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Related Experiment Videos

Clinical experience with primary cemented total hip arthroplasty.

R S Ling1

  • 1Princess Elizabeth Orthopaedic Hospital, Exeter, Devon, U.K.

La Chirurgia Degli Organi Di Movimento
|October 1, 1992
PubMed
Summary

This study evaluated 433 cemented hip prostheses, finding low revision rates for stem and socket loosening. Tapered stem design showed biomechanical relevance in long-term cemented hip implant outcomes.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Materials science

Background:

  • Long-term outcomes of cemented hip prostheses are crucial for patient care.
  • Understanding implant design impact on revision rates is essential.

Purpose of the Study:

  • To evaluate clinical and radiographic outcomes of 433 original design cemented hip prostheses implanted since 1969.
  • To assess the long-term performance and revision rates of these implants.

Main Methods:

  • Retrospective analysis of 433 cemented hip prostheses implanted at Exeter.
  • Clinical and radiographic follow-up evaluation of 88% of cases.
  • Assessment of revision causes including stem/socket loosening and sepsis.

Main Results:

  • Overall revision rate was 14.3% (62/433 prostheses).
  • Stem loosening occurred in 3% (13/433) and socket loosening in 4.9% (21/433) of cases, with all sockets revised.
  • Stem sinking >2mm observed in 15% at 16.4 years, without pain correlation; no complete radiolucent lines around stems were noted.

Conclusions:

  • The original design cemented hip prostheses demonstrated acceptable long-term outcomes with low revision rates.
  • Tapered, smooth, collarless stem design may have biomechanical advantages in cemented hip arthroplasty.
  • Further investigation into stem sinking and its clinical significance is warranted.

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