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International Orthopaedics

, Volume 36, Issue 9, pp 1835–1839 | Cite as

Sagittal placement of the femoral component in total knee arthroplasty predicts knee flexion contracture at one-year follow-up

  • Sebastien Lustig
  • Corey J. Scholes
  • Tim J. Stegeman
  • Sam Oussedik
  • Myles R. J. Coolican
  • David A. Parker
Original Paper

Abstract

Purpose

Flexion contracture has been shown to impair function and reduce satisfaction following total knee arthroplasty (TKA). The aim of this study was to identify modifiable intra-operative variables that predict post-TKA knee extension.

Methods

Data was collected prospectively on 95 patients undergoing total knee arthroplasty, including pre-operative assessment, intra-operative computer assisted surgery (CAS) measurements and functional outcome including range of motion at one year. Patients were divided into two groups: those with mild flexion contracture (> 5°) at the one-year follow-up and those achieving full extension.

Results

The sagittal orientation of the distal femoral cut differed significantly between groups at the one-year follow-up (p = 0.014). Sagittal alignment of greater than 3.5° from the mechanical axis was shown to increase the relative risk of a mild flexion contracture at one-year follow-up by 2.9 times, independent of other variables.

Conclusion

Increasing the sagittal alignment of the distal femoral cut more than 3.5° from the mechanical axis is an independent risk factor for clinically detectable flexion contracture one year from index procedure.

Keywords

Total Knee Arthroplasty Femoral Component Flexion Contracture Sagittal Alignment Primary Total Knee Arthroplasty 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Sebastien Lustig
    • 1
  • Corey J. Scholes
    • 1
  • Tim J. Stegeman
    • 1
  • Sam Oussedik
    • 1
  • Myles R. J. Coolican
    • 1
  • David A. Parker
    • 1
  1. 1.Sydney Orthopaedic Research InstituteChatswoodAustralia

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