Inter- and intra-surgeon variability in defining anatomical reference frames in navigated total knee surgery

摘要

Introduction: The original scope of surgical navigation is to provide surgical 'augmented reality ' in the operating room, by spatial tracking of the bone segments and of the surgical instruments, for a better visibility even in inaccessible areas, bone cut execution, positioning of the components, prediction of the effect of all these surgical actions. Ultimately, the scope is to improve final outcome [1]. In navigated surgery, and particularly in navigated total knee ar-throplasty (TKA), all these aspects depends on the definition of the anatomical reference planes and axes, obtained by identification and calibration of a series of anatomical landmarks. The aim of this work is too assess quantitatively the variability with which anatomical reference frames of the femur and tibia are defined. These actions are affected by considerable errors for suitable prosthesis component alignments in navigated TKA [2].