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Fixation Stability and Bony Healing Following Open Wedge High Tibial Osteotomy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00284596
Recruitment Status : Completed
First Posted : February 1, 2006
Last Update Posted : January 29, 2009
Information provided by:
Fowler Kennedy Sport Medicine Clinic

Brief Summary:

Patients undergoing opening wedge high tibial osteotomy (HTO) will be randomized to standard or locking screw fixation of the osteotomy plate. Tantalum beads will be implanted around the osteotomy site in all subjects to facilitate RSA imaging which will then allow micromotion at the osteotomy site to be quantified.

Primary Objectives and Hypothesis

  1. a)to determine fixation stability of the Puddu opening wedge osteotomy plate secured with non-locking compared to locking screws. We hypothesize that plate fixation with locking screws will result in a significant reduction of micromotion between tibial segments prior to bony healing compared to the non-locking screw fixation.

    b)To determine the progress of bony healing. We hypothesize that increased fixation stability in patients with locking screws will facilitate early bone healing reflected by smaller micromotion over time compared to the non-locking screw patients.

  2. a)If there is improved stability with the use of locking screws, rehabilitation protocols following opening wedge HTO will be modified accordingly. We hypothesize that decreasing micromotion will reach the detection limit of the RSA setup (0.4 mm) earlier in the locking screw group than in the non-locking screw group.

    b)To evaluate the effect of the osteotomy on proximal tibial anatomy. We hypothesize that an open-wedge procedure might increase rather than decrease the tibial slope.

Condition or disease Intervention/treatment Phase
Opening Wedge High Tibial Osteotomy Procedure: High tibial osteotomy Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 24 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Fixation Stability and Progress of Bony Healing Following Open-Wedge High- Tibial Osteotomy A 24-Subject Clinical Pilot Study Using Radio Stereometric Analysis
Study Start Date : February 2005
Actual Primary Completion Date : July 2007
Actual Study Completion Date : July 2007

Intervention Details:
  • Procedure: High tibial osteotomy
    Other Name: open wedge

Primary Outcome Measures :
  1. The primary outcomes are the fixation stability of the implant [ Time Frame: 2 years ]

Secondary Outcome Measures :
  1. Validated disease specific outcome measures [ Time Frame: 2 years ]

Information from the National Library of Medicine

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Ages Eligible for Study:   30 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • All patients between the ages of 30 and 70 years of age scheduled for HTO
  • Localized, activity-related knee pain· Varus alignment
  • Medial unicompartmental degenerative osteoarthritis
  • No significant patellofemoral symptoms
  • A ligamentously stable knee
  • Fixed flexion of <5°

Exclusion Criteria:

  • Advanced patellofemoral osteoarthritis
  • Osteoarthritic involvement of the lateral compartment
  • A decreased range of motion less than 90° and a flexion deformity that exceeds 10°
  • Knee ligament instability
  • Active drug or alcohol use or dependence that, in the opinion of the site investigator, that would interfere with adherence to study requirements
  • Serious illness (requiring systemic treatment and/or hospitalization) until subject either completes therapy or is clinically stable on therapy
  • Inability of patient to speak, read or understand English
  • Inability or unwillingness of subject or legal guardian/representative to give written informed consent.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00284596

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Canada, Ontario
Fowler Kennedy Sport Medicine Clinic, University of Western Ontario
London, Ontario, Canada, N6A 3K7
Sponsors and Collaborators
Fowler Kennedy Sport Medicine Clinic
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Principal Investigator: Robert Giffin, MD University of Western Ontario, Canada
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Responsible Party: Robert Giffin, FKSMC Identifier: NCT00284596    
Other Study ID Numbers: 10268
First Posted: February 1, 2006    Key Record Dates
Last Update Posted: January 29, 2009
Last Verified: January 2009
Keywords provided by Fowler Kennedy Sport Medicine Clinic:
Opening wedge high tibial osteotomy
Radio Sterometric Analysis
Locking screw fixation