Local Anesthesia Ch 6 quiz -Evolve

Which of the following is a eutectic mixture that will thicken into a gel once inserted into a periodontal pocket, relieving pain associated with nonsurgical periodontal therapy?

Oraqix (2.5% lidocaine/2.5% prilocaine gel)

Topical anesthetics are available in a variety of forms. Which method of delivery is most likely to produce a toxic reaction?

Spray

Which topical anesthetic has the longest average duration?

Tetracaine hydrochloride

The FDA has released a Public Health Advisory alerting consumers to the potential risk of life-threatening or fatal reactions to over-the-counter topical anesthetics. Some of these over-the-counter topical anesthetics are available in concentrations twice the strength of those used in the dental office.

The first statement is true; the second statement is false

Which of the following is NOT an appropriate use for topical anesthesia?

To achieve pulpal anesthesia prior to restorative dental procedures

To achieve the optimal anesthetic effect, topical anesthesia should remain at the site of application for _______.

1 to 2 minutes

Topical anesthesia will anesthetize the affected area _______ into the tissue.

2 to 3 mm

A patient who has just been administered Oraqix gel (2.5% lidocaine and 2.5% prilocaine) can expect a comfortable duration of anesthesia of approximately _______.

20 minutes

Oraqix gel (2.5% lidocaine and 2.5% prilocaine) produces an anesthetic effect within ____________.

30 seconds

Of the following patients, which is most likely to have a negative reaction to topical anesthetic?

A child

Which topical anesthetic has the most rapid onset of action?

Benzocaine

Topical anesthetics have a lower concentration of anesthetic than their injectable counterparts. This is necessary because some topical anesthetics contain a vasoconstrictor.

Both statements are false.

Topical anesthesia is available in many different forms: liquid, gel, spray, and patch. Topical anesthesia distributed in single dose applications decreases the possibility of cross-contamination.

Both statements are true

A toxic overdose of topical anesthetic may result in which of the following?

Bradycardia

Which topical anesthetic is not classified as an ester or an amide, but as a ketone?

Dyclonine hydrochloride

Which of the following are symptoms of a localized reaction to topical anesthetic?

Irritation, burning, and stinging at the site of application AND tissue sloughing or discoloration and temporary change in taste perception

Which of the following is NOT an ideal property of an oral topical anesthetic?

It produces dependency on repeated use

Drying the mucosa with 2 × 2 gauze, prior to the application of topical anesthesia, assists in _______.

accurate placement of the topical anesthetic AND increasing the visibility

Allergic reactions to topical anesthetic are _______.

rare

Mild allergic reactions to topical anesthetic can include _______, _______, and _______.

swelling, raised welts, itching