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Novel hydroxyapatite-based dental composites

R Labella1, M Braden, S Deb

  • 1Joint Department of Biomaterials Science, Eastman and London Hospital Dental Institutes, UK.

Biomaterials
|December 1, 1994
PubMed
Summary
This summary is machine-generated.

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Newly developed dental composite resins show improved mechanical properties. Using silanized hydroxyapatite filler significantly enhances flexural strength, tensile strength, and hardness in these advanced dental materials.

Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Dental Materials Science

Background:

  • Composite resins are widely used in dental restorations.
  • Optimizing the mechanical properties of dental composites is crucial for longevity and performance.
  • Hydroxyapatite is a promising filler material for dental composites due to its biocompatibility.

Purpose of the Study:

  • To investigate the mechanical properties of novel composite resins for dental applications.
  • To evaluate the effect of silanized hydroxyapatite filler on composite resin performance.
  • To compare the properties of composites with different filler loadings.

Main Methods:

  • Composite resins were formulated using bis-4(2-hydroxy-3-methacryloyloxypropoxy)phenyl propane and urethane dimethacrylate matrix with tetrahydrofurfuryl methacrylate diluent.

Related Experiment Videos

  • Heat-cured resins were prepared with filler weight fractions of 60% and 67%.
  • Hydroxyapatite powder was surface-treated with a silane coupling agent and incorporated at 60%, 67%, and 80% filler content.

    • Main Results:

    • All tested mechanical properties, including Young's modulus, flexural strength, diametral tensile strength, and Vickers hardness, were evaluated.
    • The use of silanized hydroxyapatite filler significantly improved flexural strength, diametral tensile strength, and Vickers hardness compared to untreated fillers.
    • Young's modulus showed no significant improvement with the silanized filler.

    Conclusions:

    • Surface treatment of hydroxyapatite filler with a silane coupling agent enhances the mechanical properties of dental composite resins.
    • Silanized hydroxyapatite is a superior filler for improving the strength and hardness of these composite materials.
    • The findings suggest potential for improved dental restorative materials using optimized filler treatments.