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Related Experiment Videos

Factors affecting surgical alloy/bone cement interface adhesion

J C Keller, E P Lautenschlager, G W Marshall

    Journal of Biomedical Materials Research
    |September 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

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    Creating acrylic bone cement (ABC) and surgical alloy interfaces early in the cement setting stage, particularly using electropolishing, enhances bond strength for orthopaedic implants. This improves cementation parameters for better surgical outcomes.

    Area of Science:

    • Biomaterials Science
    • Orthopaedic Surgery
    • Materials Engineering

    Background:

    • Acrylic bone cement (ABC) is crucial for orthopaedic implant fixation.
    • Understanding metal-cement interfaces is vital for long-term implant stability.
    • Common surgical alloys include 316L stainless steel, cobalt-chromium-molybdenum, and titanium alloys.

    Purpose of the Study:

    • To define optimal cementation parameters for acrylic bone cement used with surgical alloys.
    • To evaluate the effect of metal surface preparation and setting time on metal-cement interface strength.
    • To investigate the influence of prepassivation and polishing techniques on bond strength.

    Main Methods:

    • Interfaces were created between acrylic bone cement and 316L SS, Co-Cr-Mo, and Ti-6A1-4V alloys.

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  • Metal surfaces were prepared using mechanical or electropolishing with prepassivation.
  • Interfaces were formed at different stages of the cement setting cycle and cured for various durations.
  • Tensile bond strengths and cement coverage were measured.

    • Main Results:

    • Interfaces formed prior to or at the onset of the dough stage exhibited superior bond strengths compared to those formed later.
    • Electropolishing combined with prepassivation resulted in a more effective bonding surface than mechanical polishing.
    • Bond strength varied depending on the alloy and the specific cementation parameters used.

    Conclusions:

    • The timing of interface formation during the acrylic bone cement setting cycle significantly impacts bond strength.
    • Surface preparation methods, specifically electropolishing with prepassivation, enhance metal-cement adhesion.
    • Optimized cementation parameters are essential for reliable fixation of orthopaedic implants using acrylic bone cement and surgical alloys.