Arthropathy of Knee Joint, Knee Disease, Knee Osteoarthritis, Knee Pain Chronic, Osteoarthritis, Knee, Osteoarthritis Knee Left, Osteoarthritis Knee Right, Osteoarthritis Knees Both
Conditions
Keywords
Total Knee Arthroplasty, Total Knee Replacement
Brief summary
Patients with degenerative joint disease can effectively be treated with a primary total knee replacement to reduce pain and improve function in their daily lives. Theoretically, achievement of normal knee motion using a medial pivot design in total knee replacements can be recreated in comparison to single radius designs, which could lead to an improvement in post-surgical outcomes and satisfaction with the procedure. The aim of this study is to compare two types of implant designs (medial pivot and single radius) in a total knee replacement using clinical outcomes, patient reported outcomes, and overall function assessed by a specialized gait laboratory.
Detailed description
This is a single center, cohort study in 100 adult subjects undergoing primary total knee arthroplasty that will receive one of the two total knee device systems. Primary total knee replacement is an effective treatment for relieving pain and improving function for patients with degenerative joint disease. Recently, design of knee implants in a total knee replacement have received increased interest, particularly the medial pivot designs. Single-radius implants are designed to minimize instability throughout the functional range of movement. Medial pivot total knee designs theoretically recreate more normal knee motion when compared to single radius designs. Both implant designs are commonly used for total knee replacements. Outcomes of TKA are evaluated by multiple methods including implant/device survivorship, radiographic assessments, clinical examinations, and patient reported outcome measures (PROMS). Laboratory based gait analysis performed at a specialized research facility is not commonly conducted in patients with positive outcomes post-surgery as this is associated with high cost. There is currently not enough research comparing these two designs directly. Research is required to determine which design may provide better clinical outcomes and satisfaction with the procedure. In addition to your normal standard clinical care, there will be scheduled pre-operative, operative, 6-week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visits.
Interventions
DEVICEMicroPort Evolution Medial-Pivot Knee System (Cruciate-substituting)
Medial Pivot Knee System
DEVICEStryker Triathlon Tritanium Knee System (Condylar Stabilizing)
Single Radius Design Total Knee System
Sponsors
Rubin Institute for Advanced Orthopedics
MicroPort Orthopedics Inc.
LifeBridge Health
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
* Subject is male or non-pregnant female aged between 18 and 75 years of age. * Subject is willing to provide informed consent to participate in the research study. * Subject is indicated for a primary total knee arthroplasty (TKA) based on the approved labeling of knee implant, either a medial pivot or single radius design, specifically: MicroPort Evolution Medial-Pivot Knee System, Cruciate Retaining (CS) or Stryker Triathlon Tritanium (CS) * Subject does not have a history of previous prosthetic replacement device on the operative knee. * Subject is currently ambulating and does not have a condition on the contralateral limb in the opinion of the investigator that would interfere with the gait laboratory evaluations. * Subject is willing and able to comply with the schedule of events for the study and is available to return to the clinic for all required follow-up visits.
Exclusion criteria
* Subject has a Body Mass Index (BMI) \>40 * Subject has a diagnosis of avascular necrosis or inflammatory arthritis. * Subject has any mental or neuromuscular disorder that would create an unacceptable risk of prosthesis instability, prosthesis fixation failure, or complications in postoperative care. * Subject is a prisoner * Subject has any condition, in the opinion of the Investigator that might interfere with the evaluation of the study objectives.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Quadriceps Muscle Strength | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured (in lbs/in) using a dynamometer for quadricep muscle strength assessment. |
| Change in Initial Peak Loading Force | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured (in N) and analyzed using the KneeKG system during normal walking. |
| Change in Active and Passive Range of Motion | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | Active and passive range of motion will be measured (in degrees) using a goniometer. |
| Change in Quadriceps Lag | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | Quadriceps lag will be measured (in degrees) in both the sitting and supine positions. |
| Change in Timed up and Go Test (TUG) | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured in seconds and requires a patient to rise from a chair walk three meters and return to the chair again as quickly as possible. |
| Change in Five Times Sit to Stand Test | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured in seconds and will collect the amount of time it takes a patient to transfer from a seated to a standing position and back to sitting five times. |
| Change in Single Limb Stance Test for Both Knees | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured in seconds and will collect the amount of time a patient is able to stand unassisted on one leg. |
| Change in Timed Ascent and Descent of One Flight of Stairs Test | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured in seconds and will collect the amount of time it takes a patient to ascend and descend one flight of stairs (8-14 steps). |
| Change in Knee Mechanics | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | Knee flexion/extension, varus/valgus, and internal/external rotation will be measured (in degrees) and analyzed using the KneeKG system during incline and decline walking. |
| Change in Anterior/Posterior Knee Translation | Pre-operative; Post-operative - 3 month and 12 month follow-up visit | This parameter will be measured (in mm) and analyzed using the KneeKG system during incline and decline walking. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Post-surgical Complications | Operative visit; Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | All complications related to the procedure will be documented. |
| Evidence of Osteolysis | Pre-operative; Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | X-rays will be evaluated to look for presence of a radiolucent area, especially \> 2mm, around implant or cement with sclerotic border. |
| Change in Knee Society Score (KSS) Short Form | Pre-operative; Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | 25 question items assessing symptoms, patient satisfaction, patient expectation, and their level of functional activity of their knee. Scores range from 0-100 with higher scores representing better outcomes. |
| Change in Knee Injury and Osteoarthritis Outcome Score (KOOS) | Pre-operative; Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | 42 question items assessing a patient's opinion about their health, symptoms, and function of their knee. Scores range from 0-100 with zero representing severe knee problems and 100 indicating no knee problems. |
| Change in Patient Reported Outcomes Measurement Information System (PROMIS-10) | Pre-operative; Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | 10 question items assessing overall physical, mental, and social health of the patient. Each question item is scored separately on 1-5 scale and total scores are combined into 2 groups - Global Physical Health Score and Global Mental Health score. A T-score is calculated with the 2 previous scores against the general population with a higher T-score representing better outcomes. |
| Change in Forgotten Joint Score FJS | Pre-operative; Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | 12 question items evaluating how aware a patient is of their operative joint during daily activities. Scores range between 0-100 with higher scores indicating a patient is able to forget the joint on a daily basis or low joint awareness. |
| Implant Survivorship | Post-operative - 6 week, 6 month, 12 month, 24 month, 36 month, and 60 month follow-up visit | Radiographic assessment using AP and lateral knee X-rays to analyze implant position, radiolucencies, fracture, and osteolysis. |
Countries
United States
Contacts
Primary ContactMartin Gesheff
Backup ContactNirav Patel
Outcome results
None listed