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Related Experiment Videos

Surface cross-linked UHMWPE using peroxides.

Rizwan M Gul1,2, Katharina Fung1, Brinda N Doshi1

  • 1Harris Orthopedic Laboratory, Massachusetts General Hospital, 55 Fruit St. GRJ 1206, Boston 02114, Massachusetts.

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
|April 5, 2017
PubMed
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Surface crosslinking of ultra-high molecular weight polyethylene (UHMWPE) with vitamin E improves wear resistance. This novel technique enhances orthopedic implant durability without compromising mechanical strength.

Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Orthopedic Engineering

Background:

  • Ultra-high molecular weight polyethylene (UHMWPE) is a key material for orthopedic implants.
  • Improving UHMWPE's wear performance is crucial for extending implant lifespan.
  • Bulk crosslinking reduces mechanical properties, necessitating surface-specific treatments.

Purpose of the Study:

  • To develop and evaluate a novel surface crosslinking technique for UHMWPE/vitamin-E blends.
  • To assess the impact of surface crosslinking on wear rate and oxidation resistance.
  • To compare the efficacy of two different organic peroxides for surface modification.

Main Methods:

  • Consolidated UHMWPE/vitamin-E blends were treated with organic peroxides.
  • Peroxide diffusion into the polymer surface was followed by thermal decomposition.
Keywords:
biomaterialship and knee arthroplastyimplant wearpolyethelene and biomaterials

Related Experiment Videos

  • Surface crosslink density and wear rate were quantified.
  • Oxidation resistance was evaluated with the addition of vitamin E.

    • Main Results:

    • Both tested peroxides successfully induced surface crosslinking in UHMWPE/vitamin-E blends.
    • Surface crosslinked samples exhibited significantly improved wear resistance.
    • Wear resistance was comparable to state-of-the-art highly crosslinked UHMWPE.
    • Incorporation of vitamin E enhanced the material's oxidation resistance.

    Conclusions:

    • The novel surface crosslinking technique effectively enhances UHMWPE wear performance.
    • This method offers a promising approach for developing durable orthopedic implants.
    • Combining surface crosslinking with vitamin E provides dual benefits of wear and oxidation resistance.