Initial stability of press-fit acetabular components: an in vitro biomechanical study. Academic Article uri icon

Overview

MeSH

  • Acetabulum
  • Biomechanical Phenomena
  • Cementation
  • Humans
  • Prosthesis Design
  • Torque

MeSH Major

  • Bone Screws
  • Hip Prosthesis

abstract

  • Component shape, surface finish, and presence of holes for adjuvant screw fixation should all affect initial stability and hence long-term fixation of total hip acetabular components. We conducted a study to determine stability against edge loading and torsion in commercial implants that differed in these design variables. Components were seated into synthetic cancellous bone blocks, and loads and insertion energies necessary to seat the components were measured. Components were then edge-loaded or twisted to failure. Compared with several hemispherical components, an elliptical component without holes and sintered beads had significantly more stability under both loading conditions. The presence of more holes in hemispherical components significantly improved stability in edge loading but not in torsion. Finally, plasma-spray and small-bead coatings showed improved stability compared with fiber-mesh and large-bead coatings.

publication date

  • October 2008

has subject area

  • Acetabulum
  • Biomechanical Phenomena
  • Bone Screws
  • Cementation
  • Hip Prosthesis
  • Humans
  • Prosthesis Design
  • Torque

Research

keywords

  • Journal Article
  • Randomized Controlled Trial

Identity

Language

  • eng

PubMed ID

  • 19081881

Additional Document Info

start page

  • 519

end page

  • 522

volume

  • 37

number

  • 10