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The trial modular epiphysis (centred or eccentric, size 1
or 2, depending on the proximal reaming choices made)
is placed on the trial modular stem (diameter chosen
during distal reaming and broaching).
The epiphysis position corresponds to the angulation
previously read on the broach handle goniometer. For
example, if 20° right was read on the goniometer, the
epiphysis hole marked 20° right should be positioned in
line with the stem orientation peg (Figure 61).
This angulation corresponds to the difference between
the version of the stem (close to anatomical retroversion
20° to 30°) and the epiphysis version for a reverse
shoulder (close to 0° retroversion).
No calculation is required: the instrumentation has been
designed to provide direct feedback of this position on the
goniometer.
The two trial components are then screwed together
using the 3.5 mm hex screwdriver (yellow handle) and the
special locking wrench for modular implants (size 10-12 or
14-16) (Figure 62).
Both trial components are then mounted on the humeral
implant driver by pushing and then releasing the blue
button (Figure 63).
humERAL TRiAL sTEm AND Epiphysis iNsERTioN
cEmENTLEss moDuLAR humERAL impLANTs
Figure 61
Figure 63
Figure 62
