44 DePuy Synthes MATRIX Spine System – Degenerative Surgical Technique
Optional Technique
Locking Cap Removal
If after multiple attempts to loosen the locking cap the
torque is still excessive, the following techniques should
be used:
Option A: Counter torque on a adjacent screw
Instruments
03.620.061
T-Handle with Ratchet Wrench
and with Torque Limiter, 10 Nm
03.632.400
Screwdriver Shaft Stardrive, T25,
standard, straight tip, with Hexagonal
Coupling, for Matrix
03.632.049
Counter Torque, standard,
for Matrix 5.5
03.632.006
Rod Pusher/Counter Torque, standard,
for Matrix 5.5
03.632.080
Handle, detachable, for Matrix
Place the rod pusher/counter torque with detachable
handle over an adjacent screw on the same rod (i.e. one
level higher or lower). Simultaneously place the counter-
torque over the locking cap to be loosened and engage
the screwdriver shaft and torque limiting handle with the
stardrive recess of the locking cap. Place the ratchet of
the torque limiting handle in the neutral position and
begin to sequentially turn clockwise and then immedi-
ately counter-clockwise. Turn until tactile or audible
feedback from the implant is experienced. Repeat the
steps until the locking cap is loose.
