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Instruments of Local Anesthesia
شرح جراحة طب اسنان مرحلة 3


The equipment necessary for the administration of local anesthesia include:
1. Dental Syringe.
2. Dental Needle.
3. Dental Cartridge.
Dental Syringe It is the vehicle whereby the contents of the anesthetic cartridge are delivered
through the needle into the tissue of the patient.


NeedleThe needle permits the local anesthetic solution to travel from the cartridge into the
tissue surrounding the needle tip. Most needles used in dentistry are stainless steel. They are
usually pre-sterilized and are disposable. All needles have several components, which are:


Dental Cartridge (Carpule)
The dental cartridge is a glass cylinder containing the local anesthetic solution. It consists of:
1. Cylindrical glass tube.
2. Stopper located at the end of the cartridge that receives the hook of the aspirating syringe.
3. The aluminum cup is located at the opposite end of the cartridge from the stopper to hold
the diaphragm in its position.
4. Diaphragm




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