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[Temporary restoration using light-cured resin].

E Chiba, N Tsukamoto, K Sakurai

    Shigaku = Odontology; Journal of Nihon Dental College
    |June 1, 1989
    PubMed
    Summary
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    Light-cured resins offer improved handling and reduced heat compared to traditional chemically cured resins for temporary crowns. While chemically cured resins show slightly higher tensile strength, light-cured options provide comparable hardness and better setting properties.

    Area of Science:

    • Dental Materials Science
    • Polymer Chemistry
    • Biomaterials Engineering

    Background:

    • Chemically cured resins, despite issues like irritability and polymerization shrinkage, have been standard for temporary restorations.
    • Light-cured resins offer an alternative, mitigating the drawbacks of chemically cured materials.

    Purpose of the Study:

    • To evaluate the clinical applicability of light-cured resins for temporary dental crowns.
    • To compare the mechanical properties, handling, and setting characteristics of light-cured and chemically cured resins.

    Main Methods:

    • Mechanical property testing (tensile strength, Vickers hardness) of two light-cured resins (Triad, Unifast LC) and one chemically cured resin (Unifast).
    • Evaluation of handling, setting properties, and crown fabrication methods.

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  • Measurement of heat generation during polymerization.

    • Main Results:

    • No significant difference in tensile strength between Triad and Unifast LC; Unifast showed significantly higher tensile strength.
    • Vickers hardness was comparable across all three resin types.
    • Setting times for Unifast LC were longer than Unifast, particularly in the tray method.
    • Chemically cured Unifast generated significantly higher exothermic temperatures than light-cured resins.

    Conclusions:

    • Light-cured resins demonstrate promising clinical potential for temporary crowns, offering reduced heat generation and improved setting characteristics.
    • While chemically cured resins exhibit higher tensile strength, light-cured alternatives provide a viable option with fewer handling drawbacks.