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Related Experiment Videos

Observations on retrieved polyethylene glenoid components.

M M Scarlat1, F A Matsen

  • 1Shoulder and Elbow Service, Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington 98195-6500, USA. matsen@u.washington.edu

The Journal of Arthroplasty
|September 8, 2001
PubMed
Summary
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Retrieved polyethylene glenoid components show significant wear and deformation after implantation. These changes, including erosion and fracture, are linked to revision surgery and instability in shoulder arthroplasty.

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Wear Analysis

Background:

  • Polyethylene components in hip and knee replacements undergo changes after implantation.
  • Limited data exists on the condition of retrieved polyethylene glenoid components.

Purpose of the Study:

  • To investigate the in vivo changes in retrieved polyethylene glenoid components.
  • To correlate component condition with reasons for revision arthroplasty.

Main Methods:

  • Analysis of 39 retrieved polyethylene glenoid components.
  • Evaluation of clinical data for revision arthroplasty reasons.
  • Assessment of component surface morphology and integrity.

Main Results:

  • Common reasons for revision included glenoid component loosening and glenohumeral instability.

Related Experiment Videos

  • Most components exhibited altered articular surface contours.
  • Observed issues included rim erosion (28), surface irregularities (27), fractures (11), and central wear (9).

    • Conclusions:

    • Retrieved glenoid components demonstrate significant polyethylene deformation in vivo.
    • Compromised arthroplasty mechanics may contribute to polyethylene degradation.
    • These findings highlight the need for further research into glenoid component longevity and design.