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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02589197
Other study ID # 15-LJK-001
Secondary ID
Status Completed
Phase
First received
Last updated
Start date July 13, 2016
Est. completion date September 30, 2022

Study information

Verified date November 2022
Source MicroPort Orthopedics Inc.
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

MicroPort Orthopedics (MPO) is conducting this study to build upon the results of a previous study which showed the Medial Pivot (MP) system required lower quadriceps activation than subjects implanted with a Posterior stabilized (PS) system preforming the same activities of daily living.


Description:

MicroPort Orthopedics (MPO) is conducting this study to build upon the results of a previous study which showed the Medial Pivot (MP) system required lower quadriceps activation than subjects implanted with a Posterior stabilized (PS) system preforming the same activities of daily living. The propose of the current study is to determine the impact of Total Knee Arthroplasty (TKA) design on muscle activation following TKA surgery.


Recruitment information / eligibility

Status Completed
Enrollment 50
Est. completion date September 30, 2022
Est. primary completion date September 2022
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 45 Years to 76 Years
Eligibility Inclusion Criteria: To be included in Groups 1 and 2, subjects must meet all of the following criteria: Subject is a candidate for unilateral primary TKA for degenerative or traumatic osteoarthritis Subject is a candidate to be implanted with the specified combination of components for either Group 1 or 2 Subjects are at least 45 years old and less than 76 years of age at time of enrollment Subject is willing and able to complete required study visits and assessments Subject plans to be available through the 1 year postoperative follow-up visit Subject is willing to sign the approved Informed Consent document To be included in Group 3, subjects must meet all of the following criteria: Subjects are at least 45 years old and less than 76 years of age at time of enrollment Subject is willing and able to complete required study visit and assessments Subject is willing to sign the approved Informed Consent document Exclusion Criteria: Subjects will be excluded if they meet any of the following criteria: Subject has both a body mass index (BMI) and waist circumference measurements greater than 35.0 kg/m2 and 102.0 cm respectively for men and 35.0 kg/m2 and 88.0 cm respectively for women at screening. Groups 1 & 2 Only: Subject has degenerative conditions (other than osteoarthritis in the enrolled TKA) impacting joints of the lower extremities, previous joint replacement of the enrolled knee or other lower limb joint replacement, or any other past or present condition, which in the opinion of the Investigator may impact gait. Group 3 Only: Subject has degenerative condition impacting joints of the lower extremities, any previous joint replacement in the knees, or any other past or present condition, which in the opinion of the Investigator may impact gait. Groups 1 and 2 Only: Subjects with a Kellgren-Lawrence Grading Scale of =2 on the contralateral knee if having severe pain or abnormal gait patterns. Subject is currently enrolled in another clinical investigation related to lower limbs which could affect the endpoints of this protocol. Subject is unwilling or unable to sign the Informed Consent document Subject has documented substance abuse issues Subject has an emotional or neurological condition that would pre-empt their ability or willingness to participate in the study Subject is currently incarcerated or has impending incarceration

Study Design


Related Conditions & MeSH terms


Intervention

Device:
Group 1 (Medial-Pivot)
EVOLUTION® Total Knee Arthroplasty Medial Pivot system with CS inserts
Group 2 (Posterior-Stabilized)
Zimmer® NexGen® Total Knee Arthroplasty system with PS inserts

Locations

Country Name City State
Canada The Ottawa Hospital Ottawa Ontario
Canada University of Ottawa Ottawa Ontario

Sponsors (3)

Lead Sponsor Collaborator
MicroPort Orthopedics Inc. The Ottawa Hospital, University of Ottawa

Country where clinical trial is conducted

Canada, 

Outcome

Type Measure Description Time frame Safety issue
Primary Lower Limb Muscle Activation Comparison as Assessed by Maximum Voluntary Isometric Contraction Muscle Strength and Dynamic Muscle Activation Measurements in Total Knee Arthroplasty Subjects Implanted with Medial-pivot or Posterior-stabilized Implants Measured by Dynamic Muscle Activation Measurements and Maximum Voluntary Isometric Contraction Muscle Strength and Activation Presurgery and 12 Months Post Surgery
Secondary Compare lower limb muscle activation between the control group (Group 3) and Groups 1 and 2, as assessed by maximum voluntary isometric contraction muscled strength and dynamic muscle activation measurements Measured by Dynamic Muscle Activation Measurements and Maximum Voluntary Isometric Contraction Muscle Strength and Activation Presurgery and 12 Months Post Surgery for implanted subjects
Secondary Compare functional outcomes for the Groups 1 and 2 as assessed by the Timed Up & Go (TUG) test Measured by Timed Up & Go (TUG) test Presurgery and 12 Months Post Surgery for implanted subjects
Secondary Compare functional outcomes for the Groups 1 and 2 as assessed by the KOOS Scores Measured by KOOS Scores Presurgery and 12 Months Post Surgery for implanted subjects
Secondary Compare subject satisfaction using a custom five question patient satisfaction questionnaire for Groups 1 and 2 Measured by Patient Satisfaction Survey 12 Months Post Surgery
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