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Related Experiment Video

Updated: May 8, 2026

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
07:43

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

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Accurate alignment and high function after kinematically aligned TKA performed with generic instruments.

Stephen M Howell1, Stelios Papadopoulos, Kyle T Kuznik

  • 1Department of Mechanical Engineering, University of California at Davis, Davis, CA, USA, sebhowell@mac.com.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
|August 17, 2013
PubMed
Summary
This summary is machine-generated.

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Kinematically aligned total knee arthroplasty (TKA) using generic instruments achieves high patient function. This cost-effective method demonstrates accurate alignment in most cases, regardless of outlier status.

Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering

Background:

  • Patient-specific instrumentation for total knee arthroplasty (TKA) is costly.
  • Kinematically aligned TKA with generic instruments offers a potentially more affordable alternative.
  • The alignment and functional outcomes of this technique require investigation.

Purpose of the Study:

  • To evaluate the alignment and functional outcomes of kinematically aligned TKA performed with generic instruments.
  • To compare the results with established benchmarks for TKA success.

Main Methods:

  • A prospective study of 101 patients undergoing kinematically aligned TKA with generic instruments.
  • Alignment was assessed using multiple measures including scanogram, knee CT, and intraoperative data.
  • Patient function was evaluated using Oxford Knee and WOMAC™ scores.

Related Experiment Videos

Last Updated: May 8, 2026

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
07:43

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

Published on: July 2, 2021

Main Results:

  • High accuracy was observed for mechanical limb alignment (93%), joint line (94%), and femoral-tibial rotation (98%).
  • Anatomic knee axis and tibial component rotation showed lower accuracy rates.
  • Mean Oxford Knee score was 42 and WOMAC™ score was 89, indicating high function.
  • Functional outcomes were similar for in-range and outlier alignments.

Conclusions:

  • Generic instruments are suitable for kinematically aligned TKA.
  • This approach achieves accurate alignment in most parameters and restores high function.
  • The technique is preferred over mechanically aligned TKA due to cost-effectiveness and functional outcomes.