Fig. 1

Placement of Screw I. a The 3D model was adjusted to identify the largest ellipse-like translucent area. b A virtual screw was placed in the translucent area. c, d The position of Screw I was validated in the opaque 3D model
Placement of Screw I. a The 3D model was adjusted to identify the largest ellipse-like translucent area. b A virtual screw was placed in the translucent area. c, d The position of Screw I was validated in the opaque 3D model