- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02924961
Fluoroscopic and RSA Evaluation of the Triathlon Total Knee Prosthetic Design
March 5, 2018 updated by: R.G.H.H. Nelissen, Leiden University Medical Center
The goal of this study is to compare the fixed bearing (FB) Triathlon knee (Stryker, USA) and the mobile bearing (MB) Triathlon knee (Stryker, USA) and study the effect of implant design on kinematics and micromotion.
During two tasks the kinematics measured with fluoroscopy (kinematics and movement of the polyethylene bearing).
Roentgen Stereophotogrammetric Analysis (RSA) will be used to evaluate micromotion between prosthesis and the bone for the MB and FB Triathlon knee.
Study Overview
Status
Terminated
Detailed Description
The goal of this study is to perform a kinematic evaluation of a MB and FB knee prosthesis designs (Triathlon, Stryker, USA), by means of fluoroscopy and RSA and compare the different designs. The findings of this study will contribute to improve total knee designs and improve rehabilitation strategies.
Objectives:
- To evaluate if there is micromotion of the prosthesis with respect to the bone and if there is a different migration pattern between the designs.
- To assess and compare the in vivo kinematic patterns of the knee designs by means of fluoroscopy. This will be done on a subset of the patients (the first 20 patients able to perform step-up and lunge motions 6 months post-operatively in a controlled manner without the use of bars and walk more than 1 km)
- To evaluate if the polyethylene bearing in the mobile bearing is rotating and if this changes over time.
- Results of the RSA study will be used to correlate the kinematic parameters (fluoroscopy) with the migration results in order to identify factors of risk for the survival of total knee prostheses.
Study Type
Interventional
Enrollment (Actual)
48
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Leiden, Netherlands, 2300RC
- Department of Orthopaedics, Leiden University Medical Center
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (ADULT, OLDER_ADULT)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Patient (minimum age of 18 years old, no maximum age limit) is diagnosed with osteoarthritis or rheumatoid arthritis and requires primary arthroplasty.
- Patient is capable of giving informed consent and expressing a willingness to comply with this study
- Patient has no major deformities (i.e. sagittal and coronal deformities are less then 15 degrees)
- The ability to perform a lunge and step-up motion without the help of bars or a cane.
- No or slight pain during activity according to the Knee Society Pain Score
Exclusion Criteria:
- The patient is unable or unwilling to sign the Informed Consent specific to this study
- The individual has a functional impairment of any other lower extremity joint besides the operated knee
- Patient has a flexion contracture of 15° and more
- Patient has a varus/valgus contracture of 15° and more
- Patients requiring revision arthroplasty
- The patient does not understand the Dutch or English language good enough to participate.
- The use of walking aids
- The inability to walk more than 500 meters
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: SINGLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Triathlon Mobile-bearing
Primary total knee replacement with cemented Triathlon posterior stabilized mobile-bearing
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Other Names:
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Active Comparator: Triathlon Fixed-bearing
Primary total knee replacement with cemented Triathlon posterior stabilized fixed-bearing
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Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Migration, measured by means of RSA on the first 20 patients (fluoroscopy subset)
Time Frame: First or second day postoperatively, 6 months, 1 year
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Migration (MTPM in mm) of the prosthesis with respect to the host bone measured by means of roentgen stereophotogrammetric analysis (RSA)
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First or second day postoperatively, 6 months, 1 year
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Migration, measured by means of RSA
Time Frame: First or second day postoperatively, 6 months, 1 year and annually thereafter up to 20 years
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Migration (MTPM in mm) of the prosthesis with respect to the host bone measured by means of roentgen stereophotogrammetric analysis (RSA)
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First or second day postoperatively, 6 months, 1 year and annually thereafter up to 20 years
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Assessment of the knee flexion range by means of fluoroscopy during step-up motions
Time Frame: 6 months and 13 months postoperatively
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Patients will be asked to perform three step-up motions (height 18 cm) with bare feet in front of a flat panel fluoroscope.
Outcome measurement is knee flexion range (degrees).
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6 months and 13 months postoperatively
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Assessment of the axial rotation range of femoral component by means of fluoroscopy during step-up motions
Time Frame: 6 months and 13 months postoperatively
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Patients will be asked to perform three step-up motions (height 18 cm) with bare feet in front of a flat panel fluoroscope.
Outcome measurement is axial rotation range of femoral component (degrees).
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6 months and 13 months postoperatively
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Assessment of the knee flexion range by means of fluoroscopy during lunge motions
Time Frame: 6 months and 13 months postoperatively
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Patients will be asked to perform three lunge motions (height 18 cm) with bare feet in front of a flat panel fluoroscope.
Outcome measurement is knee flexion range (degrees).
|
6 months and 13 months postoperatively
|
Assessment of the axial rotation range of femoral component by means of fluoroscopy during lunge motions
Time Frame: 6 months and 13 months postoperatively
|
Patients will be asked to perform three lunge motions (height 18 cm) with bare feet in front of a flat panel fluoroscope.
Outcome measurement is axial rotation range of femoral component (degrees).
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6 months and 13 months postoperatively
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Investigation of clinical performance and patient outcome with the Knee Society Score (KSS)
Time Frame: Within 3 months prior to surgery, 6 months postoperatively, 1 year and and annually thereafter up to 20 years
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The Knee Society Clinical Rating System is comprised of two distinct sub-scores: one for pain, range of motion (ROM) and joint stability, and one for functional parameters.
Sub-scores range from a potential minimum score of 0 to a maximum score of 100 points.
Although the specific scores are not distinguished as "excellent," "good," "fair," or "poor," a higher value represents a better outcome.
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Within 3 months prior to surgery, 6 months postoperatively, 1 year and and annually thereafter up to 20 years
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: R.G.H.H. Nelissen, MD, PhD, Head of Department of Orthopaedics, Leiden University Medical Center
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
April 1, 2008
Primary Completion (Actual)
July 1, 2011
Study Completion (Actual)
February 1, 2016
Study Registration Dates
First Submitted
September 21, 2016
First Submitted That Met QC Criteria
October 3, 2016
First Posted (Estimate)
October 5, 2016
Study Record Updates
Last Update Posted (Actual)
March 7, 2018
Last Update Submitted That Met QC Criteria
March 5, 2018
Last Verified
March 1, 2018
More Information
Terms related to this study
Other Study ID Numbers
- P07.205
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
UNDECIDED
IPD Plan Description
IPD analysis is scheduled
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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