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Related Experiment Videos

Retrieval studies on calcium phosphate-coated implants

W J Dhert1

  • 1Department of Orthopaedic Surgery, University Hospital, Universiteit Utrecht, The Netherlands.

Medical Progress Through Technology
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

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Calcium phosphate coatings, particularly hydroxylapatite, enhance bone implant fixation. Clinical studies show their effectiveness in total joint prostheses, though optimal coating stability and interface strength require further investigation.

Area of Science:

  • Biomaterials Science
  • Orthopaedic Surgery
  • Biomedical Engineering

Background:

  • Calcium phosphate coatings, especially hydroxylapatite, are used to improve bone implant fixation in orthopaedic and dental applications.
  • Numerous animal studies and emerging clinical data support the efficacy of these coatings.

Purpose of the Study:

  • To review the plasma-spray process for calcium phosphate coatings.
  • To discuss analytical techniques for retrieved implants.
  • To examine the clinical success and remaining questions regarding hydroxylapatite coatings.

Main Methods:

  • Review of plasma-spray coating techniques.
  • Discussion of analytical methods for retrieved implants.
  • Synthesis of findings from animal and clinical studies.

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Main Results:

  • Calcium phosphate hydroxylapatite is osteoconductive, enhancing implant fixation.
  • Coatings improve fixation under suboptimal conditions like porous implants or micromotion.
  • Clinical studies confirm efficacy, leading to widespread use of hydroxylapatite coated prostheses.

Conclusions:

  • Hydroxylapatite coated implants are clinically successful and widely used.
  • Key questions remain regarding the strength of the coating-substrate interface.
  • Optimal stability and crystallinity of hydroxylapatite coatings for clinical function are still under investigation.