Osteo Arthritis Knee
Conditions
Brief summary
Prospective evaluation of the safety and effectiveness of the MISHA Knee System. The study will collect data on the procedural and long-term adverse events, WOMAC pain and function scores, KSS satisfaction, subsequent surgical interventions, BMI levels, range of motion, UCLA activity level of the subjects, and perform radiographic/x-ray evaluations at clinical visits through 5 years post-procedure. The primary analysis of this study is freedom from device- and procedure-related SSIs at five (5) years post-implantation. This study will also assess device performance in subjects with intact and retained devices and subjects with devices removed prior to study termination and freedom from conversion to arthroplasty through 5 years. Study subjects will be followed over a five-year post-implant period.
Interventions
DEVICEMISHA Knee System
The MISHA Knee System is an extra-capsular knee implant intended to reduce loads on the medial knee. The implant consists of an absorber located between bases fixed with locking screws to the medial cortices of the distal femur and proximal tibia. The implant shares the load with the medial knee joint and articulating ball-and-sockets allow the device to accommodate the natural motions of the knee.
Sponsors
Moximed
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
25 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
Key Inclusion Criteria: 1. Subjects aged 25 to 65 years at time of index procedure 2. Body Mass Index (BMI) of \< 35 3. Activity exacerbated knee pain isolated to the medial compartment and not global in nature 4. WOMAC pain ≥ 40 5. Failed non-operative OA treatment Key
Exclusion criteria
1. Large medial osteophyte(s) or considerable extruded meniscus that may interfere with the placement or function of the device 2. Poor bone quality (e.g., bony erosion, osteopenia, osteoporosis) 3. Ligamentous instability 4. Active or recent knee infection 5. Inflammatory joint disease, including sequalae of viral infections 6. Suspected or documented allergy or hypersensitivity to cobalt, chromium, nickel or other metals 7. History of keloid, hypertrophic or contracture scaring 8. Propensity for restrictive scar formation or adhesions with prior procedures
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Freedom from device- and procedure-related Subsequent Surgical Interventions | 5 years post-implantation |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| WOMAC Pain | 5 years | Percent of subjects meeting clinically meaningful improvement (defined as ≥ 10-point change from baseline) Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) was used for evaluation of pain. The responses to each question are summed and the resultant scores are transformed to a 0-100 scale. A WOMAC score of zero (0) represents no knee problems and one hundred (100) represents extreme knee problems. |
| WOMAC Function | 5 years | Percent of subjects meeting clinically meaningful improvement (defined as ≥ 10-point change from baseline). Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) was used for evaluation of function. The responses to each question are summed and the resultant scores are transformed to a 0-100 scale. A WOMAC score of zero (0) represents no knee problems and one hundred (100) represents extreme knee problems. |
Countries
United States
Contacts
CONTACTRose Weinstein
PRINCIPAL_INVESTIGATORDennis Crawford, MD
Oregon Health and Science University
Outcome results
None listed