41
Figure 63.
Workflow for Femur Bone Preparation
Figure 62.
Remove bone, working cleanly all the way down to the
white target surface.
Cut Femur
The handpiece is used to prepare four cylindrical
features in the patient’s bone in order to lock the
NAVIO™ femur cut guide onto the bone surface.
1. Align the handpiece tool, under speed control on
the cut zone (areas color-coded purple, blue and
green on the monitor), by utilizing the cross-hair
visualization, and the tool’s eye view.
2. With the drill footpedal engaged, slowly plunge
into the bone surface, taking care to remove all
the colors till the target surface (areas color coded
as white on the bone surface) is reached.
3. Avoid “feathering” the tool over the surface. Slow
methodic plunge motion will remove bone with
the greatest efficiency.
4. Once the locking features are prepared, clear the
surface of any residual debris using irrigation,
suction, and/or hand tools.
5. Place the femur distal cut guide on the anterior
features that have been prepared on the bone,
and lock its position using the stabilizer block.
The stabilizer block fits into the distal features
prepared on the bone.
6. On assembly, tighten the thumb screw on the
stabilizer block, to ensure that the stabilizer is
flush with the distal cut guide when assembled.
Tap on the cut guide assembly to ensure that
the distal cut guide is secured in place. Using
Visualize Cut mode, ensure that the cut guide is
appropriately located on the bone, per the user
plan. Secure the distal cut guide on the bone
surface using 1/8" diameter headless SPEED
PINS
TM
.
7. Using the recommended saw (with a blade
thickness of 1.35 mm), prepare the distal cut on
the patient bone. The stabilizer block can be left
on at this stage for additional rigidity of the cutting
block on the bone surface.
8. Detach the stabilizer block from the distal cut
guide. Based on the implant size plan, assemble
the JOURNEY™ II 5-1 drill guide, with the TKA
Adapter piece, as shown in Figure 63. Attach this
assembly to the distal cut guide, and drill through
the appropriate holes in the guide, based on the
femur implant sizing plan.
9. Remove the adapter piece and the distal cut
guide. In the drilled holes, insert the JOURNEY II
5-1 cut guide, as per the implant size planned,
and pin it in position, as described in the Smith
& Nephew JOURNEY II™ CR and BCS surgical
technique.
8
Bone Cutting
