Fig. 6From: Computer-assisted femoral head reduction osteotomies: an approach for anatomic reconstruction of severely deformed Legg-Calvé-Perthes hips. A pilot study of six patientsThe proposed PSI design for the navigation of FHRO. a The PSI contains two cutting slits for guiding the blade of the surgical saw and two drill sleeves for temporary fixation of the PSI with surgical pins. b The undersurface of the PSI is shaped as a negative of the patient’s bone surfaceBack to article page