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Related Experiment Videos

[The Mecron-titanium prosthesis]

M Herzberger1, T Hill, K Rossak

  • 1Orthopädische Klinik, St. Vincentiuskrankenhüser Karlsruhe.

Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete
|November 1, 1993
PubMed
Summary
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Titanium hip stems showed superior clinical outcomes compared to Chromium-Cobalt-Molybdenum stems in a 2-5 year follow-up. Titanium demonstrated higher patient satisfaction and less femoral sclerosis on X-rays.

Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Medical device engineering

Background:

  • Cementless hip endoprostheses are widely used for hip joint replacement.
  • Assessing the long-term performance and material effects of different implant stems is crucial for patient outcomes.
  • Titanium alloys and Chromium-Cobalt-Molybdenum alloys are common materials for hip prosthesis stems.

Purpose of the Study:

  • To compare the clinical and radiological outcomes of cementless hip endoprostheses with Mecron-Titanium stems versus Chromium-Cobalt-Molybdenum stems.
  • To evaluate the duration and success rates of these two types of hip implants over a 2-5 year follow-up period.

Main Methods:

  • A comparative study involving 59 Mecron-Titanium-prostheses and 56 Chromium-Cobalt-Molybdenum-stem prostheses.

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  • Clinical evaluation using the Merle d'Aubigné scale and radiological assessment over a 2-5 year follow-up.
  • Analysis of radiographic signs of femoral sclerosis and implant loosening.

    • Main Results:

    • Titanium stems achieved 93.2% "very good" to "satisfactory" results, compared to 85.71% for Chromium-Cobalt-Molybdenum stems.
    • X-ray analysis indicated less femoral sclerosis with Titanium stems than with Chromium-Cobalt-Molybdenum stems.
    • Radiologic signs of loosening did not correlate with subjective or clinical results for either stem type.

    Conclusions:

    • Mecron-Titanium stems demonstrate favorable clinical outcomes and potentially reduced femoral response compared to Chromium-Cobalt-Molybdenum stems in cementless hip endoprostheses.
    • While radiological signs of loosening were observed, they did not consistently impact patient-reported or clinical outcomes.
    • Further investigation is warranted, acknowledging limitations due to incomplete patient follow-up.