Question 1

What is the difference between generic names and proprietary names of local anesthetics?

Accepted Answer

Proprietary names are brand names or trademark names under which a product is marketed.A generic name is a nonproprietary name.

Question 2

Name the only long-lasting local anesthetic available for use in dentistry.

Accepted Answer

Bupivacaine

Question 3

Name the local amide anesthetic agent that has the highest dissociation constant and explain what this high dissociation constant means.

Accepted Answer

Bupivacaine has the highest pKa,which meAnswer that it has the slowest onset of action but has a duration that almost doubles the duration of lidocaine.

Question 4

Name the local anesthetic that has the shortest half-life and the lowest risk for systemic toxicity.

Accepted Answer

The answer of Name the local anesthetic that has the...

Question 5

Epinephrine is the most commonly used anesthetic in dentistry.

Accepted Answer

Correct: Lidocaine is the most commonly used anesthetic in dentistry.

Question 6

Articaine cartridges of local anesthetic contain 1.7 ml of solution.

Accepted Answer

Articaine cartridges typically contain 1.7 ml of solution, although there may be variations depending on the manufacturer or specific product.

Question 7

What local anesthetic agents would be a good choice to use when a vasoconstrictor is contraindicated?

Accepted Answer

The answer of What local anesthetic agents would be a...

Question 8

Intermediate-action anesthetics are most commonly used for regular restorative dentistry and nonsurgical periodontal therapy.

Accepted Answer

Intermediate-action anesthetics, such as lidocaine and articaine, are commonly used for regular restorative dentistry and nonsurgical periodontal therapy.

Question 9

Currently,no anesthetic cartridges contain methlylparaben.

Accepted Answer

After safety concerns were raised, methylparaben and propylparaben were removed from most anesthetic cartridges by manufacturers.

Question 10

What is the solution that was added to the cartridge of local anesthetic to prevent bacterial growth?
A) Vasoconstrictor preservative
B) Sodium hydroxide
C) Sodium chloride
D) Methylparaben

Accepted Answer

Methylparaben is the solution that was added to the cartridge of local anesthetic to prevent bacterial growth.

Question 11

Name the local anesthetic that produces an intermediate duration when administered as a block injection.

Accepted Answer

The answer of Name the local anesthetic that produces an...

Question 12

Which of the following questions should the dental hygienist consider prior to administering local anesthetic to a patient?
1) What is the dental or dental hygiene care plan?
2) What is the need for post-treatment pain control after the procedure?
3) What is the patient's level of anxiety?
4) Is hemostasis needed for restorative dentistry?
5) What medication is the patient currently taking?
A) 1, 2, 3, 4, 5
B) 1, 2, 3, 5
C) Some other combination
D) All of the above

Accepted Answer

Questions 1,2,3,and 5 are necessary questions that the dental hygienist should consider prior to the administering of local anesthetic to a patient.

Question 13

An anesthetic solution of 1:100,000 epinephrine is twice as effective in controlling pain as a solution of 1:50,000 epinephrine.

Accepted Answer

Correct: There is no difference in pain control between a 1:50,000 and 1:100,000 formulation of epinephrine.

Question 14

Which two local anesthetic agents have the least vasodilating properties?

Accepted Answer

The answer of Which two local anesthetic agents have the...

Question 15

What is the solution that is added to the cartridge of local anesthetic to prevent oxidation of the vasoconstrictor called?
A) Vasoconstrictor preservative
B) Sodium hydroxide
C) Sodium chloride
D) Methylparaben

Accepted Answer

The vasoconstrictor preservative is the solution that is added to the cartridge of local anesthetic to prevent oxidation of the vasoconstrictor.

Question 16

Sodium chloride is a buffer creating an injectable solution that is isotonic.

Accepted Answer

Sodium chloride can act as a buffer and when used to create an injectable solution, it is isotonic, meaning it has the same concentration of solutes as the surrounding cells and fluid. Therefore, the statement is true.

Question 17

Among local anesthetics procaine has the highest percentage of protein binding and is the most lipid soluble.

Accepted Answer

Correct: Bupivacaine has the highest percentage of protein binding and is the most lipid soluble.

Question 18

Which of the following local anesthetics,without vasoconstrictors,are useful in dentistry?
A) Lidocaine
B) Mepivacaine
C) Prilocaine
D) All of the above

Accepted Answer

All of the above.Lidocaine,mepivacaine,and prilocaine all have usefulness in dentistry even without the addition of vasoconstrictors.

Question 19

Inflamed tissue experiences an increase in vascularity,slowing the onset of anesthetic action and decreasing the duration of anesthetic action; however,in healthy tissues the onset of action and the duration of action are more predictable.

Accepted Answer

Inflamed tissue has increased blood flow, which can cause anesthetic to be metabolized or taken away from the site more quickly, leading to shorter duration of action. However, healthy tissue has more predictable onset and duration of action.

Question 20

What is the solution that is added to the cartridge of local anesthetic that can trigger bronchospasms?
A) Vasoconstrictor preservative
B) Sodium hydroxide
C) Sodium chloride
D) Methylparaben

Accepted Answer

The vasoconstrictor preservative is the solution that is added to the cartridge of local anesthetic that can trigger bronchospasms.

Quiz 5: Local Anesthetic Agents