Module 8

Question 1

Lowest effective dose should be used for

Answer 1

1. Elderly
2. Children
3. Medically compormised

Question 2

MRD is based on what two things

Answer 2

1. Maximum dosage per appt
2. Pt. weight

Question 3

MOA of topical anesthetics

Answer 3

Decrease NA ion permeability = decrease in depolarization = blockage in nerve impulse

Question 4

Topicals block nerve conduction at _________ __________ ______________.

Answer 4

mucous membrane surface

Question 5

What is the range of effective concentration for topicals?

Answer 5

0.2% to 20%

Question 6

The choice of method you choice to deliver the TA should be based on what/who?

Answer 6

the individual pt

Question 7

What spray is there an association with methemoglobinemia?

Answer 7

Benzocaine sprays

Question 8

Who long should the topical be placed at the site for?

Answer 8

2-3 min

Question 9

What is the anesthesia tissue depth for TA?

Answer 9

2-3 mm

Question 10

Benzocaine (hurricaine) is a ester. (T/F)

Answer 10

True

Question 11

Benzocaine has a rapid onset of

Answer 11

30 sec - 2 min

Question 12

What is benzocaine duration of action?

Answer 12

5 - 15 min

Question 13

What concentration of benzocaine is most commonly used in dentistry?

Answer 13

20%

Question 14

Benzocaine metabolism and excretion?

Answer 14

Metabolism = plasma + some liver
Excretion = kidneys

Question 15

Benzocaine has no MRD. (T/F)

Answer 15

True

Question 16

Benzocaine: Pregnancy = category _______ and lactation ________

Answer 16

Pregnancy = category C and lactation unknown safety

Question 17

What TA is a good choice for a ester allergy?

Answer 17

Lidocaine- b/c its a amide

Question 18

Benzocaine, lidocaine, cetacaine all have a ________ toxicity.

Answer 18

very low

Question 19

Lidocaine onset is:

Answer 19

2 - 10 min

Question 20

Lidocaine duration of action is

Answer 20

15-45 min

Question 21

What concentration of Lidocaine TA is used?

Answer 21

2% to 5%

Question 22

Lidocaine metabolism and excretion

Answer 22

Metab = liver
Excretion = kidneys

Question 23

What is the MRD safely for lidocaine?

Answer 23

200 mg

Question 24

Lidocaine Pregnancy = category _______ and lactation ________

Answer 24

Pregnancy = category B and lactation small amount enters breast milk

Question 25

Cetacaine = ______ + _______ + ________

Answer 25

benzocaine + butamben + tetracaine

Question 26

Is cetacaine an ester or an amide?

Answer 26

Ester

Question 27

Cetacaine has a rapid onset of:

Answer 27

30 seconds

Question 28

Cetacaine duration of action is

Answer 28

30 - 60 min

Question 29

What concentrations are in cetacaine

Answer 29

Benzocaine (14%) + Butamben (2%) + Tetracaine (2%)

Question 30

Cetacaine metabolism and excretion

Answer 30

metabolism = plasma + some liver
excretion = klidneys

Question 31

MRD for cetacaine

Answer 31

200 mg

Question 32

Cetacaine = pregnancy category __ lactation ____

Answer 32

pregnancy category C lactation used caution

Question 33

Concentration TA are _______ than injectable LAs.

Answer 33

higher

Question 34

There is no vasoconstrictors in TA which increase the absorption rate and increases toxicity. (T/F)

Answer 34

True

Question 35

What are the 5 toxic and adverse rxns?

Answer 35

1. irritation at the sit of application
2. sloughing
3. taste alteration
4. CNS effect (excitation to depression)
5. CV effect (decrease in HR and BP lead to cardiac arrest)

Question 36

(T/F) Increase concentration are need for TA compared to LA.

Answer 36

True which increase the toxicity of TA