The Medacta GMK SpheriKA Post-Marketing Surveillance Study

Inclusion Criteria:

• Patients willing to sign the informed consent.
• Patients able to comply with follow-up requirements, including postoperativeweight-bearing restrictions and self-evaluations.
• Patients 18 - 80 years of age at the time of surgery.
• Patients requiring a primary total knee replacement (on label use).
• Patients with intact collateral ligaments.

Exclusion Criteria:

• Patients with inflammatory arthritis.
• Morbidly obese patients, with a body mass index (BMI) > 40.
• Patients with a history of total or unicompartmental reconstruction of the affectedjoint.
• Patients that have had a high tibial osteotomy or femoral osteotomy.
• Patients with neuromuscular or neurosensory deficiency, which would limit the abilityto assess the performance of the device.
• Patients with a systemic or metabolic disorder leading to progressive bonedeterioration.
• Patients that are immunologically compromised or receiving chronic steroids (> 30days).
• Patients whose bone stock is compromised due to disease or infection, unable toprovide adequate support and/or fixation to the prosthesis.
• Patients with an active or suspected latent infection in or surrounding the kneejoint.
• Pregnant or breastfeeding women.