58 |
Persona The Personalized Knee
Surgical Technique
Size Femur – Anterior
Referencing Sizer
(cont.)
Size Femur and Establish External Rotation
(cont.)
Technique Tip:
Positioning the anterior referencing
sizer boom tip on the “high” part of the femur by
lateralizing the location of the anterior referencing
sizer boom tip can often lessen the likelihood of
notching the femur.
After the anterior referencing sizer boom is
appropriately positioned, read the femoral size from
the engraved lines on the anterior referencing sizer
tower and select the closest size (Figure 120). 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 same
size markings are present on the anterior surface of
the anterior referencing sizer boom and approximate
the proximal position of the anterior flange of the
femoral component when telescoped to the same
size that has been determined by the vertical anterior
referencing sizer tower (Figure 121). The 3 degrees
or 5 degrees holes in the midline of the A/P portion
of the anterior referencing sizer are used to drill
3.2 mm holes for pegs on the anterior referencing
4-in-1 femoral cut guide (Figure 122).
Figure 120
Figure 121
Figure 122
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
anterior referencing 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.
25 mm x 2.5 mm Female Hex Screw
42-5099-025-25
3.2 mm Drill
00-5120-085-00
Appendix C: Optional Instruments
(cont.)
