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NexGen MIS LPS-Flex Mobile Implant System
Surgical Technique
Insertion of Femoral Provisional Using
Optional MIS Femoral Inserter/Extractor (cont.)
If needed, turn the adjustment knob (C) to achieve
the desired rotation of the femoral component (Figure
10c).
Turn the tension adjustment knob (D) to increase
(tighten) or decrease (loosen) the clamping force
(Figure 10d).
Close the locking handle to secure the instrument to
the implant or provisional (Figure 10e).
Place the collateral retractor laterally, an Army-Navy
retractor anteriorly, and a rake retractor on the
meniscal bed medially.
Align the implant or provisional onto the prepared
bone, and impact the end (H).
Open the locking handle by pressing the trigger (E) to
release the instrument from the implant or provisional.
If preferred, the femoral provisional may be positioned
by hand.
Translate the femoral provisional laterally until the
lateral peg of the provisional aligns with the drill hole
in the lateral femoral condyle. Push the provisional
in place beginning laterally, then medially. Be sure
that soft tissue is not trapped beneath the provisional
component.
Knee in extension.
Check to ensure that the femoral
provisional is flush against the resected surface on the
medial condyle. Then retract the lateral side and check
to make sure it is flush on the lateral side. The femoral
provisional should be centered mediolaterally on the
distal femur.
Insert the appropriate tibial articular surface provisional
and perform a trial reduction. Check ligament stability
in extension and in 30°, 60°, and 90° flexion. Attempt
to distract the joint in flexion to ensure that it will not
distract. Hyperflex the knee and check to make sure
that the spine still engages the cam.
When component position, ROM, and joint stability
have been confirmed, remove the tibial articular
surface provisional and then the femoral provisional.
Figure 10c
Figure 10d
Figure 10e
