GMK Sphere Calipered Kinematic Alignment Surgical Technique
24
9.3 TIBIAL FINISHING
53.
The pins should always be placed in the opposite position:
one anteriorly and one posteriorly on tibial surface.
Alternatively, the tibial trial can be fixed using two frontal
pins which can be inserted with the trial insert in place.
54.
CAUTION
During trials, remove the trial femur before changing the
trial insert. Changing the trial insert with the trial femur in
place could be difficult due to the shape of the medial
compartment.
It is fundamental to perform the trial reduction and find the
correct position of the tibial trial in order to centre the
spherical medial femoral compartment on the spherical
medial tibial plateau.
In order to help identify the correct position of the tibial
baseplate two lines are marked on the anterior wall of the
tibial implant, corresponding to the alignment lines on the
trial tibial baseplate. Once the trial baseplate is fixed,
identify the position of these two lines on the tibia by
electrocautery.
Assemble the reamer guide to the trial tibial baseplate
following the marked numbers:
•
Position the reamer guide on the trial tibial baseplate
aligning mark (1) to the centre of the baseplate.
1
Centre of baseplate
55.
•
Turn the reamer guide aligning mark (2) to the centre of
the baseplate.
2
Centre of baseplate
56.
•
Push button (A) to fix the barrel onto the anterior pin.
A
57.
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