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Hydroxyapatite coatings.

J E Lemons1

  • 1Department of Biomaterials, University of Alabama, Birmingham 35294.

Clinical Orthopaedics and Related Research
|October 1, 1988
PubMed
Summary
This summary is machine-generated.

Hydroxyapatite compounds show promise for orthopedic surgery due to their bone bonding and biocompatibility. Research is ongoing to improve their strength for enhanced in vivo applications.

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Area of Science:

  • Biomaterials Science
  • Orthopedic Surgery
  • Materials Chemistry

Background:

  • Hydroxyapatite compounds are of significant interest for orthopedic applications due to their elemental composition (calcium and phosphate).
  • Their controllable crystalline and physical structures allow for diverse in vivo interactions, biocompatibility, and bone bonding capabilities.
  • Existing literature supports their use as surface coatings to enhance mechanical force transfer in orthopedic implants.

Purpose of the Study:

  • To explore the potential of hydroxyapatite compounds in orthopedic surgical applications.
  • To review the properties and limitations of calcium phosphate-based ceramics.
  • To highlight ongoing research for improving the mechanical properties of these materials.

Main Methods:

Related Experiment Videos

  • Synthesis of hydroxyapatite ceramics through reactions of calcium oxide and phosphorous pentoxide.
  • Variation of crystallographic forms, microstructures, and densities to achieve desired properties.
  • Review of existing literature on biocompatibility, in vivo interactions, and mechanical properties.

    • Main Results:

    • Hydroxyapatite ceramics can be synthesized in multiple crystallographic forms with adjustable microstructures and densities, ranging from stable to biodegradable.
    • These materials offer opportunities for surface coating and enhancing bone bonding and mechanical force transfer.
    • A key limitation identified is the relatively low shear and fatigue strengths of current calcium phosphate-based ceramics.

    Conclusions:

    • Hydroxyapatite compounds possess favorable characteristics for orthopedic applications, including biocompatibility and bone integration.
    • Ongoing research focuses on overcoming limitations such as low mechanical strength through novel compositions, coatings, and composites.
    • Clinical trials are underway for hydroxyapatite coatings, indicating progress towards broader orthopedic use.