Comparison of gait kinematics in total and unicondylar knee replacement surgery

A. Agarwal, S. Miller, W. Hadden, L. Johnston, W. Wang, G. Arnold, R. J. Abboud

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
52 Downloads (Pure)


Introduction: This study is aimed to compare kinematic gait data of patients who have undergone total and unicondylar knee replacement.

Materials and methods: This single-surgeon retrospective cohort study evaluated 13 patients with unilateral total knee arthroplasty (TKA) and 14 unicondylar knee arthroplasty (UKA). Gait analysis was carried out using a Vicon motion analysis system. The limits of knee flexion during stance phase, at heel strike and at loading response were measured.

Results: The total range of motion of the UKA knees was significantly greater than the TKA knees. UKA knees exhibited significantly greater knee extension during the stance phase than the TKA knees. Unlike TKA, UKA knees demonstrated improved knee flexion during the gait cycle when compared to the contralateral non-operated knee. The hips also demonstrated near normal hip flexion in UKA patients. Predictably, UKA knees had significantly greater varus compared with TKA in the coronal plane. Spatiotemporal variables demonstrated similar walking speed and step length to aid a fair comparison between knee replacement groups.

Conclusions: The UKA knees moved more physiologically in the sagittal plane with a greater range of motion during gait. Despite having a stiff gait pattern, the patients undergoing TKA demonstrated a more neutral alignment in the coronal plane. Neither type of knee arthroplasty restored knee kinematics to those of the non-operated side.
Original languageEnglish
Pages (from-to)391-398
Number of pages8
JournalAnnals of the Royal College of Surgeons of England
Issue number6
Early online date3 Jun 2019
Publication statusPublished - 6 Jul 2019


  • Total knee arthroplasty
  • Unicondylar knee arthroplasty
  • Gait analysis
  • Kinematics
  • Range of Motion, Articular/physiology
  • Arthroplasty, Replacement, Knee/adverse effects
  • Gait Analysis
  • Humans
  • Male
  • Biomechanical Phenomena/physiology
  • Gait/physiology
  • Female
  • Aged
  • Retrospective Studies


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