previous section: 5/8 page: 5/6 next

5Preparing the channel

Positioning the seating chisel

The seating chisel is meant to be driven exactly parallel to the guide wire in both planes. The seating chisel is hammered into the distal femur with a mallet. Particular in the young, the seating chisel “back-slapped” using the slotted hammer. For each 15 mm of insertion this back-slapping should be performed. Otherwise, the seating chisel will become jammed in the bone. Repeatedly check parallelism with the guide wire.
In hard bone, it may become necessary to pre-drill the seating chisel track, but this requires great care to keep the 4.5 mm drill bit exactly parallel to the guide wire.