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Sagittal placement of the femoral component in total knee arthroplasty predicts knee flexion contracture at one-year follow-up
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Sagittal placement of the femoral component in total knee arthroplasty predicts knee flexion contracture at one-year follow-up
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Sagittal placement of the femoral component in total knee arthroplasty predicts knee flexion contracture at one-year follow-up
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Journal Article
Sagittal placement of the femoral component in total knee arthroplasty predicts knee flexion contracture at one-year follow-up
2012
Overview
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.
Publisher
Springer-Verlag,Springer Nature B.V
Subject
/ Arthroplasty, Replacement, Knee - adverse effects
/ Arthroplasty, Replacement, Knee - methods
/ CAS
/ Contracture - physiopathology
/ Female
/ Gender
/ Humans
/ Knee
/ Knee Joint - physiopathology
/ Male
/ Medicine
/ Osteoarthritis, Knee - physiopathology
/ Osteoarthritis, Knee - surgery
/ Patients
/ Postoperative Complications - etiology
/ Surgeons
