Multi-Center Study to Evaluate the ConforMIS iUni Knee Implant

The iUni G2 Unicompartmental Resurfacing Device (iUni) is an FDA cleared and CE Marked implant designed for patients with damage isolated to either the medial or lateral tibiofemoral compartment of the knee. The study subjects will be followed for 10 years post implant. The study objective is to evaluate the safety and performance of the ConforMIS iUni® Unicompartmental Knee Resurfacing Device in patients with single compartment osteoarthritis. The iUni is a patient-specific unicompartmental resurfacing device designed from the patient's unique anatomy using proprietary software which interprets data from the patient's CT scan. The patient matched implant design is then coupled with unique patient-matched disposable instrumentation designed using the same CT data and software. The follow-up visit schedule will include visits at 6 weeks, 6 months (optional), 1 year, 2 years, 5 years and 10 years post implant.The remaining follow-up data collected at years 3, 4, 6, 7, 8, and 9 may be collected via phone call/email and does not require a subject visit to the site.The study sites will be located in the United States.