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5Drilling

The maximal permitted diameter of the screw is one third of the diameter of the avulsed fragment.

Choosing screw size

The maximal permitted diameter of the screw is one third of the diameter of the avulsed fragment.
Screw length needs to be adequate for the screw to penetrate the opposite cortex.
Most commonly, a 1.0 mm screw is used. 1.3 mm screws can also be used for large fragments.