Deck 6: Finishing, polishing, and Cleansing Materials

Question 1

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

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

Answer 1

A, B, and C are all recommended.

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

Answer 2

Perlite

Question 3

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

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

Answer 3

in water

Question 4

_____ abrasive disks are beige.

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

Question 5

The smoothest surface on a composite restoration is produced by:

A) diamond stones.
B) twelve-blade carbide burs.
C) curing against a polyester matrix.
D) green stones.
E) white stones.

Question 6

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 7

The smoothest surface of a gold casting can be produced with a:

A) chamois.
B) fine cuttle disk.
C) crocus disk with rouge.
D) polished wax, pickled casting.

Question 8

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 9

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

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

Question 10

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

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

Question 11

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

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

Question 12

Finishing and polishing techniques are meant to:

A) remove plaque and calculus from restorations.
B) burnish the margins of gold castings.
C) remove excess material and to smooth roughened surfaces.
D) work-harden metal surfaces.

Question 13

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

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

Question 14

The materials used for finishing and polishing are primarily:

A) surfactants.
B) humectants.
C) astringents.
D) abrasives.

Question 15

Sand disks should not be used interchangeably with _____ disks.

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

Question 16

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 17

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 efficiency of the abrasive.
C) Dry polishing will increase the danger of overheating the surface.
D) Both A and C are correct statements.

Question 18

What is the purpose of a humectant in toothpaste?

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

Question 19

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

Question 20

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) Plaque
D) Calculus

Question 21

The three categories of abrasives used in dentistry are:

A) pumice, tin-oxide, and rouge.
B) finishing, polishing, and cleansing.
C) light, medium, and course.
D) smoothing, wearing, and adhering.

Question 22

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) Using a denture brush and denture paste
D) Periodic emersions in an ultrasonic cleaner

Question 23

The finish on a glass ionomer restoration is:

A) rougher than a compomer.
B) smoother than a compomer.
C) smoother than composite resin.
D) the same as composite resin.

Question 24

A rag wheel and pumice should be:

A) used on the tongue side of the prosthetic.
B) disposed of after each patient use.
C) sterilized before the next patient use.
D) only A and B.

Question 25

High-copper dental amalgam:

A) should not be polished.
B) can be polished after 8 to 12 minutes.
C) should be polished after 24 hours.

Question 26

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

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

Question 27

Side effects of tooth whitening procedures include:

A) sloughing of the gingiva.
B) lightening esthetic restorations.
C) tooth hypersensitivity.
D) all of the above.
E) only A and C.

Question 28

Diamond stones are:

A) created using diamond chips.
B) chips added to a binder.
C) formed into discs, cups, or points.
D) all of the above.

Question 29

The smooth surface of a restoration will:

A) reduce retention of bacteria.
B) increase retention of bacteria.
C) allow stain formation.
D) produce a dull, nonreflective appearance.

Question 30

The amount of pressure exerted when using an abrasive material will:

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

Question 31

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) Bleach should come in contact with dentin in order to bleach the yellow shade.
C) Some microhybrid composites, hybrid ionomers, and glass ionomers have been roughened slightly by bleaching gels.
D) Yellow, orange, or light brown stains are the least responsive to bleaching.

Question 32

The soft liner of a denture should be cleaned with:

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

Question 33

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) 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
C) Soaking in hot water
D) A, B, and C
E) A and C

Question 34

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) The first statement is true; the second statement is true.
B) The first statement is true; the second statement is false.
C) The first statement is false; the second statement is false.
D) The first statement is false; the second statement is true.

Question 35

Fine abrasives are used to:

A) remove excess material.
B) contour the restoration.
C) reduce scratches.
D) provide detailed anatomy.

Question 36

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

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

Question 37

The rate of abrasion is affected by the:

A) depth of the material.
B) rate of speed.
C) type of material.
D) number of filler particles.

Question 38

What is the purpose of using glycerin with polishing agents?

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