Effect of porous coating and loading conditions on total hip femoral stem stability

Frances B. Biegler, Jeffrey D. Reuben, Timothy P. Harrigan, Fu J. Hou, John E. Akin

Research output: Contribution to journalArticlepeer-review

Abstract

An examination of femoral bone-prosthesis interface behavior under different load types is undertaken using finite-element analysis. Three-dimensional finite-element models are made of two designs of hip prostheses after implantation in a femur. Femoral geometry was determined by computed tomography scans. The models were loaded in one-legged stance and stairclimbing configurations. The implants were modeled as both smooth surfaced and porous coated. The amount of contact and the relative motion between bone and implant were calculated. It is shown that torsional loads such as occur during stairclimbing contribute to larger amounts of implant micromotion than does stance loading. Contact at the bone-prosthesis interface is more dependent on load type than on implant geometry or surface coating type.

Original languageEnglish (US)
Pages (from-to)839-847
Number of pages9
JournalThe Journal of Arthroplasty
Volume10
Issue number6
DOIs
StatePublished - Dec 1995
Externally publishedYes

Keywords

  • contact
  • finite-element analysis
  • prosthesis
  • stability
  • total hip arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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