Module 9

Question 1

The larger the gauge the smaller the diameter (T/F)

Answer 1

True

Question 2

Definition: The angled surface of the needle tip

Answer 2

Bevel

Question 3

Blood enters carpule

Answer 3

Positive aspiration

Question 4

No blood; small bubble may enter carpule

Answer 4

negative apsiration

Question 5

What is the weakest part of the needle?

Answer 5

Hub + Needle adaptor (b/c this is one piece)

Question 6

The carpule penetrating end of a needle is place before the carpule is loaded. (T/F)

Answer 6

False its placed after

Question 7

What are the two needle lengths used in dentistry?
Long =
Short =

Answer 7

Long= 32 mm
Short = 20 mm

Question 8

What is the needle length selection based on?

Answer 8

Amount of tissue that must be penetrated

Question 9

When should the needle be replaced?

Answer 9

After 3-4 penetrations or if the needle becomes contaminated

Question 10

A local anesthetic carpule is 2 mL but how much solution is actual in the carpule?

Answer 10

0.2 mL removed because of the stopper so 1.8 mL of solution in the carpule

Question 11

What part of of the carpule does the harpoon and needle enter into?

Answer 11

Harpoon - rubber stopper
Needle - diaphragm