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Total hip replacements using the ceramic Mittelmeier prosthesis

M H Huo1, R P Martin, L E Zatorski

  • 1Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

Clinical Orthopaedics and Related Research
|November 1, 1996
PubMed
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This study evaluated the Mittelmeier ceramic prosthesis in total hip replacements. While revision rates were low, mechanical failures occurred in over 20% of cases, with no osteolysis observed.

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Clinical Orthopedics

Background:

  • Total hip replacement (THR) is a common procedure for hip joint pathology.
  • Ceramic prostheses offer potential advantages in wear resistance and biocompatibility.
  • Long-term outcomes of uncemented ceramic prostheses require continued evaluation.

Purpose of the Study:

  • To assess the long-term clinical and radiographic outcomes of the Mittelmeier ceramic prosthesis in primary total hip replacement.
  • To evaluate the survival rates and failure modes of this specific uncemented ceramic implant.
  • To determine the incidence of osteolysis in patients receiving the Mittelmeier ceramic prosthesis.

Main Methods:

  • Prospective follow-up of 93 primary total hip replacements performed between January 1983 and July 1984.

Related Experiment Videos

  • Implantation of the Mittelmeier ceramic prosthesis (uncemented) by a single surgeon for osteoarthritis or osteonecrosis.
  • Minimum follow-up of 60 months, with a median follow-up of 108 months.

    • Main Results:

    • Five (5.4%) hips required revision surgery due to loosening.
    • 77 (87.5%) of the remaining hips were rated clinically satisfactory.
    • Cumulative survival probability was 92.7% at 5 years and 87.9% at 10 years.
    • Overall mechanical failure rates were 21.5% for the cup and 22.6% for the stem.
    • No cases of femoral or acetabular osteolysis were observed.

    Conclusions:

    • The Mittelmeier ceramic prosthesis demonstrated a low revision rate for loosening and absence of osteolysis in this cohort.
    • Significant rates of mechanical failure for both cup and stem components were observed.
    • Long-term survival is acceptable, but mechanical integrity of the components warrants consideration.