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NexGen MIS LPS-Flex Mobile Implant System
Surgical Technique
Position the Guide
Place the spring arms of the ankle clamp around the
ankle proximal to the malleoli and loosen the anterior
knob that provides mediolateral adjustment at the
ankle. If preferred, the spring may be used instead of
the ankle clamp.
Loosen the knob on the proximal end of the distal
telescoping rod and adjust the length of the guide until
the tibial cut guide is positioned at the approximate
depth of cut. With the tibial cut guide and tubercle
anchor contacting the bone, move the tibial cut guide
mediolaterally to align the rod with the medial third of
the tibial tubercle (Figure 1e). This will usually place
the proximal end of the adjustable rod so it is centered
below the intercondylar eminence. The tibial cut guide
will contact the tibia at an oblique angle and the low-
profile portion of the cutting head should fit under
the patellar tendon (Figure 1f). The tubercle anchor is
shaped to fit between the patellar tendon and the base
of the cutting head.
Note:
Be sure that only the low-profile portion
of the cutting head extends beneath the patellar
tendon.
When correctly aligned, the distal telescoping rod
and tibial adjustable rod should be parallel to the
tibia in the coronal and sagittal planes. To help avoid
rotational malalignment of the rod, check its position
from a direct anterior view, ie, stand at the foot of the
operating table.
Insert an MIS screw into the tibial tubercle through the
hole in the tubercle anchor (Figure 1g).
Figure 1e
Figure 1f
Figure 1g
Tibial Cut Guide
Tubercle
Anchor Hole
