NexGen® Complete Knee Solution Legacy® Knee Posterior Stabilized (LPS)
The NexGen Legacy LPS Femoral Component is intended for patients who, in the surgeon's judgement, have adequate bone stock and varus/valgus stability, and/or when the surgeon elects to substitute for the posterior cruciate ligament. Fixation options include porous fiber metal, PMMA precoat and non-coated versions. These devices are for cemented use only.
Dished Articulation
In the frontal plane, the femoral condyles have a smaller radius of curvature compared to the CR/CRA components. This dished articulation provides a large contact area on the loaded condyle, even in up to 7 degrees of varus/valgus lift-off, without edge loading.
Distinctive Net-Shape Compression-molded Polyethylene
Micro-Finish™ Surface Finish smoothness and reproducible dimensional consistency result from this manufacturing process. Polyethylene with no added calcium stearate, gamma irradiated in an inert nitrogen environment, helps to minimize oxidation and maintain the material's durability on abrasion resistance.
Tibofemoral Conformity
The 1.07-1.0 ratio of articulating radii, a NexGen System feature, provides for a high degree of conformity in the frontal plane, thereby increasing contact area and better distributing and reducing contact stresses.
Cam/spine Mechanism
After the cam/spine mechanism engages, the contact point moves down the spine as flexion increases. This reduces the moment arm of the load on the spine and significantly improves resistance to tibiofemoral subluxation, especially at higher flexion angles when dislocation is most likely to occur.
Size Interchangeability
A broad range of femoral component sizes are capable of mating with at least four, and in some cases six tibial sizes. This helps to optimize patient fit and kinematic function.
Deeper Patellar Groove
The enhanced trochlear recess provides for a deeper patellar groove, which helps to improve patellofemoral contact. Compressive stress or pressure on the patella is reduced, helping to reduce forces which can lead to wear. This creates a smooth transition from flexion to extension.
Please refer to the package inserts for complete product information, including contraindications, warnings, precautions, and adverse effects.
