Zimmer Biomet Persona, Surgical Technique, Page: 50 / 72

48 |
Persona
®
Revision Knee System
Surgical Technique
Bearing Assembly and Insertion
(cont.)
CCK Bearing Lockdown Screw Assembly
Insert the screw packaged with the bearing through
the hole in the bearing and into the tibial baseplate
(Figure 127). Hand tighten the screw using the
4.5 mm hex driver (Figure 128). Attach the counter
torque wrench to the anterior slot of the tibial baseplate
and tighten the knob.
While holding the counter torque wrench, use the
deflection beam torque wrench to tighten the screw in
a clockwise direction to 95 in-lbs (Figure 129). Reduce
the joint and move the knee through flexion and
extension. It is recommended that the torque wrench
is tightened two times to the target 95 in-lbs.
Close Incision
Freely irrigate the wound to ensure unwanted debris is
removed from the joint space prior to closure. Implant
assembly is now complete (Figure 130). A drain may be
placed intracapsulary. Close the wound with sutures
and apply a bandage.
Note:
Take care that the retractors do not
inadvertently dislodge the tibial baseplate,
particularly on the posterolateral corner. Verify
that the femoral component is fully seated before
closing the wound. Confirm that no portion of the
quadriceps mechanism have been pinned beneath
the femoral component before closing the wound.
Figure 128 Figure 127
Figure 129
Figure 130