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  Indian J Med Microbiol
 

Figure 4: Percutaneous pedicle screws insertion. (a) Adjustment the pneumatic drill parallel to the upper vertebral body end plate, (b) Adjustment the distance between the tip of the drill and the posterior median line according to preoperative planned distance, (c) Longitudinal shift of the drill to the entry point on the bone surface, (d) Adjusting the entry angle of the drill according to preoperative planned angle

Figure 4: Percutaneous pedicle screws insertion. (a) Adjustment the pneumatic drill parallel to the upper vertebral body end plate, (b) Adjustment the distance between the tip of the drill and the posterior median line according to preoperative planned distance, (c) Longitudinal shift of the drill to the entry point on the bone surface, (d) Adjusting the entry angle of the drill according to preoperative planned angle