Zimmer Biomet iASSIST Knee Manual page 14

iASSIST 2-Pod Version Surgical Technique
12 |
Femoral Registration
1. Break the cortex at the mechanical axis entry point
with a cortex breaker or a 3.2 mm drill bit.
2. Impact the femoral spike or the CAS 7.9 mm Small
Spike into the distal femur (2.5-3.5 cm).
Warning: The spike should be aligned within 15
degrees of the mechanical axis of the femur and
be within 15 degrees perpendicular to the final
required orientation of the cut. This alignment is
required because of the mechanical adjustment
limit of the femoral adjustment mechanism.
3. Slide the femoral reference onto the spike.
4. Align the remoral reference in a neutral rotation
position.
Figure 3.3.1
Distal Femur Cut – Femur Rotation Alignment
5. Affix the femoral reference on the bone with one
Note: The femoral rotation may be set by:
a. Aligning the indicator arrow at the end
of the femoral reference to Whiteside's line;
b. Aligning a pin inserted in the dedicated
mediolateral hole on the body of the femoral
reference to the epicondyles.
3.5 X 38 mm hex head screw in one of the anterior
fixation holes.
Note: The 500 RPM adaptor of the Zimmer
Universal Power System Surgical Instruments
can be used to secure the screw.
Warning: From registration to validation, the
instruments must remain stable and properly
fixated to the bone to ensure the accuracy of
the system.
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