15 |
Persona The Personalized Knee
Surgical Technique
Resect Proximal Tibia
(cont.)
Position Alignment Guide
(cont.)
Adjust the EM alignment guide in the sagittal plane
to be parallel to the anterior tibial crest. A 3.2 mm
drill or the 3.2 mm pin can be placed through the
hole in the slot of the cut guide to help assess the
expected slope of the tibial resection, and if
desired, match the patient's specific anatomic slope
(Figure 22). As necessary, adjust the tibial slope of the
EM alignment guide. If there is bulky bandage around
the ankle or if there is excessive adipose tissue, the
guide can be adjusted to create the desired slope.
This will help ensure that the tibia will be cut with the
proper slope. Care should be taken to avoid excessive
posterior slope and to verify coronal alignment to the
mechanical axis.
Figure 22
Figure 23
Set Resection Level
Each tip of the stylus indicates a different resection
level. The 2 mm tip is used to establish the resection
level from the defective tibial condyle for a minimal
cut. The 10 mm tip is used to establish the resection
level from the least involved tibial condyle.
To assemble, push and hold the lever on the stylus
and insert the stylus into the top of the cut guide
and release the lever (Figure 23). The stylus rotates
and telescopes to facilitate desired positioning of the
stylus tip.
Technique Tip:
Boom tip must be in the vertical
position to accurately assess resection level.
Correct position is verified with an audible click
as the boom twists. WARNING: An excessive bone
resection will result if the boom is not in the vertical
position.
Technique Tip:
If using the top surface of the cut
guide to make the resection, follow this technique
for setting the resection level with the stylus. Then
follow the optional technique at the end of this
section. The stylus tips are calibrated to the cut slot.
2. Insert
1. Push
3. Release
Persona Tibial Cut Guide
Right - 7°
42-5399-052-07
Persona Tibial Stylus - 2/10 mm
42-5399-005-00
