The stability of the cemented tibial component of total knee arthroplasty: Posterior cruciate-retaining versus posterior-stabilized design

Fabio Catani, Alberto Leardini, Andrea Ensini, Giuseppe Cucca, Laura Bragonzoni, Soren Toksvig-Larsen, Sandro Giannini

Research output: Contribution to journalArticlepeer-review

Abstract

Micromotion of the tibial component in 40 knee arthroplasties for gonarthrosis was studied using Roentgen stereophotogrammetric analysis. The stability of this component was assessed for 2 years' postoperatively. In all arthroplasties, an attempt was made to reconstruct the preoperative posterior slope. Posterior cruciate-retaining (CR) and posterior-stabilized (PS) components showed at 2 years a maximum total point motion of 0.6 ± 0.4 mm and 0.7 ± 0.5 mm, respectively. Whereas 92.5% of the implants were determined to be stable, 1 of the CR group and 2 of the PS group displayed migration between the first and the second year of at least 0.2 mm. A negative correlation between subsidence of the tibial component at 2 years of follow-up and the difference between preoperative and postoperative tibial slope was found. Consequently, we suggest that restoring the original posterior slope of the tibial plateau must be a goal of tibial component implantation.

Original languageEnglish
Pages (from-to)775-782
Number of pages8
JournalJournal of Arthroplasty
Volume19
Issue number6
DOIs
Publication statusPublished - Sep 2004

Keywords

  • posterior cruciate-retaining
  • posterior-stabilized
  • Roentgen stereophotogrammetry
  • tibial posterior slope
  • total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

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