Holes should be prepared, starting with
the calcaneal screw holes as shown in figure
5
K-wires may be used to temporarily hold
the plates in position until the screws
are inserted
Drilling guides (219 665ND) are fixed
to the plate on the appropriate threaded
holes using the screwdriver (219 865ND)
Screw Insertion
For each hole, the following steps must
be followed as shown in figures 6a to 6f:
Warning: Steps
a to f should be completed for each screw
before starting preparation of the subsequent
screw(s). If not, the axes of the screw
and the prepared hole may be misaligned.
Drill with (219 545ND for screws diam.
4.5mm –
or 219 565ND for screws diam. 6.5mm) through
the drill guide. The screw length can be
read from the calibrated scale on the drill.
The length is read from the top side of
the drill guide (figure 6a).
Alternately, the screw length can be measured
using the depth gage (219 345ND for screws
diam. 4.5mm – or 219 365ND for screws
diam. 6.5mm) (figure 6b)
Chamfer (countersink) the drill hole with
the screwdriver (219 845 for screws diam.
4.5mm
– or 219 865 for screws diam. 6.5mm).
Ensure
that the threaded hole is not damaged when
performing the chamfering (figure 6c).
Clean the threaded hole before and after
introducing the screw. Insert the screw
into the prepared hole until it reaches
the end. Maintain axial alignment between
the screw and the threaded hole (figure
6d).
Positioning the lock-screw
Assemble the lock-screw to the appropriate
screwdriver or power driver. The screw and
lock-screw should be inserted in each hole
before starting preparation of the next
screw
hole (figure 6e).
Locking: Fully
seat the lock-screw with the screwdriver.
The lock-screw should be flush
with the top of the plate when it is fully
inserted (figure 6f).
