26
Check box position and box depth, and
finalize with the box rasp (rasps for size 2
and for sizes 4–10).
Important
Introduce the box rasp only in the longitudi-
nal direction; do not jam or tilt it, since this
can cause breakage of the femoral condyle.
Controlling the femoral resections and
anchorage
Insert the femoral trial using the impactor.
Removing residual dorsal condyles
Important
This must be checked in all cases!
Once the femoral resections are completed,
use the curved osteotome to remove all
osteophytes as well as protruding posterior
condyles. At this point, a posterior contrac-
ture can also be released. This will improve
flexion and prevent possible damage to the
polyethylene insert caused by these bony
projections.
Important
The femoral trial is used as a reference for
bone resection done with the curved
osteotome.
The femoral trial can be removed by using
the Knock In/Out instrument. If necessary, it
can be left in place to protect the femoral
condyle during tibial preparation.
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