Chapter 9 Evolve and Review Questions

Which of the following needle gauges has the largest lumen diameter?

25

what are the two commonly used needle lengths for intraoral injections

25 mm and 30 mm

What type of needle is recommended to safely and effectively administer the inferior alveolar nerve block?

A long, 25-gauge needle

All are ways that increase the risk of needle breakage EXCEPT one. Which one is the EXCEPTION?

using a 25-gauge needle

All are acceptable ways to recap a needle EXCEPT one. Which one is the EXCEPTION?

using fingers to recap the needle when the needle has not entered the patient's mouth

To maximize patient comfort and minimize tissue trauma, the needle should be changed after _______ injections on the same patient.

3 to 4

which of the following intraoral needle gauges used in dentistry are listed from smallest to largest

30 , 27, 25

Which identifying mark is required by the ADA for all local anesthetic cartridges?

A standardized color-coded band on the plastic label

Placing the local anesthetic cartridge in alcohol or sterilization solutions can cause ________.

All of the above (contamination of the local anesthetic solution, corrosion of the aluminum cap, a burning sensation during the injection)

the bevel of the needle should

Be turned toward the bone

A bubble in the cartridge that is larger than 2 mm is harmlessly produced by nitrogen gas during the manufacturing process. A cartridge with a large bubble (>2 mm) can be used without complication.

Both statements are false.

Harpoon disengagement may occur due to which operator error?

Excessive pull during aspiration and Failure to properly engage the harpoon during setup

Gauze 2×2 squares are a helpful supplement to the anesthetic armamentarium. Which of the following is NOT a function of a gauze 2×2?

Pressure anesthesia

what are characteristics of topical anesthetics

Provide soft tissue anesthesia

As you are about to administer an injection, your needle tip inadvertently touches the patient's disposable bib (clean but not sterile). What should you do next?

Recap the needle with the one-hand scoop method, discard it and replace it with a new, sterilized needle. Proceed in administering the local anesthesia.

what is the definition of the needle bevel

The angled point or tip of the needle

Patient comfort is minimized through the use of a sharply beveled needle. When administering local anesthesia, the bevel of the needle should face the bone.

The first statement is false; the second statement is true.

After arriving at the deposition site, you decide to redirect your needle to achieve effective anesthesia. Which of the following is an appropriate action?

Withdraw the needle completely, change the direction of the needle, penetrate, and readvance to the target location.

what is the most important improvement that has been made to the local anesthetic syringe?

addition of the aspirating harpoon

the color-coded band on the anesthetic cartridges identifies what?

anesthetic drug inside the cartridge

all of the following cause a burning sensation when the anesthetic is injected into just tissue except one. Which is the exception?

buffered anesthetic

which of the following is a way to decrease pain during injection

change needle after 3 to 4 tissue penetrations

The syringe designed to deliver a "virtually painless" injection of local anesthesia is the

computer-controlled anesthetic delivery device (CCLAD).

computer-controlled anesthetic devices are benficial because they deliver exact amounts of anesthetic at a controlled rate. they are less ergonomic for the clinician.

first statement is true, second is false

Larger gauge needles have what advantages over smaller gauge needles?

greater accuracy and increased injection success

The _________ is a sharp tip attached to the internal end of the piston that embeds into the cartridge's rubber stopper.

harpoon

which of the following are important criteria for an acceptable local anesthetic syringe

inexpensive, self-contained, and able to withstand repeated sterilization without damage

Routine maintenance of a reusable syringe includes _____________.

inspection and replacement of a dull or bent harpoon

A needle with a ____________ is recommended for its ability to provide less deflection, greater accuracy, less needle breakage, and a more accurate aspiration.

larger gauge (25)

When breach-loading a cartridge into the syringe, the rubber stopper should _______.

load first

. Pulling back on the thumb ring provides ____________ and produces an aspiration

negative pressure

It is safe to insert the needle to the hub. The hub of the needle is the strongest part of the needle.

neither statement nor reason is correct

Warming the anesthetic agent is recommended for patient comfort because it can activate the vasoconstrictor. This can cause an increase in the duration of the action.

neither the statement or reason is correct

A _________ syringe is primarily used for PDL injections of single mandibular teeth where tissue resistance is pronounced.

pressure

How should a clinician properly dispose of anesthetic needles?

recapping using the scoop method and disposal in an approved sharps container

If the harpoon disengages during an aspiration, the clinician should

remove the syringe from the patient's mouth, remove the needle, and reengage the harpoon into the rubber stopper.

which of the following indicates that the cartridge should be used

small bubbles less than 2 mm

The American Dental Association has set forth criteria for the acceptance of local anesthetic syringes. Which of the following is NOT consistent with the ADA's standards?

syringe must be disposable

what is the purpose of applying negative pressure to the harpoon

to evaluate whether the needle is within a blood vessel

what is optional when preparing to give an intraoral injection

topical antiseptic