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Local Anesthesia > Module 2 > Flashcards

Module 2 Flashcards

1
Q

What is the most common type of dental syringe?

A

Breech Loading

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2
Q

The needle is attached to the ______ of the syringe?

A

barrel

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3
Q

The Needle penetrates the ______ of the cartridge?

A

diaphragm

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4
Q

What is attached to the piston?

A

harpoon

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5
Q

The harpoon penetrates the ________ of the cartridge?

A

“bung” or rubber stopper

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6
Q

Local Anesthetic solution enters the _______ of the needle by using _______ pressure?

A

lumen positive

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7
Q

You utilize _______ pressure in order to aspirate?

A

negative

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8
Q

What type of syringe is used for single tooth pulpal anesthesia on the Mandibular Arch?

A

Pressure Syringes

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9
Q

Pressure Syringes are used in what 2 types of injections?

A

PDL Intra-ligamentary

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10
Q

What could be wrong if anesthetic is leaking during injection?

A

needle doesn’t puncture middle of diaphragm

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11
Q

What is the most common reason for a cartridge breaking?

A

Damaged during shipping (bent harpoon/needle, too much pos. pressure)

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12
Q

Why would the cartridge plunger rotate?

A

bent harpoon

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13
Q

What could be wrong if the harpoon disengages?

A

dull harpoon too much neg. pressure when aspirating

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14
Q

The greater the angle of the bevel the ______ the degree of needle deflection in the tissues?

A

greater

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15
Q

You can use the same needle for ______ injections?

A

3

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16
Q

A 30 gauge needle is _______ than a 27 gauge needle?

A

smaller

17
Q

A small gauge number has a ________ lumen?

A

big

18
Q

You get ________ deflection with a smaller gauge needle?

A

less

19
Q

The shaft of the needle runs from ______ to _____?

A

tip of needle through the hub and into the cartridge

20
Q

What is the weakest part of the needle?

A

hub

21
Q

Needle Length: short: ________ long: _________

A

20mm 32mm

22
Q

What is a cause of barbs on the needle tip?

A

manufacturer problem osseous contact

23
Q

How much anesthetic is in 1 cartridge?

A

1.8 ml

24
Q

What causes a big bubble in the cartridge?

A

freezing of the carpule

25
Q

What size of cartridge bubble is normal?

A

1-2mm

26
Q

What is the cause of an extruded stopper on the cartridge?

A

freezing of cartridge

27
Q

What is the cause of a “burning” sensation when injecting the anesthetic?

A

Normal Response! Ph of the drug, overheating/contamination of the anesthetic, or use of vasoconstrictor

28
Q

What is the most common type of topical anesthetic?

A

Benzocaine

29
Q

How long do you leave topical anesthetic on?

A

1-3 min

30
Q

What are the 4 steps of the Syringe Setup?

A

1- retract piston 2- insert cartridge 3- engage harpoon 4- thread needle onto adaptor

31
Q

What are the 4 steps for the breakdown of the Syringe?

A

1-Retract Piston 2-Remove Cartridge 3-Unscrew Needle 4-Place in sharps container

Local Anesthesia (7 decks)

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