A Prospective Study to Evaluate the ConforMIS iTotal® (PS) Knee Replacement System

A Prospective Study to Evaluate the ConforMIS iTotal® (PS) Knee Replacement System

This is a prospective clinical study designed to observe the long-term clinical outcomes of total knee arthroplasty using a patient-specific, posterior stabilized implant in patients with osteoarthritis.

The study is prospective. Subjects will be implanted with an iTotal® PS Knee Replacement System. The study will include a minimum of 100 subjects across up to 10 sites. The patients enrolled in this study may represent the first cases of the iTotal PS KRS implanted at a particular site; data collected for the first 15 patients at each site will be analyzed separately from the rest of the enrolled population. This will provide visibility towards determining if there exists a learning curve in the implantation process of the iTotal PS KRS. The study sites will be located in the United States.

Inclusion Criteria:

• Clinical condition included in the approved Indications For Use for the iTotal® PS
• Osteoarthritis, as confirmed by the investigator's assessment of disease status at screening visit that warrants a TKR procedure. Disease status is assessed by Clinical and Radiographic assessment.
• Willingness to participate in the clinical study, to give informed consent, and to attend all follow-up visits
• > 18 years of age

Exclusion Criteria:

• Simultaneous bilateral procedure required
• BMI > 40
• Active malignancy (defined as a history of any invasive malignancy - except non- melanoma skin cancer), unless patient has been treated with curative intent and there have been no clinical signs or symptoms of the malignancy for at least 5 years
• Poorly controlled diabetes
• Neuromuscular conditions which prevent patient from participating in study activities
• Active local or systemic infection
• Immunocompromised
• Fibromyalgia or other general body pain related condition
• Rheumatoid arthritis or other forms of inflammatory joint disease
• Loss of bone or musculature, osteonecrosis, neuromuscular or vascular compromise in the area of the joint to be operated on, to an extent that the procedure is unjustified
• Diagnosed with or receiving treatment for Osteoporosis
• Other physical disability affecting the hips, spine, or contralateral knee
• Severe instability due to advanced loss of osteochondral structure
• Prior arthroplasty of the affected knee, including High Tibial Osteotomy (HTO)
• Unwilling or unable to comply with study requirements
• Participation in another clinical study which would confound results
• Allergy to any of the implant materials