Deck 35: Impressions,study Casts,and Oral Stents

Question 1

Why would a dental hygienist recommend nightguard therapy to a patient?

A) To increase practice production
B) To prevent a malpractice lawsuit
C) To protect the patient from health risk
D) To help the patient avoid sports injury
E) To maintain good public relations

Answer 1

To protect the patient from health risk

Question 2

An alginate impression is disinfected with an Occupational Safety and Health Administration-approved disinfectant after the impression procedure is complete.This is to ensure that the diagnostic casts can be handled without gloves.

A) Both the statement and the reason are correct,and they are related.
B) Both the statement and the reason are correct,but they are not related.
C) The statement is correct,but the reason is not.
D) The statement is not correct,but the reason is accurate.
E) Neither the statement nor the reason is correct.

Answer 2

Both the statement and the reason are correct,and they are related.

Question 3

What type of reaction occurs when gypsum products solidify?

A) Galvanic
B) Physical
C) Exothermic
D) Mechanical

Answer 3

Exothermic

Question 4

How does the dental hygienist recognize bruxism?

A) By observing the patient while he or she talks
B) By observing the patient while he or she sleeps
C) By recognizing nervous behaviors
D) By recognizing wear facets and abfractions
E) By asking the patient about caffeine consumption

Question 5

Tooth-whitening stents deliver carbamide peroxide or hydrogen peroxide gels for tooth bleaching.All dentist-dispensed and home-use tooth-whitener gels require an oral stent for bleach delivery.

A) The first statement is true,but the second statement false.
B) The first statement is false,but the second statement is true.
C) Both statements are true.
D) Both statements are false.

Question 6

All of the following are oral stents except which one?

A) Home fluoride trays
B) Tooth-whitening trays
C) Palatal protective devices
D) Radon seed delivery devices
E) Mouth guards

Question 7

All of the following are uses for gypsum products except one.Which is the exception?

A) Study models
B) Diagnostic casts
C) Denture construction
D) Bite registration
E) Orthodontic retainer construction

Question 8

Oral stents are devices used for a variety of dental and medical procedures.Oral splints are devices used to stabilize oral structures.

A) The first statement is true,but the second statement false.
B) The first statement is false,but the second statement is true.
C) Both statements are true.
D) Both statements are false.

Question 9

What is of utmost importance to avoid when mixing alginate?

A) Spilling the material
B) Spatulation of product and water
C) Breathing the powder
D) Water/powder ratio
E) Touching it

Question 10

Which of the following is the best way to store an alginate impression when it cannot immediately be poured in a gypsum product?

A) Wrapped in dry paper towels
B) Wrapped in wet paper towels
C) Unwrapped in a humidor
D) No special storage is required.

Question 11

A grainy-looking alginate impression is the result of which of the following?

A) Excessive water
B) Insufficient water
C) Cool water
D) Hot water

Question 12

An alginate impression that tears easily is the result of which of the following?

A) Excessive water
B) Insufficient water
C) Cool water
D) Hot water

Question 13

Plaster and dental stone are gypsum dental products with the chemical name of which of the following?

A) Calcium sulfate dihydrate
B) Calcium sulfate hemihydrate
C) Calcium pyrophosphate
D) Calcium alginate

Question 14

An alginate impression that solidifies too quickly is the result of which of the following?

A) Excess water
B) Insufficient water
C) Cool water
D) Warm water

Question 15

A diagnostic cast that has teeth broken during removal of the impression is the result of which of the following?

A) Movement of cast during setting time
B) Contaminated gypsum product
C) Premature removal of impression
D) Incorrect water temperature

Question 16

Which of the following factors related to impression tray selection is most relevant when irreversible hydrocolloid impressions are taken?

A) Tray composition
B) Tray lubrication
C) Tray symmetry
D) Tray extension
E) Lip retraction procedures

Question 17

Which of the following waxes is most commonly used to make a bite registration for diagnostic casts?

A) Baseplate wax
B) Sticky wax
C) Utility wax
D) Boxing wax
E) Inlay wax

Question 18

All of the following devices are oral splints except which one?

A) Mouth guards
B) Home fluoride trays
C) Nightguards
D) Sleepguards
E) Surgical stents

Question 19

A properly fitting mouth guard should do which of the following?

A) Cover the palate.
B) Cover the crowns of the teeth.
C) Fit to the depth of the vestibule.
D) Be compounded in the mouth.

Question 20

Which of the following waxes is used for adapting stock trays?

A) Corrective wax
B) Sticky wax
C) Utility wax
D) Boxing wax
E) Inlay wax

Question 21

All of the following are sequelae of bruxism except which one?

A) Abrasion
B) Abfraction
C) Attrition
D) Headaches
E) TMJ disorders

Question 22

Which of the following sports does not require the use of a mouth guard?

A) Swimming
B) Football
C) Boxing
D) Skating
E) Tennis

Question 23

All of the following are nonsurgical therapies for bruxism except which one?

A) Biofeedback
B) Drug therapy
C) Physical therapy
D) Equilibration therapy
E) Psychotherapy

Question 24

Which of the following best describes the use of sleepguards?

A) Orthopedic device used to reposition the mandible
B) Oral device used to treat bruxism
C) Oral appliance used to protect the mandible
D) Oral device used to deliver home fluoride
E) Orthodontic appliance used to reposition teeth

Question 25

Periodontal splints are devices that should do which of the following?

A) Prevent the tongue from obstructing the oropharynx.
B) Cover donor sites after soft-tissue grafting.
C) Protect teeth from clenching and grinding.
D) Stabilize mobile teeth.