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[Polyethylene liner dislocation in Harris Galante acetabular components].

D Neumann1, U Dorn

  • 1Landesklinik für Orthopädie St. Johanns Spital, Salzburg. D.Neumann@lks.at

Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete
|April 16, 2003
PubMed
Summary

Failure of the acetabular locking mechanism in Harris-Galante components can cause polyethylene liner dislocation. This study presents seven cases, highlighting the need for careful monitoring and timely revision to prevent implant failure.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Medical Device Engineering

Background:

  • The Harris-Galante acetabular component is widely used in total hip arthroplasty.
  • Failure of the acetabular locking mechanism can lead to polyethylene liner dislocation and dissociation.

Purpose of the Study:

  • To present seven cases of liner dislocation caused by acetabular locking mechanism failure in Harris-Galante components.
  • To investigate the incidence and consequences of this specific failure mode.

Main Methods:

  • Retrospective review of seven patients with Harris-Galante acetabular components presenting with liner dislocation.
  • Analysis of clinical data, radiographs, operative notes, and explanted components.
  • Intraoperative assessment of acetabular component stability and locking mechanism integrity.

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Main Results:

  • Seven cases of polyethylene liner dislocation due to locking mechanism failure were identified.
  • Components had been implanted for an average of 5.3 years.
  • Two acetabular shells required complete removal due to severe locking mechanism destruction; five liners were exchanged.

Conclusions:

  • Failure of the acetabular locking mechanism is a significant cause of polyethylene liner dislocation in Harris-Galante components.
  • This failure mode may be underreported in existing literature.
  • Timely revision, including liner exchange or shell replacement, is crucial for managing these complications.