Carl Martin CerviJect Instrucciones De Uso página 5

CerviJect
Injection system for intraligamental anaesthesia, for use with a 1.8 ml cartridge and
metric threaded needle that can be used in intraseptal anaesthesia.
Intended for use only by dental professionals.
Intraligamental anaesthesia (ILA) is a special form of infiltration and terminal anaes-
thesia. ILA differs from terminal anaesthesia in that the injection is placed directly
into the gingival sulcus of the affected tooth and not parallel to the tooth axis in
the mucobuccal fold of the mucosa adjacent to the tooth to be anaesthetised. This
allows selective anaesthesia of only the tooth to be treated, while with terminal
anaesthesia at least 2-3 teeth are affected by the anaesthetic.
Instructions for use
1. Construction of the CerviJect syringe
The functional components and assembly of the CerviJect syringe are shown in the
following diagram:
10 5 1
2 4
1 barrel
2 viewing chamber
with cartridge
3 plastic sleeve
4 bayonet catch
5 threaded nozzle for injection needle
GB
7 8
3 9
6 hand piece
7
dosing lever
8
resetting key
9
dosing plunger
10 disposable needle (not included
in the pack contents)
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2. Preparation
To return the plunger (9) to the starting point, depress the resetting key (8) and hold
the syringe in an upright position (bayonet catch up).
Place the plastic sleeve (3) in the barrel (1).
Insert a standard cartridge in the barrel. Connect the barrel (1) and hand piece (6)
using the bayonet catch (4). Depress the dosing lever (7) until a slight resistance is
felt. The dosing plunger is now in contact with the anaesthetic cartridge bung and
presses the tip of the cartridge into the inner part of the nozzle.
Insert a disposable needle into the nozzle and screw the hub onto the thread. We
recommend the use of the cartridge of disposable needles in sizes 0.3 x 12 mm or
0.3 x 16 mm with the corresponding short needle point.
Depress the dosing lever until the anaesthetic solution emerges from the needle
point. The syringe is ready for use.
6
After loading and assembling the syringe according to
directions, guide the needle along the neck of the tooth into
the gingival sulcus with direct access to the periodontal
space. The needle is generally inserted from the buccal/
labial or palatal/lingual aspect. Make the first press for
injecting the anaesthetic as soon as there is perceptible
contact with the alveolar bone. There should be a marked
resistance, which guarantees that the anaesthetic does not
flow into the surrounding soft tissue but that there has been
adequate intraosseous infiltration. After delivery of approx.
0.2 ml of the anaesthetic (3-4 presses of the syringe each
0.06 ml) it can be assumed that there is a sufficient degree of
anaesthesia. An external sign is that the mucosa appears
pale due to vasoconstriction.
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