Initial stability of press-fit acetabular components under rotational forces.

Journal Article (Journal Article)

The primary goal of this study was to determine the initial press-fit stability in acetabular components without screw fixation. Mechanical testing was performed with the implantation of press-fit acetabular components in cadaveric specimens. No significant difference was found in load to failure testing between 1 and 2 mm of under-reaming. However, there was significant variability in bending forces required to create 150 μm of micromotion ranging from 49.3 N to 214.4 N. This study shows that cups implanted in a press-fit fashion, which are felt to be clinically stable, have high degrees of variability in resisting load and may be at risk for loosening. There is a need for more objective intra-operative techniques to test cup stability.

Full Text

Duke Authors

Cited Authors

  • Fehring, KA; Owen, JR; Kurdin, AA; Wayne, JS; Jiranek, WA

Published Date

  • May 2014

Published In

Volume / Issue

  • 29 / 5

Start / End Page

  • 1038 - 1042

PubMed ID

  • 24238907

Electronic International Standard Serial Number (EISSN)

  • 1532-8406

Digital Object Identifier (DOI)

  • 10.1016/j.arth.2013.10.009


  • eng

Conference Location

  • United States