Natural-Knee II Modular CoCr Cemented Baseplate

The Natural-Knee II modular CoCr cemented tibial baseplate is made from cast cobalt chrome and is designed to optimally address the issues and challenges of a cemented baseplate procedure.  The baseplate complements the existing family of baseplates and can be used with primary, revision and CRK (constrained) femoral components as well as all Natural-Knee II tibial insert configurations.

Design Rationale

• Asymmetric design matches the proximal tibia and avoids soft tissue impingement and implant subsidence
• Instruments afford predictable, reproducible results; surgical technique is consistent with the existing system
• Outer periphery surface finish of the tibial tray prevents cement adhesion, thus reducing cleanup time
• Inside surface of the tibial tray has a smooth finish to reduce the potential for backside wear
• Reduced boss diameter and thin keel fins are bone-conserving
• Baseplate, distal plug and stem/plug screw are made of cobalt chrome to reduce the potential problems associated with combining dissimilar metals
• Stem/plug screw is "self-captured" to prevent disassembly from the baseplate
• 1-mm deep cement pockets have a roughened surface for optimal cement adhesion
• No "through-holes" design eliminates a pathway for cement debris