This sub-study will be a single-arm, prospective, multi-center sub-study for continued evaluation of the safety and clinical effectiveness of Calypso Knee System using an additional measure of post-operative activity improvement.
Calypso Knee System Clinical Study, OUS for subjects with symptomatic osteoarthritis of the medial compartment of the knee. The sub-study will achieve continued evaluation of the safety and clinical effectiveness of the Calypso Knee System.