Medacta GMK Sphere® Multicenter Post-Market Outcomes Study
United States260 participantsStarted 2015-06
Plain-language summary
This study is to average Forgotten Knee Score (FJS) of those patients receiving the Medacta GMK Sphere® knee at the two and five year time points. 70 subjects, enrolled at the data coordinating center in Medacta GMK Sphere® vs Posterior Stabilized study (WIRB Pro Num: 20141994) and randomized to the Sphere arm, will have their data utilized for this study.
Who can participate
Age range
21 Years – 80 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Patients willing to sign the informed consent
* Patients able to comply with follow-up requirements including postoperative weight bearing restrictions and self evaluations.
* Male and non-pregnant female patients ages 21 - 80 years of age at the time of surgery.
* Patients requiring a primary total knee replacement.
* Patients with a diagnosis of osteoarthritis (OA), traumatic arthritis (TA), or avascular necrosis (AVN).
* Patients with intact collateral ligaments.
Exclusion Criteria:
* Patients with inflammatory arthritis.
* Patients that are morbidly obese, body mass index (BMI) \> 40.
* Patients with a history of total or unicompartmental reconstruction of the affected joint.
* Patients that have had a high tibial osteotomy or femoral osteotomy.
* Patients with neuromuscular or neurosensory deficiency, which would limit the ability to assess the performance of the device.
* Patients with a systemic or metabolic disorder leading to progressive bone deterioration.
* Patients that are immunologically compromised, or receiving chronic steroids (\> 30 days).
* Patients bone stock is compromised by disease or infection, which cannot provide adequate support and/or fixation to the prosthesis.
* Patients with knee fusion to the affected joint.
* Patients with an active or suspected latent infection in or about the knee joint.
* Patients that are prisoners.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Evaluate the change in Forgotten Knee Scores (FJS) of those patients receiving the Medacta GMK Sphere from baseline to years 2 and 5 post-operatively.