Medial Pivot
- Intended to mimic normal knee kinematics in the absence of the ACL.
- May increase poly stresses by resisting ACL deficient pattern of motion.
Lateral Pivot
- “Mother Nature’s” solution for the ACL deficient knee
- Retain PCL
- Imposes least A/P constraint
- Optimized for “cruciate deficient” knee mechanics
Mobile Bearing
- Requires careful soft-tissue balance
- Technically demanding