PSA™ Revision Knee







Femoral Component
● Colbalt-Chromium alloy
● 6 sizes (left/right)
● Cemented design
● Compatible with tibial inserts of all sizes
● Locking screw for securing the extension stem

 


Tibial Insert

● UHMWPE
● 6 sizes and 8 thicknesses
● Built-in reinforcement bushing for extra structural support
● Screw fixation to increase the insert stability


 


Tibial Baseplate
● Titanium alloy (Ti-6Al-4V)
● 6 sizes
● Fully capture design to minimize micro-movement





Tibial Augment

● Titanium alloy (Ti-6Al-4V)
● 6 sizes and 3 thicknesses (5,10 and 15 mm)
● Screw-fixation





Extension Cementless Stem (Straight and Curved)

● Titanium alloy (Ti-6Al-4V)
● 5 lengths of straight stem
     Short stem – 30 mm in length with 14 mm diameter
     Long stem – 75, 100, 150 and 200 mm in length and comes in 5 diameters
● Curved stem – 150 and 200 mm in length and comes in 5 diameters
● Grooves/open-slot are applied to maintain flexibility





Femoral Augment (Posterior and Distal)

● Cobalt-Chromimum alloy
● Posterior augment – 6 sizes and 2 thicknesses (4, 8 mm)
● Distal augment – 6 sizes and 4 thicknesses (4, 8, 12 and 16 mm)
● Screw fixation





Offset Adaptor

● Titanium alloy (Ti-6Al-4V)
● 2, 4, and 6 mm offset
● Fits both femoral and tibial components
● Full-range orientation for both femoral and tibial alignment





More Constraints Provide More Stability for Revision
● Maximum Range of Motion (ROM) from 129 degrees to 134 degrees



● Post and Cam early engaged for stability
● Higher jumping distance for better security



● Confined Internal/External (I/E) Rotation to 3.7 degrees to emulate natural kinematics
● Restricted varus/valgus lift-off angles to 1.4 degrees to increase stability



●Curve-on-Curve design provides better constraint and increases contact surface area to reduce wear





Features of the U2 PSA Revision Knee System

Femoral Locking Screw secures extension taper with a built-in C ring to prevent the screw from backing out.



Built-in reinforcement bushing and locking screw within the tibial insert extends into the baseplate to provide additional structural support and to against shearing force from the femur. (Patent No. US9044327)





U2 PSA Revision Knee System is Compatible with
U2 Primary Knee System





Surgical Protocol  Brochure