Bis-GMA-based resins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705355
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Application of multifunctional base monomer to dental composite resins (1990)
    Springer
    Journal of materials science 1 (1990), S. 163-170 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Experimental composite resin systems were prepared with visible-light-cured multifunctional matrices to which various amounts of organic composite filler were added. In comparison with the unfilled resins, the filled resin systems were tested for Knoop hardness, compressive and diametral tensile tests, thermal properties, and water sorption. Analyses of the results obtained for the unfilled resins indicate that the increased hardness and mechanical strength were dependent on the multifunctional base monomer. The effective composite resin system was the one that was filled with organic composite filler in the multifunctional comonomer having triethylene glycol dimethacrylate as a diluent monomer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00700877
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Mechanical strength of urethane-based visible-light-cured resins (1993)
    Springer
    Journal of materials science 4 (1993), S. 404-406 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: In experimental urethane-based visible-light-cured(VLC) resins containing a diluent monomer, a lower value of activation energy for polymerization than in bis-GMA-based VLC resin was obtained. A greater increased diametral tensile strength and slightly larger compression strength were observed. The diluent monomer in the urethane-based VLC resins gives an increase of strength, associated with lower activation energy for polymerization, compared with the bis-GMA-based resin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00122199
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Cure performance of multifunctional monomers to photo-initiators: a thermoanalytical study onbis-GMA-based resins (1991)
    Springer
    Journal of materials science 26 (1991), S. 3185-3190 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In order to assess cure performance in experimental monomer systems containingbis-GMA and 3G, differential scanning calorimetry was used to obtain heat for curing, and residual monomers present within the resin systems were measured by high-performance liquid chromatography. Visible light-activated polymerization of these monomer systems was studied using camphorquinone (CQ) and reducing agents of dimethylaminoethyl methacrylate (DMAEMA) and dimethyl-para-toluidine (DMPT). For unfilledbis-GMA-based resin (60 wt%bis-GMA and 40 wt% 3 G) containing CQ (0.5 wt%) and DMAEMA (0.5 wt%) indicating approximately 100% polymerization, less residual monomer and larger hardness than the other monomer systems were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01124661
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    Paper (German National Licenses)
    Fulltext
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