POLYAXIAL TO MONOAXIAL CONVERSION
Equipment
2997-04-220
Key Inserter/Tightener
2997-04-320
Torque Limiting Handle 80in-lb (9Nm)
2997-04-205
Facilitator
2997-04-355
Tab Ring
Quick Stick Assembly – Comprised of:
2997-04-215
Quick Stick Sleeve
2997-04-217
Quick Stick Tube
2997-04-255
Counter Torque Handle
The Correction Key was designed with the intent to convert
the EXPEDIUM VERSE Pedicle Screw into a monoaxial
implant while allowing the screw to articulate about the
rod. Tighten the Poly Lock of the Correction Key with the
Torque Limiting Handle while applying counter torque to
lock the polyaxial head.
Caution: Prior to applying any final tightening to the inner
portion of the Correction Key (rod lock), ensure that the rod
is fully reduced by visualizing the outer portion of the
Correction Key is fully reduced and flush with the screw
head. You may have to remove tabs to verify that this step
has been successfully completed.
A counter torque instrument must be applied when
engaging the Poly Lock as well as during final tightening.
Proper counter torque can be applied by several means. The
Counter Torque Handle can be used with either the Facilitator
or the Quick Stick.
(FIGURE 31)
There are two ways to engage the Facilitator or Quick Stick
instruments. First, the open end of the Counter Torque
Handle can be used to engage the flats on the proximal end
of the tubular instruments. Second, depressing the button
on the closed end of the Counter Torque Handle and sliding
it over the proximal end of a Facilitator/Quick Stick will
engage and retain the instrument, providing a counter
torque assembly.
(FIGURE 32)
For instructions on Quick Stick assembly and attachment to
an implant, see the derotation section which follows.
Place the counter torque assembly over the head of the
screw. With the Key Inserter/Tightener attached to the
Torque Limiting Handle, insert the shaft through the counter
torque assembly into the castle drive feature of the
Correction Key Poly Lock. Tighten until there is a tactile
release which indicates that the required 80in-lb (9Nm) of
torque has been applied.
Caution: all set screw tightening must be performed using
the torque limiting handle to ensure system torque is
obtained and not exceeded. Not reaching or exceeding the
system torque may result in failure of the implant.
Relocate the counter torque assembly to additional screws
where polyaxial to monoaxial conversion is desired and
repeat the steps described above.
FIGURE 31
FIGURE 32
FIGURE 30
19
DePuy Synthes Companies
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EXPEDIUM VERSE System
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System Guide
Summary of Contents for EXPEDIUM VERSE
Page 1: ...SYSTEM GUIDE EXPEDIUM VERSE Spinal System...
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