37
36
Continued from page 28.
The monobloc implant size should be chosen to suit the
initial distal reaming diameter and the size of epiphysis
that is the best match for the bone stock. please
note that monobloc humeral implants are designed
to be cemented. Eccentric epiphyseal components
are therefore NoT available for monobloc cemented
humeral implants.
choose the most appropriate epiphysis size by placing a
monobloc implant sizer disk in size 1 (yellow) or 2 (blue)
on the proximal reaming guide. The most appropriate
size will be that of the sizer disc that provides the best
possible coverage of the bone resection surface (Figure
66).
Remember the final decision taken, epiphysis size 1 or 2.
This will determine reamer and final implant sizes. Remove
the sizer disk.
select the appropriate proximal reamer for the monobloc
implant, size 1 (yellow handle) or 2 (blue handle),
depending on the results of the previous trials. carry out
the metaphyseal reaming using a power reamer (Figure
67). use the colour code to check compatibility between
the sizing disk chosen and the proximal reamer.
complete reaming is achieved when the external reamer
flange is in full and complete contact with the bone
resection surface. When the proximal reaming has been
completed, remove the reaming guide using the reaming
guide holder.
pRoXimAL humERAL REAmiNg
cEmENTED moNoBLoc humERAL impLANTs
mAKE
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RE
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usi
N
g
Th
E
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ic
A
TED
iN
sTR
um
ENT
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Em
ENTED
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oc
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Figure 66
Figure 67
Disk size 1
Disk size 2
