Effect of Posterior Tibial Slope on Flexion and Anterior-Posterior Tibial Translation in Posterior Cruciate-Retaining Total Knee Arthroplasty

Andrew W. Chambers, Addison R. Wood, Victor Kosmopoulos, Hugo B. Sanchez, Russell A. Wagner

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Reduced posterior tibial slope (PTS) and posterior tibiofemoral translation (PTFT) in posterior cruciate-retaining (PCR) total knee arthroplasty (TKA) may result in suboptimal flexion. We evaluated the relationship between PTS, PTFT, and total knee flexion after PCR TKA in a cadaveric model. We performed a balanced PCR TKA using 9 transfemoral cadaver specimens and changed postoperative PTS in 1° increments. We measured maximal flexion and relative PTFT at maximal flexion. We determined significant changes in flexion and PTFT as a function of PTS. Findings showed an average increase in flexion of 2.3° and average PTFT increase of 1. mm per degree of PTS increase when increasing PTS from 1° to 4° (P<.05). Small initial increases in PTS appear to significantly increase knee flexion and PTFT.

Original languageEnglish
Pages (from-to)103-106
Number of pages4
JournalJournal of Arthroplasty
Volume31
Issue number1
DOIs
StatePublished - 1 Jan 2016

Keywords

  • Maximum flexion
  • Posterior tibial slope
  • Posterior tibial translation
  • Primary knee arthroplasty
  • Tibiofemoral translation
  • Total knee replacement

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