27
26
iNFERioR AND supERioR mETAgLENE
scREW pLAcEmENT
slide the locking screwdriver main body down the guide
pin and insert the screwdriver tip into the 4 slots of the
screw (Figure 40). Do not use the internal screwdriver rod
at this stage.
Warning: slide the screwdriver sleeve completely
down to protect the screw head before screwing
(Figure 41). Tighten the screw to obtain metaglene
plate compression (Figure 42).
Remove the screw guide pin using the pin extractor,
making sure that the internal locking screw stays in place.
Repeat the same process to put the superior locking screw
in place.
Drill the hole for the superior locking screw anticipating
exit through the cortex. The superior screw should be
directed at the base of the coracoid process and should
have an anterior orientation to avoid the suprascapular
nerve. A shorter screw is preferable to avoid nerve injury.
To obtain optimal compression of the metaglene plate
on bone, tighten the superior and inferior locking screws
alternately (Figure 43).
Figure 41
Figure 43
Figure 40
Figure 42
