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Bioactive bone cements

E J Harper1

  • 1Interdisciplinary Research Centre in Biomedical Materials, Queen Mary and Westfield College, University of London.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|June 5, 1998
PubMed
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Poly(methylmethacrylate) (PMMA) bone cement failure can be addressed by developing bioactive bone cement. Research explores improving PMMA or creating alternative matrices to enhance implant longevity and bone integration.

Area of Science:

  • Biomaterials Science
  • Orthopedic Surgery
  • Polymer Chemistry

Background:

  • Poly(methylmethacrylate) (PMMA) bone cement is widely used for implant fixation but can fail due to mechanical limitations and adverse bone interactions.
  • Cement mantle breakdown is a significant factor in prosthetic loosening and implant failure.
  • Current PMMA cements have limitations in mechanical properties like fatigue, creep, and fracture toughness, impacting long-term implant survival.

Purpose of the Study:

  • To review and discuss the development of bioactive bone cements as an alternative to traditional PMMA.
  • To highlight the necessity of improved mechanical properties alongside bioactivity for enhanced implant fixation and longevity.
  • To analyze different approaches in creating bioactive bone cements, including modifications to PMMA and alternative matrix designs.

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Main Methods:

  • Review of existing literature on bioactive bone cement development.
  • Analysis of strategies for incorporating bioactive agents into PMMA.
  • Evaluation of alternative matrix materials for bioactive bone cement formulations.
  • Discussion of the relative benefits and drawbacks of various investigated approaches.

Main Results:

  • Two primary strategies for developing bioactive bone cement have been identified: modifying existing PMMA and designing novel matrices.
  • Improvements in mechanical properties, particularly fatigue, creep, and fracture toughness, are crucial for extending the lifespan of cemented implants.
  • Bioactive bone cements aim to create a superior interface between the cement and bone, potentially improving fixation and reducing failure rates.

Conclusions:

  • Bioactive bone cements offer a promising avenue for improving the long-term success of cemented orthopedic implants.
  • Further research is needed to optimize both the bioactivity and mechanical integrity of new bone cement formulations.
  • Addressing the limitations of current PMMA cements through bioactivity and enhanced mechanical performance is essential for reducing implant loosening and revision surgeries.