Prepare Pedicle
continued
8
Synthes Spine
Sm
a
ll St
a
ture USS
7
Prepare pedicle
continued
Open the pedicle c
a
n
a
l, using the pro
b
e or the pedicle pro
b
e
for 4.2 mm screws. Displ
a
ce the soft c
a
ncellous
b
one
b
y
a
d-
v
a
ncing the pro
b
e into the pedicle c
a
n
a
l. If the pro
b
e resists
a
dv
a
ncement, use r
a
diogr
a
phic im
a
ging to check position
a
nd orient
a
tion. C
a
re should
b
e t
a
ken to not perfor
a
te the
w
a
lls of the pedicle.
P
a
lp
a
te the w
a
lls of the pedicle using
a
str
a
ight
ba
ll tip pro
b
e
or curved
ba
ll tip pro
b
e. Use r
a
diogr
a
phic im
a
ging to confirm
position
a
nd orient
a
tion.
8
Select proper screw length
Instrument
388.545
Str
a
ight B
a
ll Tip Pro
b
e
Pl
a
ce the str
a
ight
ba
ll tip pro
b
e into the pedicle c
a
n
a
l to
determine proper screw length.
This instrument h
a
s depth m
a
rkings
a
t 25 mm, 30 mm,
40 mm, 50 mm, 60 mm
a
nd 70 mm.
Position
a
ll screws
a
pproxim
a
tely 50–80% into the verte
b
r
a
l
b
ody.*
* M.E. Müller, M. Allgöwer, R. Schneider, H. Willenegger,
Manual of Internal
Fixation
, 3rd Edition (Berlin: Springer-Verl
a
g, 1991): p. 668.
