25
24
metaglene superior-inferior cross section
polyaxial Locking screws
17˚
±10˚
iNFERioR AND supERioR mETAgLENE
scREW pLAcEmENT
Locking metaglene screws allow an angulation of ±10°
around the optimal 17° screw positioning
6
(Figure 35).
Locking screws must be used for the inferior and superior
holes.
hold the 2.5 mm drill guide against the inferior metaglene
hole. The drill guide can be angled to ±10° but should
always be seated fully on the metaglene hole. palpate the
bony pillar and direct into good bone. using the 2.5 mm
drill bit, start drilling through the subchondral bone to
about 10 to 12 mm depth (Figure 36). Then stop drilling
and push gently on the drill bit to make sure that the
drill is seated in bone. Redirect and re-drill to locate bone
stock if necessary.
Figure 35
Figure 36