Chapter 6 Topical Anesthetic Agents

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1-2 minutes

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

2-3 mm

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

higher

Topical anesthetics have a _________ concentration of anesthetic than their equivalent in an injectable form. Topical anesthetics do not contain a vasoconstrictor.

Oraqix

Which of the following is a eutectic mixture (of lidocaine and prilocaine) that will thicken into a gel once inserted into a periodontal pocket, relieving pain associated with nonsurgical periodontal therapy.

Tetracaine hydrochloride

Which topical anesthetic has the longest average duration that has an average duration of 45 minutes?

Benzocaine

Which topical anesthetic has the most rapid onset of action, that usually takes place within 30 seconds?

Dyclonine hydrochloride

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

20 minutes

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 _______.

rare

Allergic reactions (even to the esters bezocaine and tetracaine) to topical anesthetic are _______.

cardiac arrest

Bradycardia (heart beating too slowly) and hypotension are cardiovascular consequences in a toxic overdose of topical anesthetic and may, in some cases, lead to ___________.

topical

Children, the elderly, and medically compromised patients are most susceptible to adverse reactions to ________ anesthetic.

systemic

Dizziness, tinnitus and involuntary muscular activity are _________ reactions to topical anesthetic.


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