U2 Knee System
The U2 Knee™ System is available in a wide range of sizes, offering uncompromising intraoperative flexibility and full interchangeability of femoral, tibial and patellar components.
Among the major features of the U2 Knee design are:
• A science-based size range for improved implant fit and associated capsular/soft tissue interactions
• An interchangeable round-on-round femorotibial articulation for enhanced load distributions
and improve wear characteristics
• High Compression Molded UHMWPE for enhanced wear performance
• A refined PS Progressive Rollback Post and Cam mechanism to provide more effective anatomic
rollback behaviour for improved ROM potentials
• An improved Post and Cam jumping distance to reduce dislocation potential
• An increased posterior condylar lobe thickness to provide important curvature continuation to
encourage ROM and minimize bone/implant impingement potentials in deep flexion
• A multi radius femoral component curvature to encourage physiologic ligament tension relationships
The PS (posterior stabilized) and CR (curciate retaining) femoral components have the same design features, including 2 mm A/P and M/L increments, extended patella groove, and consistent intercondylar width.
The extended patella groove is designed with increased contact area between the patella and femoral implants to allow for optimal patella tracking.
The PS (posterior stabilized) and CR (cruciate retaining) femoral components have the same design features, including 2 mm A/P and M/L increments, extended patella groove, and consistent intercondylar width.
Consistent condylar curvature and standard intercondylar box width (in PS knee) allows full interchangeability between femoral and tibial components.
Smaller intercondylar bone removal together with rounded corners help avoid the risk of intercondylar fracture for PS box preparation.
|CM monobloc||CMA modular||modular non-cemented|
|30 mm length||5 mm and 10 mm thickness|
Extraordinary Wear Performance
E-XPE insert shows 60% reduction in gravimetric wear compared to XPE after accelerated aging
Enhanced Mechanical Strength
Heat treatment is not required after cross- linking process. Therefore, E-XPE shows a 20% tensile strength improvement as compared to highly cross-linked polyethylene
Superior Oxidative Stability
Surface oxidative index of E-XPE shows significant low oxidation after in vitro accelerated aging test