Fig. 7A–B.

(A) A screenshot image of the Kolibri CAS system shows verification of accuracy after the morphing protocol. The verification of virtual anatomy accuracy of the CAS model is determined with use of the infrared sensor tool. This is the experimental set-up number 5 of pistol-grip deformity; the verification shows a model accuracy of 0.5 mm. (B) A screenshot image of the Kolibri CAS system after the insertion of the guide wire is shown. The screen shows (1) the CCD angle value of the wire; (2) the angle of wire version in comparison to the “neutral” angle calculated by the CAS algorithm as the angle between the frontal plane (defined by center of the femoral head, center of the femoral neck base lateral, and the midpoint between the two femoral epicondyles) and the lateral plane (defined by the intercondylar line and the axis of the femoral shaft); (3) the superimposed shape of the resurfacing implant; (4) the data depicted in mm represent the deviation of the positioned wire from the “suggested” position calculated by the CAS algorithm.