Clinical Study Evaluating the Outcomes of a New Knee System With a Physiological Rollback Mechanism

Study Overview
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Brief Summary
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The aim of this study is to assess the clinical, radiographic and patient-reported outcome measures (PROMs) after total knee replacement with Physica KR, define the survivorship of the implants and identify possible risk factors that may lead to failure.

Official Title
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A Multicentre, Prospective Clinical Study Evaluating the Outcomes of a New Knee System With a Physiological Rollback Mechanism

Conditions
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Primary Total Knee Replacement

Intervention / Treatment
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* Device: Physica KR


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male and females Age 22-80 years Any race Ambulatory patients Patients who have a medical condition with over 5 years of life expectancy Patients requiring knee prosthesis, suitable for the use of Physica KR Patients with painful primary knee osteoarthritis Patients with painful secondary knee osteoarthritis Patients who are suffering from inflammatory arthritis (e.g. rheumatoid arthritis) Patients who have undamaged and functional collateral and posterior cruciate ligaments Patients with a flexion greater than or equal to 90° on the affected side Patients with a fixed flexion contracture less than 10° Patients who understand the conditions of the study and are willing and able to comply with the prescribed rehabilitation and to perform all scheduled follow-up visits Patients who have signed the Ethics Committee approved study-specific Informed Consent Form prior to the surgery Exclusion Criteria: Obese patients with BMI above 35 kg/m2 (severe obesity) Previous partial knee replacement (unilateral, bicompartimental or patellofemoral joint replacement), patellectomy, high tibial osteotomy or femoral osteotomy in the affected knee Primary Total Knee Replacement (TKR) in the affected knee Varus or Valgus deformity greater than 20° Patients with a fixed flexion contracture greater than 10° Previous knee replacement on the contralateral side within the last year and whose outcome is achieving an KSS< 70 points Patients with symptomatic OA of the hips, spine, ankles, if it can interfere with the evaluation of the target knee Patients with active or any suspected infection (on the affected knee or systemic) Muscular insufficiency or absence of muscoligamentous supporting structures required for adequate soft tissue balance Patients with known or suspicious metal hypersensitivity Recurrent medical history of severe allergic or immune-mediated reactions Vascular insufficiency of lower limbs severe enough to interfere with the study evaluation Current treatment or treatment within the previous 2 years before the screening visit for malignant and life-threatening non-malignant disorders Any clinically significant pathology based on clinical history that the Investigator feels may affect the study evaluation Any intercurrent chronic disease or condition that may interfere with the completion of the 5-year follow-up, such as liver disease, severe coronary disease, alcohol or drug abuse, disordered mental state, or other clinically significant condition Patients who have significant neurological or musculoskeletal disorders or disease that may adversely affect gait and compromise functional recovery and evaluation Patients who have neuromuscular or neurosensory deficit which would limit the ability to assess the performance of the device Patients with systemic or metabolic disorders leading to progressive bone deterioration Patients who have a medical condition with less 5 years of life expectancy Previous organ transplant surgery Any psychiatric illness that would prevent comprehension of the details and nature of the study Participation in any experimental drug/device study within the 6 months prior to the screening visit Female patients who are pregnant, nursing, or planning a pregnancy

Ages Eligible for Study
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Minimum Age: 22 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Physica KR<br> | Device: Physica KR<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Knee Society Clinical Rating System (KSS) |  | From baseline to 5 year follow up | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Knee injury and Osteoarthritis Outcome Score (KOOS) |  | From baseline to 5 year follow-up | 
| Oxford Knee Score (OKS) |  | From baseline to 5 year follow-up | 
| Satisfaction Visual Analogue Scale (VAS) |  | From baseline to 5 year follow-up | 
| Survival rate of the implant |  | at 3 and 5 year follow-up | 
| Incidence of AE/SAE, ADE/SADE |  | From baseline to 5 year follow-up | 
| Forgotten Joint score (FJS) |  | From baseline to 5 year follow-up |