This is an early user evaluation of the robotic-assisted total knee arthroplasty platform. The objective of this surgeon group is to capture data on the defined objectives and provide Stryker with feedback.

Inclusion Criteria:

• Patient requires primary total knee surgery
• Patient is willing and able to comply with postoperative follow-up requirements and self evaluations
• Patient is willing to sign an IRB approved informed consent
• Patient is at least 18 years of age

Exclusion Criteria:

• Patient has a BMI > 50
• Patient is skeletally immature
• Patient has an active infection or suspected infection in or about the joint
• Bone stock that is inadequate to support fixation of the prosthesis
• Neuromuscular disorders, muscular atrophy or vascular deficiency in the affected limb rendering the procedure unjustified.
• Patients with mental or neurological conditions which may be incapable of following instructions.
• Blood supply limitations
• Collateral ligament insufficiency.
• Patients with prior HTOs or Unis.