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Related Experiment Videos

Cementless total hip arthroplasty with a threaded acetabular cup

J Fernández-González1, R Canosa Sevillano, C García-Araujo

  • 1Department of Orthopaedic Surgery, Hospital La Princesa, Madrid, Spain.

International Orthopaedics
|January 1, 1997
PubMed
Summary

Smooth threaded cups in cementless total hip arthroplasty show poor long-term results. With 18% failure due to aseptic loosening and osteolysis, these cups are not a good alternative to cemented options.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science

Background:

  • Cementless total hip arthroplasty aims for biological fixation.
  • Smooth threaded cups were introduced as an alternative fixation method.

Purpose of the Study:

  • To evaluate the long-term clinical and radiological outcomes of smooth threaded cups in total hip arthroplasty.

Main Methods:

  • Retrospective study of 80 cementless total hip arthroplasties using smooth threaded cups.
  • Clinical and radiological assessment of 60 patients with a mean 6-year follow-up.

Main Results:

  • 18% of cups failed due to aseptic loosening, with 6 requiring revision and 5 awaiting revision.
  • Radiographic analysis revealed 43% fibrous-stable fixation, which requires monitoring for osteolysis.

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  • Deficient osteointegration and wear debris contributed to long-term deterioration.

    • Conclusions:

    • Smooth threaded cups demonstrate inferior long-term outcomes compared to cemented cups.
    • Fibrous-stable fixation necessitates vigilance for osteolysis to prevent failure.
    • This implant design is not recommended as a viable alternative to cemented acetabular components.