Zimmer Biomet Persona, Surgical Technique, Page: 25 / 72

23 |
Persona
®
Revision Knee System
Surgical Technique
Optional Femoral Sizing
and Positioning
Straight Stem Preparation
The femoral sizing/cut guide and straight stem reamer
adapter may be used to determine femoral size,
position and rotation. If bony resections are necessary,
select the appropriate femoral sizing/cut guide that
provides the desired A/P and M/L femoral coverage
and rotation while avoiding femoral overhang. Attach
the straight stem reamer adapter to the femoral sizing/
cut guide (Figure 53).
Note:
Use the 5 mm hex driver to ensure the set
screws in the straight adapter and femoral sizing/
cut guide are loose to assist with ease of assembly.
Once assembled, slide the construct over the reamer.
The M/L width and shape of the sizing/cut guide
matches the equivalent sized femoral implant. Check
the coverage of the femoral sizing/cut guide and
determine if an offset is required based on overhang
and resection assessments.
Figure 53 Figure 54 Figure 55
Note: If an offset stem is required, proceed to the
Offset Stem Preparation section on page 24.
The resection guide (angel wing) or epicondylar
alignment guide may be utilized to determine femoral
rotation adjustments or if cuts are required to accept
the femoral provisional (Figure 54). If necessary, the
set screws in the straight stem reamer adapter and
in the sizing/cut guide can be rigidly locked down
(Figure 55).
Note: The straight stem adapter and femoral sizing/
cut guide construct has two screws. One locks the
straight stem adapter to the sizing/cut guide and
one locks the full assembly to the reamer.
Note: If the use of a tapered stem is necessary,
proceed to Appendix A: Tapered Stem Preparation
section on page 49.