A Trial of Mechanical Axis vs Kinematic Alignment in Total Knee Replacement

The appropriate Stryker ShapeMatch® Cutting Guides will be used to guide the surgeons bone resections. The surgeon will implant the knee prostheses following the surgical protocol for Triathlon® Knee System with OtisMed® ShapeMatch® Technology

Stryker PrecisioN Knee (4.0) Navigation System, comprising of computer hardware and software and associated instrumentation, will be used for intra-operative alignment and orientation of implant. Navigation trackers will be secured to the femur and tibia and registration of the limb will be undertaken according to the PrecisioN Knee System surgical technique.Femoral and tibial resections, followed by device implantation, will be performed according to the Triathlon Knee System Surgical Protocol.

"Prosthetic components to be implanted including~* Triathlon® Cruciate Retaining (CR) Total Knee System (cemented), including Femoral Component and Primary Tibial Baseplate;~* Triathlon® Cruciate Substituting (CS) X3® polyethylene insert;~* Triathlon® X3 Patella (asymmetric) - treated selectively by surgeon."