Combined femoral and tibial component total knee arthroplasty device rotation measurement is reliable and predicts clinical outcome.

Background: The optimal total knee arthroplasty (TKA) rotational alignment and how best to obtain and measure it are debatable. The aim was to analyse the reliability of the Berger femoral, three different tibial and four different combined two-dimensional computer tomography (2D-CT) TKA component rotation measurements, and to ascertain which rotational values best predict a successful clinical outcome.

Methods: The 2D-CT scans were obtained post-operatively on 60 patients who had TKA.