Defining The Center Punch Point/Screw Hole - B. Braun Aesculap Spine Quintex SC420R Gebrauchsanweisung/Technische Beschreibung

4.4.1

Defining the center punch point/screw hole

The following drill guides can be used:
■
Adjustable single drill guide E
■
Adjustable double drill guide F
■
Single drill guide, fixed (14 mm) G
■
Double drill guide, fixed (14 mm) H
The screw insertion angle can be adjusted in a cranial-caudal direction.
The screw insertion angle can also be adjusted in a medial-lateral direc-
tion when using a single drill guide or cortical center punch I.
The guide sleeves 3 for drill guides E and F are interchangeable.
Single drill guide E and double drill guide F are depth-adjustable. Fixed
single drill guide G and fixed double drill guide H are designed for a center
punch/drill depth of 14 mm (not depth-adjustable).
Note
The fixed single drill guide G and the fixed double drill guide H are labeled
"14 mm" on the sleeve for easier identification.
Risk of spinal cord trauma if the drill depth of the
drill guide is incorrectly set!
►
Insert the cortical center punch or drill in the
WARNING
drill guide and check the drill depth setting with
a caliper or ruler.
Risk of injury to the spinal cord of the patient if the
self-centering cortical center punch is not used or
is used incorrectly!
WARNING
►
Always use the self-centering cortical center
punch with outer sleeve to determine the cor-
rect position for piercing the cortical bone.
Damage to the Quintex® plate/screw and cortical
center punch through the use of excessive force
and torque when center punching or screwing in
WARNING
the Quintex® screw!
►
Do not use the cortical center punch to prepare
screw holes in hard bone, instead use a drill and
tap.
Incorrect drill depth and damage through the use
of a re-sharpened or shortened cortical center
punch or drill!
CAUTION
►
Do not re-sharpen the cortical center punch
(without outer sleeve) and drill.
►
Replace blunt cortical center punches and drills
with new ones.
a
11
b
Fig. 8
Legend
a Self-centering cortical center punch I complete
b Self-centering cortical center punch I, without outer sleeve 11
Fig. 9
►
Insert cortical center punch (without outer sleeve) I and drill K with
drill guides E, F, G or H only.
Note
The maximum penetration depth of the cortical center punch I with
mounted outer sleeve is 6 mm.
Note
The maximum penetration depth of the cortical center punch I through the
drill guide is 6 mm to the shoulder between distal tip with trochar and the
shaft.
This shoulder will act as a stop on the cortical bone.
Incorrect positioning of the center punch point or
center punching too deep!
►
CAUTION Use the cortical center punch without outer
sleeve only in combination with a drill guide.
►
Do not center punch too deep.
►
Insert the cortical center punch (without outer sleeve) I or drill K into
the drill guide and check depth with caliper (e.g. 14 mm).
►
To adjust the required drill depth with the depth-adjustable drill
guides E and F (10 mm to 28 mm), turn guide sleeve 3 of the drill guide
in direction + or –.
Note
The thread in the drill guide is a left-hand thread. Every half turn (= depth
adjustment by 0.5 mm) you will hear and feel the guide sleeve clicking into
position.
I
I
K
7