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Related Experiment Videos

Retrieved glenoid components: a classification system for surface damage analysis.

Stephen B Gunther1, Jove Graham, Tom R Norris

  • 1Department of Orthopaedic Surgery, University of California, San Francisco 94143, USA. gunthers@orthosurg.ucsf.edu

The Journal of Arthroplasty
|January 24, 2002
PubMed
Summary
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This study analyzed retrieved total shoulder glenoid components, revealing abrasive wear and fatigue as primary failure mechanisms. These findings highlight combined surface wear and subsurface fatigue in shoulder arthroplasty failure.

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Failure Analysis

Background:

  • Previous research documented damage in hip and knee arthroplasty components.
  • Surface wear is common in total hip arthroplasties, while fatigue failure (pitting, delamination) is more frequent in total knee components.
  • No prior analysis existed for retrieved polyethylene glenoid components.

Purpose of the Study:

  • To evaluate wear mechanisms contributing to the failure of total shoulder glenoid components.
  • To establish a classification system for glenoid component damage.
  • To compare damage modes with those observed in hip and knee arthroplasties.

Main Methods:

  • Analysis of polyethylene glenoid components from 10 consecutive total shoulder arthroplasties.

Related Experiment Videos

  • Low-power magnification examination of wear mechanisms.
  • Adaptation of existing hip and knee damage classification systems for glenoid components.
  • Grading of damage severity in four quadrants.

    • Main Results:

    • Abrasion, pitting, and delamination were the most prevalent damage modes.
    • Data indicated a combination of abrasive wear and fatigue in retrieved total shoulder specimens.
    • Both surface wear and subsurface fatigue failure mechanisms were identified.

    Conclusions:

    • Retrieved total shoulder glenoid components exhibit a combination of abrasive wear and fatigue.
    • Surface wear and subsurface fatigue are significant contributors to glenoid implant failure.
    • The developed classification system provides a framework for analyzing glenoid component damage.