Zimmer Biomet NexGen MIS LPS-Flex, Руководство по хирургической технике

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NexGen MIS LPS-Flex Mobile Implant System
Surgical Technique
Resect the Patella (cont.)
Insetting Technique
Use the patellar reamer insetting guides as templates
to determine the appropriate size guide and reamer.
Choose the guide which will allow approximately 2
mm between the superior edge of the patella and the
outer diameter of the guide (Figure 12o).
Insert the appropriate size patellar reamer insetting
guide into the patellar reamer clamp. Turn the locking
screw until tight. Apply the patellar reamer clamp at
a 90° angle to the longitudinal axis with the patellar
reamer insetting guide on the articular surface.
Squeeze the clamp until the anterior surface of the
patella is fully seated against the fixation plate. Turn
the clamp screw to hold the instrument in place. The
anterior surface must fully seat on the pins and contact
the fixation plate.
Turn the clamp wing to the “inset” position.
Attach the appropriate size patellar reamer blade to
the appropriate size patellar reamer shaft (Figure 12p).
Use only moderate hand pressure to tighten the blade.
Do not overtighten the blade. Insert the patellar
reamer shaft into a drill/reamer.
Use the patellar reamer depth stops to control the
amount of bone to be removed based on the thickness
of the implant chosen.
Note: If using a primary porous patella with
Trabecular Metal material, all implants are 10 mm
thick.
The depth gauge wing on the patellar reamer clamp
can be used instead of the stops to control the amount
of bone remaining, rather than the amount of bone
removed.
Insert the reamer assembly into the patellar reamer
insetting guide. Raise the reamer slightly off the bone
and bring it up to full speed. Advance it slowly until
the prominent high points are reamed off the bone.
Continue reaming with moderate pressure. Remove
the reamer clamp assembly.
Figure 12o Figure 12p
2 mm
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