Deck 6: Finishing, Polishing, and Cleansing Materials

Question 1

Which of the following abrasive agents commonly used in dentistry for polishing and cleansing is derived from diatoms?

A) Kieselguhr
B) Calcite
C) Pumice
D) Rouge

Answer 1

Kieselguhr

Question 2

Which of the following types of abrasive materials found in prophy paste, wear during use but continue to abrade, producing an increasingly smoother surface?

A) Perlite
B) Silicon dioxide
C) Zirconium silicate
D) Diatomaceous silicon dioxide
E) Sodium-potassium-aluminum silicate

Answer 2

Perlite

Question 3

Which of the following materials is the most difficult to remove from a tooth surface during tooth prophylaxis?

A) Acquired pellicle
B) Food debris
C) Calculus
D) Plaque

Answer 3

Calculus

Question 4

Which of the following restorative materials is most subject to wear during a prophylactic procedure?

A) Resin composites
B) Dental amalgam
C) Cast gold
D) Ceramic

Question 5

Which technique will produce the smoothest surface on a composite restoration?

A) Curing against a polyester matrix
B) Twelve-blade carbide burs
C) Diamond stones
D) Green stones
E) White stones

Question 6

Why are finishing and polishing techniques so important in restorative dentistry?

A) Remove excess material and to smooth roughened surfaces
B) Remove plaque and calculus from restorations
C) Burnish the margins of gold castings
D) Work-harden metal surfaces

Question 7

For an abrasive, the higher the speed, the greater the frequency per unit of time the particle contacts the surface. In a clinical situation it is easiest to control pressure rather than speed to vary the rate of abrasion.

A) Statement 1 is correct; statement 2 is correct.
B) Statement 1 is correct; statement 2 is incorrect.
C) Statement 1 is incorrect; statement 2 is correct.
D) Statement 1 is incorrect; statement 2 is incorrect.

Question 8

Some fast-setting, high-copper amalgams can be polished about 8 to 12 minutes after placement with a _____ paste of extra-fine _____ and water in a rubber cup.

A) dry; silex
B) dry; tin oxide
C) creamy; silex
D) creamy; tin oxide

Question 9

After polishing, a denture should be stored _____ until delivery to the patient.

A) dry
B) moist
C) in glycerin
D) in ultrasonic cleaning solution

Question 10

Which of the following represents an appropriate sequence for finishing and polishing an acrylic denture base?

A) Pumice slurry, finishing bur, tripoli
B) Pumice slurry, tripoli, finishing bur
C) Finishing bur, tripoli, pumice slurry
D) Finishing bur, pumice slurry, tripoli
E) Tripoli, finishing bur, pumice slurry

Question 11

Which types of materials are used for finishing and polishing?

A) Surfactants
B) Humectants
C) Astringents
D) Abrasives

Question 12

Which abrasive disks are beige?

A) Aluminum oxide
B) Silicon carbide
C) Garnet
D) Cuttle

Question 13

Which of the following procedures are recommended in order to maintain infection control when using pumice to polish acrylic denture base material?

A) Change pumice daily.
B) Use a separate pumice pan for each patient.
C) Mix pumice with a liquid disinfectant such as 5 parts sodium hypochlorite to 100 parts distilled water.
D) A, B, and C are all recommended.
E) Only A and C are recommended.

Question 14

Which of the following statements is true when using abrasives?

A) The area being finished and polished should be rinsed with each successive change of abrasive.
B) Dry polishing will increase the danger of overheating the surface.
C) Dry polishing will increase the efficiency of the abrasive.
D) Both A and C are correct statements.

Question 15

Which types of abrasives are generally hard, coarse abrasives used primarily for the development of desired contours of a restoration or tooth preparation and for the removal of gross irregularities on a surface?

A) Cleansing
B) Finishing
C) Polishing
D) A and B
E) B and C

Question 16

What is the purpose of a humectant in toothpaste?

A) Prevent dehydration
B) Function as a binder
C) Prevent dental caries
D) Function as an abrasive
E) Reduce the rate of formation of supragingival calculus

Question 17

Which of the following would represent an appropriate sequence for finishing and polishing an amalgam restoration?

A) Finishing bur, green stone, tin oxide, silex
B) Green stone, finishing bur, silex, tin oxide
C) Green stone, finishing bur, tin oxide, silex
D) Tin oxide, silex, green stone, finishing bur

Question 18

Which technique will produce the smoothest surface of a gold casting?

A) Chamois
B) Fine cuttle disk
C) Crocus disk with rouge
D) Polished wax, pickled casting

Question 19

Sand disks should not be used interchangeably with _____ disks.

A) cuttle
B) diamond
C) silicon carbide
D) aluminum oxide

Question 20

Which of the following is not one of the criteria for an ideal denture cleanser?

A) Be stable during storage
B) Preferably be bactericidal and fungicidal
C) Be able to remineralize worn acrylic denture teeth
D) Be able to attack or dissolve both the organic and inorganic portions of denture deposits

Question 21

Which of the following is not a recommended type of denture cleaner?

