Micromotion of Cementless Tibial Baseplates Under Physiological Loading Conditions

Safia Bhimji, R. Meneghini

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Initial implant stability is crucial to cementless knee arthroplasty success. The objective of this study was to develop a physiological relevant methodology that incorporates torsion, shear, and compression forces to evaluate two tibial component designs that feature either a keel or cylindrical porous metal pegs. The data were compared with a simplified compression loading scenario. Results show a loading profile that combines compressive, shear, and torsional loads results in significantly larger motions than occur when loading in compression only. When comparing between a keeled and a pegged device, the new method shows significant differences in tibial component subsidence/liftoff at the anterior and posterior locations, which were lacking in the simplified test model. To accurately assess implant stability, studies should use physiological relevant loading.

Original languageEnglish
Pages (from-to)648-654
Number of pages7
JournalJournal of Arthroplasty
Volume27
Issue number4
DOIs
StatePublished - Apr 2012

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Knee Replacement Arthroplasties
Metals
Equipment and Supplies

Keywords

  • Cementless baseplates
  • Keels
  • Micromotion
  • Pegs
  • Stability
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Micromotion of Cementless Tibial Baseplates Under Physiological Loading Conditions. / Bhimji, Safia; Meneghini, R.

In: Journal of Arthroplasty, Vol. 27, No. 4, 04.2012, p. 648-654.

Research output: Contribution to journalArticle

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