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NexGen MIS LPS-Flex Mobile Implant System
Surgical Technique
Step Seven
Option One: MIS Notch/Chamfer Trochlear Guide
The MIS notch/chamfer trochlear guide consists of 2
pieces for each size, the MIS notch/chamfer guide and
the MIS trochlear guide. Matching sizes must be used.
The MIS notch/chamfer trochlear guide may be used
to complete the chamfer cuts, the trochlear groove,
the intercondylar box and to drill the peg holes after
the anterior and posterior cuts have been made with
the MIS femoral finishing guide.
After the anterior and posterior cuts have been made,
check the flexion gap and the extension gap using the
MIS spacer block. Make the necessary adjustments.
Knee in slight flexion.
Position the appropriate size
MIS notch/chamfer guide onto the femur so it is
flush against the resected surfaces both distally and
anteriorly. Ensure that no soft tissue or osteophytes
interfere with instrument positioning. Position the
guide mediolaterally (Figure 7a).
Note:
The distal mediolateral profile of the MIS
notch/chamfer guides, anterior to the tabs, can be
used to position the guide referencing the lateral
condyle.
Insert two short headed pins or short screws through
the anterior flange of the guide to secure the guide in
position (Figure 7b).
Knee in 90° flexion.
Secure the MIS notch/chamfer
guide to the femur distally with two short spring
screws or 3.2 mm (1/8 in.) headed screws. Alternatively,
insert two headed pins (Figure 7c).
Figure 7a
Position the MIS notch/chamfer guide flush against the femur
Figure 7c
Secure the MIS notch/chamfer guide to the femur
Figure 7b
Insert two short headed pins or short screws
through the anterior flange
