The Cynthia knee endoprosthesis system offers the surgeon a variety of implant options depending on the soft tissue tension situation and the size of the bone defect. It is a system for many indications:osteoarthritis, rheumatoid arthritis and traumatic arthritis.
A sloped femoral box profile conserves bone without compromising fit or component strength.
Gradually reducing femoral radius provides a smooth transition throughout the gait cycle.
The narrow anterior flange is designed to provide an optimal fit for each patient while minimizing overhang and the opportunity for soft tissue irritation.
The trochlear angle varies by size to accommodate variable patient Q-angles.
A funnel shape allows the patient’s soft tissues to drive the position of the patella in extension and provides a smooth transition into the center of the groove.
Femoral lugs increase anti-rotational stability of femoral component.
A special cam-spine provides a large contact area and stability in flexion, while reducing the stresses to the tibia spine.
The patent central locking design provides the architecture for the system to optimize kinematics, while reducing backside micromotion to the lowest levels.