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mittels mandrell wird die schraube mit oder ohne vorbohren durch die osteotomie gedreht und dann abgeknickt ( oder gelöst), sobald der schraubenkopf kortikalen sitz hat.
using a mandrel the screw is screwed through the osteotomy, with or without predrilling, and the outer section is then broken off (or released) as soon as the screw head is seated in the cortex.