Armamentarium Of LA Flashcards
(37 cards)
3 EQUIPMENTS? for L.A
1.Syringe
2.Needle
3.Cartridge
ADA CRITERIA FOR ACCEPTANCE OF LOCAL ANESTHETIC SYRINGE?
- Tey must be durable and able to withstand repeated
sterilization without damage. (If the unit is disposable, it
should be packaged in a sterile container.) - Tey should be capable of accepting a wide variety of car-
tridges and needles of diferent manufacture, and should
permit repeated use. - Tey should be inexpensive, self-contained, lightweight,
and simple to use with one hand. - Tey should provide efective aspiration and be con-
structed so that blood may be easily observed in the car-
tridge.
Whats Syringe?
It is the vehicle whereby the contents of the anesthetic cartridge are delivered through the needle to the patient
Types Of Syringes for L.A in dentistry?
- Nondisposable syringes:
a. Breech-loading, metallic, cartridge-type, aspirating
b. Breech-loading, plastic, cartridge-type, aspirating
c. Breech-loading, metallic, cartridge-type, self-
aspirating
d. Pressure syringe for periodontal ligament injection
e. Jet injector (“needle-less” syringe) - Disposable syringes
- “Safety” syringes
- Computer-controlled local anesthetic delivery systems
Disadvantages Of Disposable Syringes?
->Does not accept prefilled dental cartridges
->Aspiration difficult
Pressure syringe for periodontal ligament injection
Jet injector
Pressure syringe is for periodontal ligament injection
jet injector is for phobic pts
Non aspirating syringes arent recommended because?
risk of inadvertent
intravascular drug administration
_____ Syringe is most commonly used in dentistry?
Te breech-loading, metallic, cartridge-type syringe
T /F Te aspirating syringe has a device such as a sharp, hook-
shaped end (often called the harpoon) attached to the piston
that is used to penetrate the thick silicone rubber stopper
(also called the bung) at the opposite end of the cartridge
(from the needle)
T
How aspirating needle helps in not injecting anesthetic in a bv.
when negative pressure is exerted on the thumb ring by the
administrator, blood will enter the needle and be visible in
the cartridge if the needle tip rests within the lumen of a
blood vessel
+ and - of breech loading metalic aspirating syringe
+
Visible cartridge
Aspiration with one hand
Autoclavable
Rust resistant
Long lasting with proper
maintenance
-
Weight (heavier than plastic
syringe)
Syringe may be too big for
small operators
Possibility of infection with
improper care
Breech-Loading, Plastic, Cartridge-Type,
Aspirating
A plastic, reusable, dental aspirating syringe is available that
is both autoclavable and chemically sterilizable. With proper
care and handling, this syringe may be used for multiple
anesthetic administrations before it is discarded
+ and - of Breech-Loading, Plastic, Cartridge-Type,
Aspirating
+
Plastic eliminates metallic,
clinical look
Lightweight: provides bet-
ter “feel” during injection
Cartridge is visible
Aspiration with one hand
Rust resistant
Long lasting with proper
maintenance
Lower cost
-
Size (may be too big for
small operators)
Possibility of infection with
improper care
Deterioration of plastic with
repeated autoclaving
T/F The major factor infuencing ability to aspirate blood is
not the syringe but the gauge of the needle being used
T
Disposable Syringes?
Most often they are used for intramuscular or intravenous drug administration,they they also may be used for intraoral injection
There is no thumb ring aspiration,it requires both hands
In addition these syringes do not accept dental cartridges
Adv and Dis ADV of disposable syringes?
ADVANTAGES
Disposable,single use
Light weight
Sterile until opened
DISADVANTAGES
Does not accept prefilled dental cartridges
Aspiration difficult
needle in dentistry?
Needle is a vehicle that permits local anesthetic solution to travel from the dental cartridge into the tissues surrounding the needle tip
Most needles used in dentistry are stainless steel and disposable
What are the parts of the needle?
PARTS OF NEEDLE
Bevel
Shaft
Hub
Syringe adaptor
Cartridge penetration end
What does “gauge” refer to in relation to needles?
Gauge refers to the diameter of the lumen (internal opening) of the needle.
How does gauge number relate to lumen diameter?
The smaller the gauge number, the larger the diameter of the lumen.
Which has a larger internal diameter: a 25-gauge or a 30-gauge needle?
A 25-gauge needle has a larger internal diameter than a 30-gauge needle
Why is there a trend toward using smaller diameter needles?
They are believed to be less traumatic to patients.
What are the most commonly used needle gauges in dentistry?
30-gauge short and 27-gauge long needles
Recommendations for NEEDLE USE in dentistry?
Sterile disposable needles should be used
If multiple injections are to be administered needles should be changed after three or four insertions
A needle should never be forced against resistance
Needle used remain capped until used and should be safe immediately when with drawn
