21
Figure 28.
Figure 29.
•
Posterior Condylar Axis Collection
The femur posterior condyles selection for defining
the femur rotational reference, uses the most
medial and lateral posterior condyles collections,
and allows the user to dial in the medial-lateral axis
angle with respect to the two points collected.
Femur Joint Line Distance
[Optional- Based on Surgeon Preference]
The femur joint line distance allows the user to pick
a landmark point on the bone surface, and offset a
line perpendicular to the mechanical axis from that
point. This joint line reference can be used during
planning to place the implant component.
Tibial Condyle
There are three tibial landmark points to collect.
These points will be used as a visual reference
during Implant Planning (Section 6). It is important
to take care to understand where these points are
taken on the patient’s bony anatomy so that they
may be referenced properly during planning. Using
the point probe, collect the following (Figures 30-32):
•
Knee Center
Mark the tibial knee center at the ACL’s origin. The
knee center along with the ankle center define the
tibia mechanical axis.
Figure 30.
4
Registration
