A blinded, three-arm randomised trial assessing joint function and measuring three-dimensional knee joint kinematics in individuals six months after a total knee joint replacement; comparing a medially stabilised design, to standard fixed bearing conventional designs – posterior stabilising and cruciate retaining

Authors

  • Michelle M. Dowsey Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Level 3 Daly Wing, 41 Victoria Parade, Fitzroy, Victoria 3065 Department of Surgery, University of Melbourne, Level 2 Clinical Sciences Building, St. Vincent’s Hospital Melbourne, 29 Regent Street, Fitzroy, Victoria 3065
  • Marcus Pandy Department of Mechanical Engineering, Melbourne School of Engineering, University of Melbourne, Grattan Street, Parkville, Victoria 3052
  • Tony J. Young Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Level 3 Daly Wing, 41 Victoria Parade, Fitzroy, Victoria 3065 Department of Surgery, University of Melbourne, Level 2 Clinical Sciences Building, St. Vincent’s Hospital Melbourne, 29 Regent Street, Fitzroy, Victoria 3065 http://orcid.org/0000-0001-9519-9195
  • Hans Gray Department of Mechanical Engineering, Melbourne School of Engineering, University of Melbourne, Grattan Street, Parkville, Victoria 3052
  • Shangyuanye Guan Department of Mechanical Engineering, Melbourne School of Engineering, University of Melbourne, Grattan Street, Parkville, Victoria 3052
  • Peter F. Choong Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Level 3 Daly Wing, 41 Victoria Parade, Fitzroy, Victoria 3065 Department of Surgery, University of Melbourne, Level 2 Clinical Sciences Building, St. Vincent’s Hospital Melbourne, 29 Regent Street, Fitzroy, Victoria 3065

DOI:

https://doi.org/10.18203/2349-3259.ijct20180129

Keywords:

Outcome, Knee prosthetic design, Osteoarthritis, Patient reported outcome measure

Abstract

Background: No randomised trial exists to assess the relative prosthetic performance of three fixed bearing total knee joint replacement construct designs through clinical functional outcomes and biomechanical gait analysis at six months after the index procedure.

Methods: The design of a double blinded, prospective, randomised trial with three parallel patient groups is presented.   Patients reviewed in consultant clinic with radiographic and clinical diagnosis of osteoarthritis of the knee, with the condition deemed severe enough to require a total knee joint replacement (TKJR) are eligible.  Subjects enrolled in the trial are randomised to one of the three TKJR construct designs approximately ten days prior to scheduled date of surgery.  Each subject is then followed up for at least twelve months.  Repeated measure of Analysis of Variance (ANOVA), and Analysis of Covariance (ANCOVA) will be utilised to uncover any clinical functional differences in each trial group in each time interval.

Results: Differences in clinical functional scores at each time interval compared to pre-intervention, as well as between group differences in clinical functional scores at each time interval will be examined.  At six months after the operation, biomechanical measurements of joint motion, ground reaction forces, and muscle electromyographic (EMG) activity will be recorded simultaneously from each subject for four test conditions: level walking, stair ascent, stair descent, and chair rise.

Conclusions: This randomised trial is designed to better understand the relationships between the clinical functional outcomes and replaced knee kinematics in three fixed bearing total knee replacement construct designs at six months postoperatively.

Author Biography

Tony J. Young, Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Level 3 Daly Wing, 41 Victoria Parade, Fitzroy, Victoria 3065 Department of Surgery, University of Melbourne, Level 2 Clinical Sciences Building, St. Vincent’s Hospital Melbourne, 29 Regent Street, Fitzroy, Victoria 3065

Fellow

Department of Orthopaedic Surgery

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Published

2018-01-23

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Original Research Articles