Triathlon cruciate retaining knee

RaTKAs were performed using the Mako robotic system (Stryker, Kalamazoo, MI), a semi-active robotic arm with haptic saw guidance. A preoperative CT scan helped to generate a three-dimensional (3D) bone model and individualized surgical plan, which was then used intraoperatively. A standard medial parapatellar approach was used for exposure and tracker and reference pins were placed in the tibia and distal femur for registration. The robotic arm was used for sequential bone cuts, and implants were trialed and evaluated using the navigation system before final implant (Stryker Triathlon Cruciate-retaining knee, Mahwah, NJ) placement.

Preoperative planning for conventional TKAs included standard multiplanar radiographs. The joint was exposed through a medial parapatellar approach with an intramedullary femoral guide for resecting the distal femur. The tibial cut was performed using an extramedullary guide. Flexion and extension gaps were then evaluated with spacer blocks and soft tissue releases were performed as necessary. Trial implants were inserted and evaluated for adequate balance before placement of final implants (Stryker Triathlon Cruciate-retaining knee, Kalamazoo, MI).