Zimmer Biomet Persona, Surgical Technique, Page: 36 / 72

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Persona
®
Revision Knee System
Surgical Technique
Figure 87
Final Trialing
Shim Thickness
(mm)
Bottom Thickness
(mm)
Screw Length
(mm)
Tibial Construct
Thickness (mm)
10
12
14
+0 10–14 10–14
10
12
14
+6 16–20 16–20
10
12
14
+12 22–26 22–26
With the final provisional components in place,
reinsert the TASP assembly into the joint. Check
ligament stability in extension, in 30, 60, 90 and
120 degrees of flexion and check for posterior
osteophytes. Attempt to distract the joint in flexion
(Figure 87). Perform a range of motion to check
patellar tracking. Ensure the spine clears all bone in
the femoral box.
The CPS and CCK TASP may be assessed if further
stability is needed. The CPS and CCK TASPs provide an
increase in constraint.
CPS and CCK Bearing TASP Assembly
Select the TASP bottom that matches the tibial
baseplate provisional. Select the CPS or CCK TASP top
that mates with the femoral provisional.
The provisional lockdown screws should be used
with the tibial provisional during range of motion
assessment to give the CPS and CCK TASP constructs
the necessary rigidity to assess varus/valgus and
internal/external constraint. The provisional lockdown
screws are specific to the TASP bottom thickness being
used. See the chart for appropriate screw length use.
Use the 3.5 mm hex driver to tighten the TASP construct
to the tibial baseplate provisional (Figures 88 and 89).
Do not overtorque the provisional lockdown screw.
Note: The provisional lockdown screw is not
compatible with the tibial baseplate implant.
Figure 88 Figure 89