Wilkins chapter 28

1. Which of the following is not a local self-care method?

a) Toothbrushing

b) Ultrasonic scaler

c) Rinsing

d) Irrigating

e) Dentifrices

B

2. The treatment of disease by means of chemical substances or pharmaceutical agents is commonly seen in dentistry. What do you call a chemical that is used for therapeutic reasons in the treatment of disease?

a) Humectant

b) Astringent

c) Irrigant

d) Chemotherapeutic

e) Detergent

D

3. Which agent is the most effective in commercial dentifrices for the reduction of dentin hypersensitivity?

a) Triclosan

b) Chlorhexidine

c) Potassium nitrate

d) Zinc chloride

e) Stannous fluoride

C

4. Which of the following statements about triclosan are not true?

a) Triclosan is the primary agent that has shown efficacy in reducing gingival inflammation.

b) Triclosan has been shown to inhibit inflammatory mediators

c) Triclosan has shown significant reductions in supragingival biofilm formation

d) Triclosan combined with a copolymer increases the substantivity

e) Triclosan is the primary agent that has shown efficacy in reducing dentin hypersensitivity

E

5. Which of the following active ingredients is found in an anticalculus dentifrice?

a) Zinc chloride

b) Sodium citrate

c) Strontium chloride

d) Potassium nitrate

A

6. Which of the following is not a type of therapeutic dentifrice?

a) Baking soda-peroxide-fluoride dentifrice

b) Antimicrobial dentifrice

c) Fluoride-containing dentifrice

d) Baking soda whitening dentifrice

D

7. In a dentifrice, what is the function of the humectant?

a) Prevents separation of ingredients

b) Prolongs a product's shelf life

c) Maintains the consistency of the product

d) Retains moisture

e) Produces a smooth tooth surface

D

8. Your patient has just informed you that his previous hygienist told him that swishing vigorously would get the antibacterial rinse into his 5-mm pockets. How far subgingivally can rinsing deliver an agent?

a) 8 mm b) 6 mm c) 4 mm d) 2 mm

D

9. What is the most effective antimicrobial and antigingivitis agent available for clinical use?

a) chlorhexidine

b) Acidulated phosphate fluoride

c) Essential oils

d) Stannous fluoride

e) Oxygenating agent

A

10. Chlorhexidine is safe and effective for use in all of the following, except:

a) biofilm control and prevention.

b) reducing Streptococcus mutans.

c) long-term therapy for individuals with poor home care.

d) inhibiting and reducing the development of gingivitis.

e) postsurgical enhanced would healing.

C

11. Your patient just had periodontal surgery a week ago. She was instructed to use a chlorhexidine rinse each night before bed immediately after brushing., What, if anything, is wrong with these instructions?

a) Nothing, the instructions are correct and recommended.

b) Chlorhexidine should never be used before bed.

c) Chlorhexidine should not be used immediately after brushing.

d) Chlorhexidine is not recommended for patients having periodontal surgery.

e) Chlorhexidine is only used by a professional in a dental office.

C

12. Which of the following agents is currently available in a dentifrice in the United States?

a) Chlorhexidine b) Alcohol

c) Triclosan d) Hydrogen peroxide

C

13. Phenolic compounds do which of the following?

a) Disrupt the bacterial cell wall

b) Interfere with bacterial glycolysis

c) Promote oral wound healing

d) Reduce caries e) Inhibit alcohol absorption

A

14. Which statement is not a benefit of mouthrinses?

a) They reduce the number of intraoral microorganisms/

b) They provide biofilm control.

c) They aid in the prevention of gingivitis. d) They remove intrinsic stains.

e) They contribute to malodor control.

D

15. Which of the following dental products is regulated by the FDA?

a) Infection control products

b) Power and manual toothbrushes

c) Prosthetic and restorative materials

d) Diagnostic test kits

e) Chemotherapeutics

B

16. All of the following statements concerning triclosan are true, except:

a) it is a bisphenol.

b) it is effective against both Gram-negative and Gram-positive viruses.

c) it has low toxicity.

d) it causes bacteriolysis.

B

17. The first caries-preventive dentifrice contained:

a) triclosan

b) potassium nitrate.

c) stannous fluoride.

d) chlorhexidine.

C

18. Which of the following is not a "tarter-control" dentifrice ingredient?

a) Zinc salts

b) Sodium hexametaphosphate

c) Potassium nitrate

d) Triclosan

C

19. What is the purpose of a humectant? a) Lower surface tension

b) Polishing agent

c) Thickener

d) Moisture retainer

D

20. All of the following are true concerning quaternary ammonium compounds, except:

a) they are anionic agents.

b) they rupture cell walls.

c) they alter cytoplasm.

d) they have low substantivity.

A

21. Which of the following ingredients in a commercial mouthwash enhances flavor impact and contributes to cleansing?

a) Alcohol

b) Surfactant

c) Preservative

d) All of these are correct.

A

22. True or False? Oxygenating agents alters bacterial cell membrane, decreasing permeability.

False

23. Substantivity means the ability of an agent to bind to the pellicle, tooth surface, and soft tissue and be released over an extended period of time with the retention of its _____.

Potency