Identifying car ingress movement strategies before and after total knee replacement

Sokratis Komaris*, Cheral Govind, Jon Clarke, Alistair Ewen, Artaban Jeldi, Andrew Murphy, Philip Riches

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Background: Post-operative performance of knee bearings is typically assessed in activities of daily living by means of motion capture. Biomechanical studies predominantly explore common tasks such as walking, standing and stair climbing, while overlooking equally demanding activities such as embarking a vehicle. Aims: The aim of this work is to evaluate changes in the movement habits of patients after total knee arthroplasty surgery in comparison to healthy age-matched control participants. Methods: A mock-up car was fabricated based on the architecture of a common vehicle. Ten control participants and 10 patients with severe osteoarthritis of the knee attended a single- and three-motion capture session(s), respectively. Participants were asked to enter the car and sit comfortably adopting a driving position. Three trials per session were used for the identification of movement strategies by means of hierarchical clustering. Task completion time was also measured. Results: Patients’ movement behaviour didn’t change significantly following total knee arthroplasty surgery. Control participants favoured different movement strategies compared to patients post-operatively. Group membership, height and sidedness of the affected joint were found to be non-significant in task completion time. Conclusion: This study describes an alternative movement identification technique for the analysis of the ingress movement that may be used to clinically assess knee bearings and aid in movement simulations and vehicle design.

Original languageEnglish
Pages (from-to)9-18
Number of pages10
JournalInternational Biomechanics
Issue number1
Early online date22 Jan 2020
Publication statusE-pub ahead of print - 22 Jan 2020

Bibliographical note

© 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use,distribution, and reproduction in any medium, provided the original work is properly cited.


  • biomechanics
  • hierarchical clustering
  • motion analysis
  • Movement strategy identification
  • osteoarthritis
  • total knee arthroplasty


Dive into the research topics of 'Identifying car ingress movement strategies before and after total knee replacement'. Together they form a unique fingerprint.

Cite this