the armamentarium of local anasthesi
TRANSCRIPT
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The armamentarium of local anasthesia
Dr.Mohamed Rhael Ali2016 - 2017
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The equipment necessary for the adminstration of local anasthesia include:
The syringeThe needle
The local anasthetic cartridge
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The syringe
Parts of syringe Metal barrel
Plunger (piston)Screw hub
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Types of dental syringe
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Aspirating dental syringe
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Aspirating dental syringe
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Aspirating dental syringe
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Non aspirating dental syringe
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Non aspirating dental syringe
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Non aspirating dental syringe
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Non aspirating dental syringe
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Pressure syringe
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Pressure syringe
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Needle
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Factors considerd in selection of needle
The gauge : Refer to the internal diameter of the lumen
Small number
great diameter
Gauge 30 have smaller diameter than gauge 25
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Factors considerd in selection of needle
Th length : Dental needle available in two length Long ( average 32 )
Short ( average 20 )
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Cartilage ( carpule )
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Cartilage ( carpule )Parts of carpule :Glass tube, Stopper (end) , Alminium cap , Diaphragm
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Aspirating syringe
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Non aspirating syringe
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Clinical proplems associated with
dental syringe
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Leakage during injection
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Leakage during injection
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Bubbles in the cartilage
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Broken cartidge
Extruded stopper
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Burning on injection
Normal response to PH of the drug
Old (expire ) cartridge
Cartridge contain sterilizing solution
Over heated cartridge
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Clinical problems associated with
dental needle
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Pain on insertion
Can be avoided by using :
Sharp, new , disposible Needles
Topical anasthesia at the penetration site
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Pain on insertion
Repeated use of the needles lead to producing barbs on the tip of the needle making the injection painful
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Breakage of needle
Occure mainly due to force the needle against resistance ( contact bone ) or due to sudden
movement of patient during injection
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Pain on withdrawal
This occure mainly by fishhook barbs on the tip
This barbs may produced during the manufacturing process ,or during hard contact
with bone
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Injury to the patient or the administrator
Occure mainly due to inattention of the operator or sudden movement of the ptient
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General Notes• Dental cartidge and needles are disposible and never used in more than
one patient .
• Needles should be changed after several tissue penetration in the same patient .
• Needles should be coverd with a protective sheath when not being used .
• Administor should be aware the position of the needle tip ,whether inside or outside patient mouth to minimize the risk of injury to the patient or the operator .
• Cartridge should be stored at room tempreture and should never used after their expiry date .
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Thank you for listening