21 |
Persona The Personalized Knee
Surgical Technique
Figure 40
Figure 41
Size Femur and
Establish External Rotation
(cont.)
After the sizer is appropriately positioned on the femur,
read the femoral size from the engraved lines on the
sizer tower and select the closest size (Figure 40).
There are six even sizes labeled on the left side of the
tower and six odd sizes labeled on the right side of the
tower, with lines indicating the in-between sizes. The
3 degrees or 5 degrees holes in the midline of the A/P
portion of the sizer are used to drill 3.2 mm holes for
pegs on the anterior referencing 4-in-1 femoral cut
guide (Figure 41). A 3.2 mm pin may be placed in the
first drilled hole to maintain an “index” position prior
to drilling the second hole. Remove the screws, then
remove the sizer.
Technique Tip:
The multi pin puller cannot be used
to extract the screw(s).
Technique Tip:
This anterior referencing sizer
works only with these anterior referencing 4-in-1
femoral cut guides and provisionals, and implants
referenced in this technique.
Technique Tip:
If the femoral size is determined to
be a size 3 or bigger but was prepared for a size 1
or 2, consider cutting additional distal bone using
the 1 mm resection plate.
