Fig. 5

a Placement of microendoscope at the left side and navigation of the referential array in the right iliac crest placement. Resection using a high-speed drill. b Intraoperative microendoscopic image. Resection of pseudoarticulation using a high-speed drill. c Checking the depth and progress status of excavation (real-time images are shown in d). d Intraoperative three-dimensional navigation images