Retrieval analysis of failed constrained acetabular liners. Academic Article uri icon

Overview

abstract

  • Despite the large loads placed upon constrained acetabular liners, little is known of their mechanical performance. We analyzed retrieved liners to determine wear and other damage modes and assess associations between types and severity of damage and clinical, radiographic, and implant variables. Outer rim impingement frequency and severity were higher than that for the inner rim. The 20 degrees elevation was most frequently affected by impingement. Inner rim impingement was more frequent with small heads. Outer bearing surface wear scores were higher than inner bearing scores. Liners removed for infection or stem failure had similar damage compared with other groups, demonstrating the complex relationship of impingement and wear with clinical performance. No association was found between liner damage and clinical and radiographic variables.

publication date

  • July 4, 2009

Research

keywords

  • Acetabulum
  • Arthroplasty, Replacement, Hip
  • Equipment Failure Analysis
  • Hip Prosthesis
  • Prosthesis Failure

Identity

Scopus Document Identifier

  • 68749090778

Digital Object Identifier (DOI)

  • 10.1016/j.arth.2009.05.002

PubMed ID

  • 19577883

Additional Document Info

volume

  • 24

issue

  • 6 Suppl