MC2

• Protecting the polyethylene from wear
• Reducing stress at the interfaces
• Optimising knee function by reproducing the physiological movement of the femur in relation to the tibia (roll-back)
• Controlling posterior drawer and facilitating extensor system leverage
• Guaranteeing increased flexion amplitude

Details:

• High congruence between 0 and 60° flexion on the 2 coils.
• The posterior stabilisation system does not come into play during walking, thus reducing the level of anterior-posterior stress.
• The posterior-stabilised cam mechanism comes into play from 60° flexion, offering surface contact in addition to that of the coils.
• Intrinsic flexion amplitude exceeds 130°.

Femoral component:

• Produced from a casting process in which the cobalt chromium is honed and highly polished.
• Comes in 5 right-left sizes, cemented or with dual coating: High porosity titanium and hydroxyapatite.
• The trochlea is wide and deep and continued as distally as possible.
• The anterior cutting angle insures a cut without stair gait.
• The posterior cut, non orthogonal to the distal cut, releases the posterior part of the condyles to encourage proper flexion amplitude and offers, in combination with the anterior cut, excellent primary stability of the implant (press-fit effect).
• The space requirement of the posterior stabilising chamber has been optimised for minimum bone reduction, and to enable retrograde centromedullary locked nailing in the event of supracondylar fracture.
• Recessing of the condyles reduces mass by 30%.

Mobile bearing

• Made of ultra high molecular weight polyethylene (UHMWPE) and vacuum-packed.
• Available in 5 sizes and 4 thicknesses.
• Its size has been studied to enable maximum rotation without overlapping of the tibial tray.
• To the front, it has been largely indented to avoid all contact with the patella tendon or the tip of the patella.
• The cylindrical conical rotation rivet stabilises the plateau in the event of lift-off and prevents movements encouraging wear and creep.
• In contact with the femoral component, the posterior-stabilised cam ensures physiological kinematics repeating roll-back and enabling hyperflexion.

The junction between the cam and the bearing surfaces prevents rough joins which may generate abnormal wear. The size of the bearing must be identical to that of the femoral component.

Tibial tray

• Made of the same material and manufacturing process as the femoral component, friction characteristics are improved by the honed and highly polished surfaces in contact with the polyethylene bearing.
• Designed to fit the tibial cut without having to use a right or left component.
• Comes in 5 sizes, cemented or with dual coating: High porosity titanium and hydroxyapatite.
• The thickness of the tray has been optimised using a keel with two fins serving as prop.
• The conical profile of the keel is suitable for drilling and sinking.
• The keel is recessed at the centre to accommodate the polyethylene bearing rotation rivet.
• The choice of tray size does not depend on the size of the femoral component.

Patella component

• Made of ultra high molecular weight polyethylene (UHMWPE) and vacuum-packed.
• Comes in 5 sizes, cemented.
• Its part-sphere design cut according to an oval contour enables better adjustment to the edge of the patella section.
• Comes with two sealing rivets.