Fig. 3From: The aiming device for cervical distractor pin insertion: a proof-of-concept, feasibility studySteps of Caspar pin insertion using the aiming device; Place the aiming device (A), Drilling (B), First Caspar pin insertion (C) and Second Caspar pin insertion (D). Lateral fluoroscopic view at C3-4 level (E), C4-5 level (F), C5-6 level (G) and C6-7 level (H) of the cervical spineBack to article page