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Related Experiment Videos

Stem revision: special implant versus primary device.

P Cherubino1, M F Surace, G Zatti

  • 1Dipartimento di Scienze Ortopediche e Traumatologiche Mario Boni, Facoltà di Medicina e Chirurgia, Università degli Studi dell'Insubria, Varese, Italy.

La Chirurgia Degli Organi Di Movimento
|May 19, 2004
PubMed
Summary

Hip revision surgery aims to restore function and alleviate pain by addressing bone stock loss. The choice of revision stem depends on the severity of femoral bone loss, with options ranging from primary stems to specialized revision systems.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Engineering

Background:

  • Hip revision surgery addresses pain and functional deficits caused by implant loosening or bone loss.
  • Femoral bone stock impairment, often due to lysis, significantly influences the selection of revision hip stems.
  • Current literature presents various stem revision strategies based on the extent of proximal bone defects.

Purpose of the Study:

  • To review current approaches for hip revision surgery, focusing on stem selection based on bone stock assessment.
  • To compare different femoral revision stem options, including the Wagner stem and modular stems.
  • To report early experiences with the ZMR taper modular revision stem.

Main Methods:

  • Literature review of classifications for femoral bone stock loss.
  • Analysis of stem revision techniques, including distal fixation methods like the Wagner stem and modular stems.

Related Experiment Videos

  • Presentation of early clinical outcomes for a novel modular revision stem (ZMR taper).

    • Main Results:

    • Minimal proximal bone defects are typically managed with primary implant stems.
    • Bridging larger bony gaps necessitates distal fixation, with Wagner and modular stems being key options.
    • Modular stems aim to mitigate complications associated with the Wagner stem, though new challenges like proximal overfill and fretting corrosion exist.

    Conclusions:

    • Stem selection in hip revision is critically dependent on the degree of femoral bone stock impairment.
    • Both Wagner and modular stems offer solutions for significant bone loss, each with distinct advantages and disadvantages.
    • Further evaluation of newer modular revision stems, such as the ZMR taper, is warranted to assess their efficacy and safety.