Surgical Outcomes of the Accelerometer-based Navigation System for Total Knee Arthroplasty

The KneeAlign 2 system (OrthAlign Inc, Aliso Viejo, California) is an accelerometer-based, portable navigation device for TKA that attempts to combine the alignment accuracy of large-console CAS systems, with the ease of use and convenience of conventional alignment methods. It is used to perform the proximal tibial and distal femoral resections in TKA. It consists of a disposable display console (2 × 4 × 2 inches in size) and a reference sensor, both of which are used for the tibial and femoral resections The display console and reference sensor each contains triaxial accelerometers that communicate wirelessly with one another. Briefly, the tibial jig has 2 primary components (a fixed component and a mobile component) connected by a proximal articulation .The fixed component, with the attached reference sensor, is first pinned to the tibia. The purpose of the fixed component is to account for the movement of the tibia during cutting block alignment.