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Related Experiment Videos

Surface studies on acrylic bone cement.

A Bettencourt1, A Calado, J Amaral

  • 1Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, Lisbon 1649-003, Portugal. asimao@ff.ul.pt

International Journal of Pharmaceutics
|May 26, 2004
PubMed
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Aging of poly(methyl methacrylate) (PMMA) bone cement in simulated body fluid alters surface properties. These surface changes may influence host response and contribute to implant loosening in cemented arthroplasties.

Area of Science:

  • Biomaterials Science
  • Orthopedic Surgery
  • Surface Chemistry

Background:

  • Poly(methyl methacrylate) (PMMA) bone cement is crucial for cemented arthroplasties, filling the space between prosthesis and bone.
  • Biocompatibility issues with bone cement limit the clinical success of cemented arthroplasties.
  • Surface properties like composition and energy are critical due to the cement's direct contact with bone.

Purpose of the Study:

  • To investigate the correlation between aging time and surface changes in PMMA bone cement.
  • To assess how aging affects the surface composition and wettability of PMMA.
  • To understand the potential impact of these surface modifications on biomaterial performance and host response.

Main Methods:

  • X-ray photoelectron spectroscopy (XPS) analysis was performed over 4 months.

Related Experiment Videos

  • Surface energy studies were conducted concurrently with XPS analysis.
  • PMMA samples were aged in a biological model fluid to simulate physiological conditions.

    • Main Results:

    • Aging of PMMA in a biological model fluid significantly altered its surface composition and wettability.
    • Observed changes are attributed to the hydrolysis of PMMA ester groups and subsequent hydrogen bonding.
    • Surface property alterations suggest a potential modulation of the host response to the implant.

    Conclusions:

    • Surface composition and wettability of PMMA bone cement change over time due to aging in simulated physiological environments.
    • These surface modifications may influence the biological response at the bone-cement interface.
    • Understanding these aging-related surface changes is crucial for improving the long-term success of cemented arthroplasties and reducing implant loosening.