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4Small fragment fixation

Drill a gliding hole for a 1.0 mm screw, as perpendicularly to the fracture plane as possible, using a 1.0 mm drill bit.

Drilling

Drill a gliding hole for a 1.0 mm screw, as perpendicularly to the fracture plane as possible, using a 1.0 mm drill bit.
Use a 0.8 mm drill bit to drill a thread hole in the opposite fragment, just through the far (trans) cortex.

Note
Be careful to select appropriately-sized instruments. The use of too large drill bits or screws may result in fragmentation.