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The MedalOne Total Knee System is indicated for use in knee arthroplasty in skeletally mature patients with the following conditions: noninflammatory degenerative joint disease including osteoarthritis, traumatic arthritis, or 1) avascular necrosis; - 2) inflammatory degenerative joint disease including rheumatoid arthritis; - 3) correction of functional deformity: revision procedures where other treatments or devices have failed: and treatment of fractures 4) that are unmanageable using other techniques. The MedalOne Total Knee System is for cemented use only.

The subject device, MedalOne Total Knee System, is intended for reduction or relief of pain and/or improved knee function. The subject device is a total knee replacement system composed of four different component types: MedalOne Femoral Component, MedalOne CS Tibial Insert, MedalOne Tibial Base and SoSuperior Patella. The subject system is based on, and substantially equivalent to, the predicate EVOLUTION® MP Total Knee System in terms of size availability, geometry, nominal dimensions, manufacturing tolerances, overall device processing steps, and materials of construction. The articulation adheres to the same "Medial-Pivot" philosophy as the predicate device. The femoral components are made from Cobalt Chrome alloy conforming to ISO 5832-4 and are offered in sizes 1-8 in left and right variants. The tibial inserts are made from standard UHMWPE conforming to ISO 5834-2 and are available in sizes 1-8 in standard and "extended" versions with thickness options of 10, 12, 14, 17, 20, and 24mm. The tibial bases are made from Cobalt Chrome alloy conforming to ISO 5832-4 and are available in 8 standard sizes and 3 plus sizes to permit 1-up/1-down size interchangeability. The patellas are made from UHMWPE conforming to ISO 5834-2 and are offered in a tri-peg design in 4 sizes: 26, 29, 32, and 35mm. The system is intended to be used with bone cement for fixation. The system also includes device-specific instrumentation to facilitate implantation of the subject devices. The instrument system includes new MedalOne instrumentation and is fully compatible with the predicate Evolution instrumentation.