- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02949336
Kinematics Analysis of SIGMA® Partial Knee System (UKA)
Kinematics Analysis: Traditional (ACL Retaining) and ACL Deficient (Reduced Tibial Slope) Medial, Fixed Bearing Primary Unicondylar Knee Arthroplasty With the SIGMA® High Performance Partial Knee System
The proposed study is a prospective collection of health related personal data (observational study). A total of approximately 10 subjects with traditional medial SIGMA® High Performance Partial Knee System and 10 ACL deficient subjects with medial SIGMA® High Performance Partial Knee System are analyzed during sitting onto a chair and getting up, deep knee bend, stance and swing phase of level walking, downhill walking (ramp descent) and stair descent at least 12 months post-operatively, in terms of 3D fluoroscopic assessed tibio-femoral motion as well as simultaneous skin marker assessed whole leg motion and ground reaction forces. All the video-fluoroscopic testing is performed at the Institute for Biomechanics at the ETH Zurich. The UKA subjects are recruited based on the inclusion and exclusion criteria.
The primary objective is to quantify and describe the three-dimensional kinematics for patients with a traditional medial SIGMA® High Performance Partial Knee System (functional ACL and tibial posterior slope matching the native bone) during these daily activities.
The secondary objective is to evaluate patients with the same medial UKA implant (SIGMA® High Performance Partial Knee System) in an ACL deficient knee, where the UKA was implanted at a 50% reduced tibial posterior slope relative to the native knee.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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ZH
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Zurich, ZH, Switzerland, 8093
- Institute for Biomechanics, ETH Zürich
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion criteria (group 1):
- medial SIGMA® High Performance Partial Knee System due to medial OA
- Intact/functional ACL
- BMI ≤ 32
- good clinical outcome, KOOS >70
- no or very low pain VAS < 2
- Follow-up at least one year post-op
- Standardized general health survey score (SF-12) within the normal range for people in their age group
- Age ≥ 18 years
Exclusion criteria (group 1):
- Actual significant problem on lower extremities
- Misaligned UKA
- Deficient / non-functional ACL (Lachman Test)
- Any other arthroplasty at the lower extremities
- Patient incapable to understand and sign informed consent
- Incapable of performing the motion tasks
- Pregnancy
Inclusion criteria (group 2):
- medial SIGMA® High Performance Partial Knee System due to medial OA
- Deficient / non-functional ACL
- Central to posterior wear of medial tibial plateau (pre-op MRI)
- 50% reduced tibial posterior slope after UKA (post-op radiograph)
- BMI ≤ 32
- good clinical outcome, KOOS >70
- no or very low pain VAS < 2
- Follow-up at least one year post-op
- Standardized general health survey score (SF-12) within the normal range for people in their age group
- Age ≥ 18 years
Exclusion criteria (group 2):
- Actual significant problem on lower extremities
- Misaligned UKA / non-reduced posterior tibial slope (post-op radiograph)
- Intact / functional ACL
- Any other arthroplasty at the lower extremities
- Patient incapable to understand and sign informed consent
- Incapable of performing the motion tasks
- Pregnancy
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Group 1: Traditional UKA
Patients with a traditional Medial Unicompartmental Knee Arthroplasty, SIGMA® High Performance Partial Knee System (functional ACL and tibial posterior slope matching the native bone) will undergo observational use of fluoroscopy to analyze joint kinematics
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Minimal radiation exposure (0.17 mSv) for observational purpose
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Group 2: ACL deficient UKA
Patients with the same medial UKA implant (SIGMA® High Performance Partial Knee System) in an ACL deficient knee, where the UKA was implanted at a 50% reduced tibial posterior slope relative to the native knee will undergo observational use of fluoroscopy to analyze joint kinematics.
|
Minimal radiation exposure (0.17 mSv) for observational purpose
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Knee Kinematics
Time Frame: 3 hours
|
The primary outcome of this study is the relationship between the knee flexion angle and the medial and lateral anterior-posterior translation of the condyles during sitting onto a chair and getting up, deep knee bend, stance and swing phase of level walking, downhill walking (ramp descent) and stair descent.
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3 hours
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Collaborators and Investigators
Sponsor
Investigators
- Study Director: Stephen Ferguson, Prof. Dr., Institute for Biomechanics, ETH Zürich
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- UKA V 2.4 02.09.2016
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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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