The Genutech® CCK revision knee system is a constrained system intended for patients with deficient prosthesis stabilization due to inadequate functioning of both the mediolateral and anteroposterior ligaments, as well as varus/valgus instability.
It is also indicated for major bone defects that may occur in combination with the existing instabilities. It is always used with cement in femoral components and tibial trays. In straight and offset stems, use without cement is recommended initially. Articular system characteristics: Femoral component – tibial insert:
- Maximum congruence to minimize stresses and reduce friction and wear. - The design of the condyles permits flexion up to 140º. - Maximum mobility restriction through the design of the tibial post and the CCK intercondylar box. This restriction will affect the external-internal rotation and the varus-valgus motion. - In a femorotibial joint replacement, there should always be congruency between the sizes of the femoral component and the insert. - The system is designed to perform mechanically under the more demanding requirements of a revision knee arthroplasty.
Femoral component – patella:
- The design of the femoral component’s patellar canal permits a smooth and anatomical motion for the patella throughout the range of flexion. - Maximum congruence to minimize stresses and reduce friction and wear.
Nonarticular system characteristics:
Tray – tibial insert:
- Total modularity among tray and tibial insert sizes.
- Triple fixation: •Anteroposterior clipping. •Anterior fixation bolt. •Metal reinforcement post that secures the insert on the tray, providing high stability and avoiding post breakage in the tibial insert.
- The system permits use of straight and offset stems to ensure greater stability in both the tibial and femoral zones. Augmentation blocks and supplements can also be added to cover any possible bone deficiency during the revision surgery. This will be applicable both for femoral components and CCK tibial trays.
- Its instrumentation was designed with two objectives: facilitating the surgeon’s work and minimizing patient risk.
The Genutech® knee system includes straight stems in order to provide additional stability in revision surgeries when required.
- Uncemented stems. - Diaphyseal grooves for better intramedullary vascularization, rotation control and minimization of rigidity. - Double fixation system for stems based on the fit between the “Morse Cones” of the stem and the component, as well as the installation of the compression screw.
The GENUTECH® knee system includes stems with 4.5-mm radius offset in order to provide additional stability in revision surgeries when needed, in which the position of the intramedullary axis does not correspond to the anteroposterior and mediolateral position of the tray/femoral component.
- Uncemented stems. - Diaphyseal grooves for better intramedullary vascularization, rotation control and minimization of rigidity. - Double fixation system for stems based on the fit between the “Morse Cones” of the stem and the component, as well as the installation of the compression screw. - Possible 360º spin, described with a radius of 4.5 mm, which provides greater stability and adaptability. Its use is intended for cases in which both the femoral and tibial component project with reference to the intramedullary axis, due to significant bone deficiencies.
The GENUTECH® CCK revision tibial insert is designed to restrict implant mobility due to bone and ligament instabilities that were found during a revision.
- A wider post wider reduces mobility in order to provide greater stability. - An internal metal reinforcement post is fixed in the tibial tray to improve its resistance. - Range of flexion of 140º.
- The post design is optimized to restrict: • External-internal rotation. • Varus-valgus motion.
- Joint geometry design with the maximum congruence to minimize stresses and thereby reduce friction and wear. - The insert incorporates a tibial slope angle of 7º, facilitating a neutral cut in the tibia. - Due to the anchor system, there is complete modularity among tray and tibial insert sizes. - Manufacture in Ultra High Molecular Weight Polyethylene (UHMWPE), with a composition of GUR 1020 in the compression moulding process, offers characteristics of high resistance and minimizes conditions of wear. - 4 sizes (8 thicknesses per size).
The GENUTECH ® system for primary knee arthroplasty has been designed by a distinguished group of experts in Orthopedic Surgery and Traumatology to provide a combination of optimum resistance, mobility, fixation and durability.