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Related Experiment Videos

Development of calcium phosphate based functional gradient bioceramics

M Kon1, K Ishikawa, Y Miyamoto

  • 1Department of Dental Engineering, School of Dentistry, Tokushima University, Japan.

Biomaterials
|June 1, 1995
PubMed
Summary
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Researchers developed a gradient bioceramic by altering calcium phosphate composition. This functional material exhibits a gradual transition from alpha-tricalcium phosphate (alpha-TCP) on the surface to hydroxyapatite (HA) within, offering tailored tissue integration.

Area of Science:

  • Biomaterials Science
  • Materials Engineering
  • Ceramic Science

Background:

  • Bioceramics are crucial for tissue regeneration and repair.
  • Tailoring bioceramic composition is key to optimizing biological interactions.
  • Gradient materials offer unique advantages for gradual integration with host tissues.

Purpose of the Study:

  • To develop a functional gradient bioceramic with a tunable composition gradient.
  • To investigate the fabrication process and resulting microstructural characteristics.
  • To understand the relationship between processing parameters and the gradient ratio of constituent phases.

Main Methods:

  • A novel method involving diamond powder coating on hydroxyapatite (HA) powder.
  • Two-stage firing process: initial firing under reduced pressure, followed by atmospheric pressure firing.

Related Experiment Videos

  • Characterization of the sintered body's composition and microstructure using depth-dependent analysis.

    • Main Results:

    • A dense, sintered bioceramic body was successfully fabricated.
    • A distinct compositional gradient was achieved, with alpha-tricalcium phosphate (alpha-TCP) on the surface and increasing HA content with depth.
    • The gradient ratio was found to be dependent on firing time and pressure conditions.
    • alpha-TCP formation was attributed to HA decomposition from diamond powder combustion.

    Conclusions:

    • A novel method for creating functional gradient bioceramics was established.
    • The developed bioceramic exhibits a controlled gradient of alpha-TCP and HA, promising for enhanced tissue integration.
    • Processing parameters significantly influence the gradient profile, allowing for material customization.