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  • 1
    Electronic Resource
    Electronic Resource
    Modelling the effects of enamel anisotrophy with the finite element method (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 22 (1995), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: SUMMARY The finite element method was used to model an in vitro tooth loading system. The dentine was modelled as a linear elastic and isotropic material, while the enamel was modelled as an anisotropic material to take account of the biological variation in prism angulation. The elastic modulus values of enamel and dentine used in this analysis were altered in order to replicate the movement of the in vitro system. It was found that a dentine modulus of 15 GPa and an enamel modulus of 80 GPa in the principal prism direction gave the best replication of cuspal movement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1995.tb00800.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of interfacial failure around a class V composite restoration analysed by the finite element method (2000)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 27 (2000), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Partial failure around the tooth–composite interface of a class V restoration is common due to the effects of polymerization shrinkage. The effect that this has on the force distribution of the remaining intact interfaces has not been investigated. The aim of this study was to quantify the effect that partial failure of an isolated cavity wall interface had on the force distribution around the remaining intact interfaces of a class V composite restoration in a lower first premolar using a two-dimensional plane strain finite element model. Partial failure resulted in a 4–6-fold increase in peak tensile and shear forces compared to a tooth with a fully intact cavity wall interface. In some instances, the peak stresses were greater than the known bond strengths of composite to dentine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2000.00493.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of curing light intensity and test temperature on the dynamic mechanical properties of two polymer composites (1999)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 26 (1999), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The dynamic modulus of elasticity of two composite materials cured by three light intensities was investigated using a dynamic thermal and mechanical analyser at 37 °C and 60 °C. The lowest light intensity, 180 mW/cm2, was found to be unsatisfactory in that specimens were weak and mostly untestable. The higher intensities, 350 and 700 mW/cm2, cured the materials to slightly different extents with the elevated temperatures of testing leading to post-cure maturation of the materials. An interesting finding was that one material had a significantly higher modulus when tested at 37 °C in comparison with that found at 60 °C. In one material the higher light intensity resulted in significantly higher modulus values and these values were increased by post-curing. In the other material the higher light intensity did not result in higher modulus figures at either test temperature, and lower test temperature resulted in better post-cure maturation. These findings are most likely to be caused by differences in base monomer and activator/initiator concentrations. The results indicate that optimum polymerization may not be achieved in all materials by the same method, in particular, high curing light intensities may not achieve the most desirable results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.1999.00432.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Improvement in the method for the impregnation of gypsum casts (1978)
    Springer
    Journal of materials science 13 (1978), S. 1145-1146 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00544717
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Viscoelastic properties of a room-temperature curing dimethacrylate resin (1985)
    Springer
    Journal of materials science 20 (1985), S. 929-934 
    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 The viscoelastic properties of a thermosetting resin prepared from bis-phenol A and diglycidal methacrylate were examined using three dynamic test methods. A strong dependence on frequency and temperature was observed, and the nature of this dependence, together with comparative data obtained for an epoxy resin, enabled some predictions on structural mechanisms to be made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585736
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The evaluation of non-Newtonian viscosity using a modified parallel-plate plastometer (1979)
    Springer
    Journal of materials science 14 (1979), S. 307-311 
    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 A modified parallel-plate plastometer has been developed to measure the viscosity of rapid setting dental composite pastes. The theoretical treatment presented enabled the shear rates occurring in the specimen to be determined and, therefore, different materials to be compared. Five pastes were shown to be pseudoplastic power-law fluids each with uniqueK andn values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00589820
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Co-polymer impregnation of gypsum casts (1979)
    Springer
    Journal of materials science 14 (1979), S. 2274-2276 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688439
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    Paper (German National Licenses)
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