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Related Experiment Videos

The Stanmore total hip replacement. A 22-year follow-up.

C L Gerritsma-Bleeker1, R Deutman, T J Mulder

  • 1Department of Orthopaedic Surgery, Martini Hospital, Groningen, The Netherlands.

The Journal of Bone and Joint Surgery. British Volume
|March 4, 2000
PubMed
Summary

This study tracked primary hip replacement outcomes over 22 years. Most original prostheses remained functional, with high survival rates, indicating long-term success for hip implants.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Geriatric Medicine

Background:

  • Long-term outcomes of primary hip replacements are crucial for clinical decision-making.
  • Previous follow-ups reported on this cohort at 10 and 15 years.

Purpose of the Study:

  • To assess the 22-year clinical outcome and survival rates of primary hip prostheses implanted between 1975 and 1976.
  • To evaluate the longevity and performance of early hip replacement implants in a surviving patient cohort.

Main Methods:

  • Prospective review of 21 surviving patients (22 hips) from an initial cohort of 135 patients.
  • Clinical assessment of prosthesis stability, patient satisfaction, and radiographic evaluation for wear and loosening.
  • Calculation of cumulative survival rates for the prosthesis, stem, and cup.

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Main Results:

  • Nineteen of 21 patients (20 hips) still retained their original prosthesis after 22 years, with a mean patient age of 85.7 years.
  • High implant survival rates: 85% for the prosthesis, 91% for the stem, and 88% for the cup.
  • One cup was loose, and 40% of cups showed wear, but these were not significant clinical problems for most patients.

Conclusions:

  • Primary hip prostheses implanted in the mid-1970s demonstrated excellent long-term durability and survival rates up to 22 years.
  • Despite age-related activity limitations, most patients reported satisfaction with their original hip replacements.
  • These findings support the enduring efficacy of early hip replacement designs.