“…Image‐free navigation technology has been validated in acquisition of coronal and sagittal mechanical alignment [43, 44, 47, 60]. In clinical studies, image‐free navigation has been used to determine position of components and limb alignment intra‐operatively, with these parameters being confirmed by post‐operative computed tomography (CT) scanning [9, 10, 15, 20, 29, 38, 39, 56, 58].…”