Trial Cutting Guide Orientation
(continued)
Scorpio Trial Cutting Guide
Femoral Offsetting
There are several ways to determine the
proper femoral offset required.
1) Start with a neutral offset and measure
or estimate the distance from the
inferior surface of the anterior flange
of the TCG to the anterior femur
(Figure 11)
or,
2) Line up the femoral sizing “C” templates
with the trial stem and measure or
estimate the distance from the anterior
femur to the inferior surface of the
anterior flange of the TCG.
Note: A 4mm offset is typical for
many revision scenarios, and if an
A/P offset is not necessary, the
offset adapter may be used to
displace the femur medially or
laterally.
Note: When adjusting the offset of
the TCG, the entire offset adapter
and stem construct will be rotating.
To adjust the offset, insert the hex driver
into the distal face of the offset adapter
and rotate
(Figure 12)
. After final offset
position has been determined, tighten the
anterior set screw to secure the offset
position on the TCG
(Figure 6, page 4)
.
If an offset is required, record the final
position of the offset by reading the
location of the hash mark on the offset
adapter relative to the clock face on the
TCG. The clock recording will be
required when assembling the implant. If
an offset is not required, use the 0 adapter
(Figure 13)
.
Note: The numerical clock on the
TCG is a mirror image of the clock
face markings on the femoral trial
and final implant (Figure 14 and
Figure 14a).
6
Figure 11
Offset Measuring
Figure 12
Trial Cutting Guide
Offsetting
Figure 13
Offset Reading
Figure 14
Trial Cutting Guide and
Implant/Trial Clock Face
Figure 14A
Enlarged View of Clock
Face (0=Posterior Offset)
Anterior Set Screw
Femoral Sizing Template
8200-0096
#3/5
8200-0097
#7/9
8200-0098
#11/13
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