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pre-drills
Pre-drilling a pin tract hole in the bone into which the ESF pin is subsequently inserted is very important as the ESF pins do not have drilling ends. Otherwise insertion of an ESF pin directly into the bone may cause impaction, micro-fracturing of the bone and excessive heat production with bone necrosis, all of which can lead to pin loosening.
In stock
SKU
PRE-1245
Pre-drilling a pin tract hole in the bone into which the ESF pin is subsequently inserted is very important as the ESF pins do not have drilling ends. Otherwise insertion of an ESF pin directly into the bone may cause impaction, micro-fracturing of the bone and excessive heat production with bone necrosis, all of which can lead to pin loosening.
A drill bit that is about 10% smaller than the shank (core) diameter of the pin, or at least 0.1mm smaller should be used. A slow speed (electric) drill at about 150rpm is advisable, using flush to cool the pin and minimise heat generated in the bone that could cause bone necrosis and pin loosening.
An appropriate drill guide is used to protect the soft tissues and minimise drill wobble and skidding. Once the hole is drilled, a K-wire can be used to maintain the pin tract (before the drill guide is removed) so it can be easily re-identified once the ESF pin is ready to be inserted.