Basic Technique Principles, contd.
Schanz Screw Insertion Click on image
  for enlarged view
[1]   Insert drill sleeve assembly Make a stab incision. Pass the triple trocar (3.5 mm Trocar, 5.0 mm/3.5 mm Drill Sleeve, and 6.0 mm/5.0 mm Drill Sleeve) through the soft tissue and penetrate the periosteum. Dimple the cortex with the trocar to prevent walking of the drill bit.

[2]   Drill both cortices Remove the trocar, and drill through both cortices using the 3.5 mm Drill Bit.

Note: 4.5 mm Schanz screw insertion requires overdrilling the near cortex with a 4.5 mm Drill Bit.

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