11 DePuy Synthes MATRIX Spine System – Degenerative Surgical Technique
Optional Technique
Unassembled Pedicle Screw Insertion
2. Assemble polyaxial head
Instruments
03.632.037
Positioning Instrument for Polyaxial
Screw Heads, for Matrix 5.5
68.632.125
Loading Station for Matrix 5.5
Insert the inner shaft of the positioning instrument into
the handle and tighten in the clockwise direction.
To pick up a screwhead, align the positioning instrument
for polyaxial screw heads to the rod slot features on the
poly axial head implant and press down.
Position the placement tool with the polyaxial head over
the unassembled pedicle screw and press down. To en-
sure the polyaxial head is securely attached to the unas-
sembled pedicle screw, gently lift up on the placement
tool and angulate the polyaxial head.
To release the head placement tool, press the button lo-
cated at the distal end of the instrument.
Notes:
•
If the polyaxial head does not successfully attach
to the head of the unassembled pedicle screw, ad-
ditional reaming or screw height adjustment may
be required to ensure sufficient space exists to
allow free mobility of the head.
•
Polyaxial screw heads can be removed a maxi-
mum of three times without removing the pedicle
screw; a new head must be used for each assembly.
