Columbus primary total knee replacement: a 2- to 4-year followup of the use of intraoperative navigation-derived data to predict pre and postoperative function.

The purpose of this study was to examine the clinical outcomes associated with the Columbus primary total knee replacement (B. Braun Aesculap, Tuttlingen, Germany), correlate these outcomes with variables measured intraoperatively with the OrthoPilot navigation system (B. Braun Aesculap), and explore the full potential of automating the process of intraoperative data collection. Clinical and functional outcomes at 2.5 years were similar to results reported in previous studies. Correlations were seen between initial mechanical axis deformity and postoperative range of motion as well as between final mechanical axis alignment and the presence of flexion contractures at later followup. It is now possible to potentially stratify particular segments of patients and develop specific intraoperative alignment targets that are most likely to yield positive clinical and functional outcomes.