System Options
The most important goal during the development of the EVOLUTION® Medial-Pivot Knee System was to preserve the ball-in-socket stability and medial-pivot kinematics offered in the ADVANCE® Medial-Pivot Knee System. While the EVOLUTION® Medial-Pivot Cruciate-Substituting (CS) option is directly related to ADVANCE® Medial-Pivot option, both the Posterior-Stabilized (PS) and Cruciate-Retaining (CR) options offer appeal to different surgeon preferences while maintaining stability and medial-pivot kinematics.
For those patients who can achieve high flexion, it is important that their abilities not be limited by their implant. The EVOLUTION® Medial-Pivot Knee System has been designed to achieve the following amount of flexion:
- 162° – Posterior-Stabilized
- 152° – Cruciate-Retaining
- 143° – Cruciate-Substituting
EVOLUTION® Posterior-Stabilized Knee
High-Flexion
The EVOLUTION® PS is designed to allow up to 162° of flexion
More Posterior Femur
Dwell point is more posterior on the insert than the ADVANCE® Knee
Thicker Posterior Condyles
Aid in maintaining the constant radius of the sagittal profile
Increased Tibial Slope Angle
All EVOLUTION® Knee tibial inserts feature 3° of built-in posterior slope
EVOLUTION® Cruciate-Substituting/Cruciate-Retaining Knee
High-Flexion
The EVOLUTION® Medial-Pivot Knee System has been tested up to the following max theoretical flexion:
- CR: 152°
- CS: 143°
Differentiating feature of the EVOLUTION® Medial-Pivot Knee System
Medial ball-in-socket mechanism to prevent anterior translation and keep the femur more posterior throughout flexion
Increased Tibial Slope Angle
All EVOLUTION® Knee tibial inserts feature 3° of built-in posterior slope
Higher flexion in post-operative TKA patients has been correlated with the patients’ perception that their knee is more like a normal knee and they are more likely to feel they have achieved their pre-operative expectations.15
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