Insert Pedicle Screws (Posterior Approach) - Synthes USS Small Stature/Paediatric Spine System Manual

Insert Pedicle Screws
(Posterior Approach)
1. Open pedicle and determine screw
length
Use one of the pedicle awls (1) (388.551 for screws
Ø 4.2 mm, 388.550 for larger screws) to open the cortex
of the pedicle to a depth of 10 mm. Continue opening
the pedicle using one of the pedicle probes (2) with
markings at 30, 40 and 50 mm.
• 388.538 for Ø 4.2 mm screws;
1 2
• 388.540 for Ø 5.0 and 6.0 mm screws;
• 388.539 for Ø 7.0 mm screws.
Determine the length of the pedicle screws with the
depth gauge for pedicle screws (357.789).
2. Probe pedicle channel
Using the straight feeler Ø 2.3 mm (388.545) or the
curved feeler Ø 2.3 mm (388.546), probe the pedicle
screw channel in order to check for perforations in the
walls.
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4 DePuy Synthes USS™ Small Stature/Paediatric Spine System Surgical Technique