When using an OBDNT approach
Immediately after the cortex is penetrated, the pin is redirected down the medullary canal along the axis of the bone. The pin is guided through the proximal fragment until it protrudes at the level of the fracture site. The tip of the pin can be cut and then directed into the distal fragment once the fracture is aligned. Cutting the tip of the pin minimizes the risk of penetration through the distal fragment cortex when the fracture is distracted.
Alternatively, the pin is driven in a retrograde fashion into the proximal fragment retracted and cut before reinsertion into the medullary canal of the distal fragment.