A) Abrasive creams
B) Alkaline perborates
C) Fluoridated toothpaste
D) Alkaline hypochlorites

Question 22

What are the three categories of abrasives used in dentistry?

A) Tin oxide and rouge
B) Light, medium, and coarse pumice
C) Smoothing, wearing, and adhering
D) Finishing, polishing, and cleansing

Question 23

Home bleaching agents typically contain 10% to 22% _____ peroxide.

A) carbamide
B) hydrogen
C) calcium
D) sodium

Question 24

Which of the following choices represent(s) an effective means of improving denture cleanliness?

A) Fifteen-minute soaking
B) Ultrasonic vibration
C) Chemical cleansers
D) Brushing
E) C and D

Question 25

When using an abrasive material how will the amount of pressure exerted affect the outcome?

A) Cause the material to fracture if excessive
B) Cause the finish to be glossy as it increases
C) Cause deeper grooves in the finished restoration
D) Eliminate intrinsic stains in the surrounding enamel

Question 26

Which factor affects the rate of abrasion?

A) Rate of speed
B) Type of material
C) Depth of the material
D) Number of filler particles

Question 27

Which of the following is true about rag wheels and pumice?

A) Disposed of after each patient use
B) Sterilized before the next patient use
C) Used on the tongue side of the prosthetic
D) Only A and B
E) All of the above

Question 28

At what point can high-copper amalgams be polished?

A) Should not be polished
B) Can be polished after 8 to 12 minutes
C) Should be polished after 24 hours

Question 29

Which of the following methods would not be used to clean a denture with a soft liner?

A) Cotton under cold water
B) A brush with hard, stiff bristles
C) A soaking type of denture cleanser
D) An organic solvent such as chloroform
E) Immersion in sodium hypochlorite followed by light brushing

Question 30

Which of the following techniques are recommended for cleaning dentures and prosthetic appliances fabricated from base metals such as cobalt-chromium alloy?

A) Light brushing
B) Soaking in hot water
C) Immersion in a solution containing 1 teaspoon of a hypochlorite (Clorox) and 2 teaspoons of a glassy phosphate (Calgon) in one-half glass of water
D) A, B, and C
E) A and C

Question 31

What is the purpose of using glycerin with polishing agents?

A) Maintains consistency
B) Improves polish
C) Provides gloss
D) Evaporates

Question 32

Which of the following cleaning techniques would be most effective for cleaning stain and plaque from dentures?

A) A 15-minute soak daily with a chemical tablet
B) Using a toothbrush and fluoridated toothpaste
C) Periodic immersions in an ultrasonic cleaner
D) Using a denture brush and denture paste

Question 33

Which of the following statements is true of bleaching agents?

A) They will adversely affect restorative materials such as gold alloys, amalgam, microfilled composites, or porcelain.
B) Some microhybrid composites, hybrid ionomers, and glass ionomers have been roughened slightly by bleaching gels.
C) Bleach should come in contact with dentin in order to bleach the yellow shade.
D) Yellow, orange, or light brown stains are the least responsive to bleaching.

Question 34

Which statement is correct about the finish on a glass ionomer restoration?

A) Rougher than a compomer
B) The same as composite resin
C) Smoother than a compomer
D) Smoother than composite resin

Question 35

Which of the following is true about diamond stones?

A) Chips added to a binder
B) Cannot produce fine detail
C) Formed into disks, cups, or points
D) A, B, and C are all correct.
E) Only A and C are correct.

Question 36

Dentifrice products that contain pumice and quartz show lower cleansing values. Dentifrice products that contain pumice and quartz show lower abrasion to tooth surfaces.

A) Statement 1 is correct; statement 2 is correct.
B) Statement 1 is correct; statement 2 is incorrect.
C) Statement 1 is incorrect; statement 2 is correct.
D) Statement 1 is incorrect; statement 2 is incorrect.

Question 37

Which of the following is not part of the guidelines for in-office bleaching?

A) Patients can be processing while the dental team is seeing other patients.
B) The patient should have a comprehensive exam prior to the procedure.
C) The patient should have a complete prophylaxis prior to the procedure.
D) The patient may need local anesthetic for sensitivity.
E) Both A and D are correct.

Question 38

When are fine abrasives used?

A) Reduce scratches
B) Contour the restoration
C) Remove excess material
D) Provide detailed anatomy

Question 39

Which statement is true regarding the smooth surface of a restoration?

A) Allows stain formation
B) Reduces retention of bacteria
C) Increases retention of bacteria
D) Produces a dull, nonreflective appearance

Question 40

What are the side effects of tooth whitening procedures?

A) Lightening esthetic restorations
B) Sloughing of the gingiva
C) Tooth hypersensitivity
D) All of the above
E) Only B and C

Question 41

Whitening agents are effective in removing which type(s) of stain or discoloration?

A) Tetracycline stain
B) Black line stain
C) Decalcification
D) Coffee stain

Question 42

Compare and contrast in-office and home whitening materials.

Question 43

Explain the guidelines for helping a patient choose the correct dentifrice for his/her needs.