Micromotion of cementless tibial baseplates: Keels with adjuvant pegs offer more stability than pegs alone

Safia Bhimji, R. Michael Meneghini

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Initial implant stability is crucial to cementless knee arthroplasty fixation. The objective of this study was to evaluate the stability of two baseplates with different fixation features: a monoblock porous tantalum baseplate featuring two hexagonal pegs alone, and a modular design featuring a keel with four adjuvant cruciform pegs. A physiologically relevant test method previously described was used to evaluate compression and liftoff of the baseplates during stair descent. The porous tantalum baseplate with dual-hex peg fixation experienced greater rocking motions and liftoff compared to the baseplate with a keel and adjuvant pegs. Liftoff and displacement motion is likely deleterious and may inhibit biological fixation due to the physical separation of the baseplate from the bone.

Original languageEnglish (US)
Pages (from-to)1503-1506
Number of pages4
JournalJournal of Arthroplasty
Volume29
Issue number7
DOIs
StatePublished - Jul 2014

Keywords

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

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Fingerprint Dive into the research topics of 'Micromotion of cementless tibial baseplates: Keels with adjuvant pegs offer more stability than pegs alone'. Together they form a unique fingerprint.

  • Cite this