39
38
Fit the appropriate trial glenosphere (38 mm or 42
mm, centred or eccentric) to the metaglene using the
metaglene holder (Figure 71).
For eccentric glenospheres, the vertical laser marking of
the trial glenosphere should be
aligned with the base of the
coracoid superiorly and with
the scapula pillar inferiorly. The
arrow indicates the position of
the eccentricity and should be
positioned postero-inferiorly,
aligned with the mid-line of the
scapular pillar.
cup TRiALs AND TRiAL REDucTioN
First place the high mobility humeral trial cup (38 or
42 mm depending on the glenosphere size), which is 3
mm thick, in the trial epiphysis (Figure 72). The shoulder
should then be reduced with longitudinal traction and
assessed for a full range of motion.
Figure 71
Figure 72
