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Related Experiment Videos

Acetabular reaction to the Bateman bipolar prosthesis.

E Vázquez-Vela1, G Vázquez-Vela

  • 1Department of Orthopaedics, Hospital General Dr. Manuel Gea Gonzalez, Mexico City.

Clinical Orthopaedics and Related Research
|February 1, 1990
PubMed
Summary

The Bateman bipolar prosthesis generally tolerates acetabular bone well, even with pre-existing damage. Long-term studies show acetabular changes often stabilize or improve after hip replacement surgery.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Materials science

Background:

  • The Bateman bipolar prosthesis has been utilized since 1974.
  • Concerns exist regarding its function as a bipolar device versus a unipolar hemiarthroplasty.
  • Potential acetabular damage from unipolar function requires investigation.

Purpose of the Study:

  • To evaluate the functional behavior of the Bateman bipolar prosthesis.
  • To determine if the prosthesis functions as intended (bipolar) or as a unipolar hemiarthroplasty.
  • To assess the long-term response of the acetabulum to the implant.

Main Methods:

  • Retrospective analysis of 478 hip replacements performed between 1973 and 1983.
  • Random selection of 19 cases exhibiting acetabular changes for detailed evaluation.

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  • Ten-year follow-up to monitor prosthesis response and acetabular integrity.

    • Main Results:

    • Of 11 cases with pre-operative protrusio, six showed acetabular wall thickening; five had no changes, and one required revision.
    • Subchondral cysts in five patients tended to resolve over the follow-up period.
    • Acetabular subchondral sclerosis decreased in three patients.

    Conclusions:

    • The acetabulum demonstrates good tolerance to the Bateman bipolar prosthesis, even with initial damage.
    • Acetabular bone changes observed pre-operatively often stabilize or improve post-implantation.
    • Further research is needed to correlate implant function (bipolar vs. unipolar) with friction and movement.