DHYG 312 Pre-Clinical Final Review Question and answers rated
A+ 2026/2027
1. 1. The maximum caries-inhibiting effect of fluoride is
E seen when there has been systemic exposure
prior to tooth eruption and which of the following?
a) Home use when caries are suspect
b) Professional application of APF fluoride
c) Professional application of neutral sodium fluoride
d) Continual use of fluoride supplements after
erup-tion
e) Frequent topical fluoride exposure throughout life
2. 2. Which of the following is not a posteruptive benefit B
of fluoride exposure?
a) It inhibits demineralization
b) It causes the development of shallower
occlusal grooves.
c)It enhances demineralization.
d) It interferes with the growth of baçteria.
e) It interferes with the metabolism of bacteria.
3. Which of the following enamel surfaces will absorb
C the most fluoride when exposed in the oral
environ-ment?
a) Sound enamel on the facial surface of #8
b) The palatal root of the maxillary first molar
c) Demineralized enamel on the facial surface of #30
d) Exposed enamel in the furcation area of #19
e) Enamel covered by a dental sealant
4. Which of the following chemicals would most likely be A
used in community water fluoridation?
a) Hydrofluorosilicie acid
b) Acidulated phosphate fluoride
, DHYG 312 Pre-Clinical Final Review
c)Stannous fluoride
d) Sodium monofluorophosphate
5. Which of the following systemic fluoride delivery C
methods would be considered most economical?
a) Dietary fluoride supplements
b) Naturally occurring in foods
c) Community water fluoridation
d) Professional fluoride treatment
e) Daily home rinse
6. You have a pregnant patient in the dental chair.
She
B said that her sister took fluoride supplements
while she was pregnant to help her child have
fewer cavities when his permanent teeth come in.
What should you tell this patient?
a) "That sounds like a great idea; keep it up!"
b) "The permanent teeth do not form until after
birth, so this will not help with the child's
permanent teeth."
c) "Good, but be sure to continue with the
supple-ments after delivery while nursing for
extra help."
d) "The fluoride can harm the fetus and should not
be taken while pregnant."
7. What is the maximum amount of NaF that can be C
dispensed per household at one time?
a) There is no limit to the amount dispensed
per household.
b) No more than 132 mg NaF (60 mg of fluoride)
c) No more than 264 mg NaF (120 mg of fluoride)
d) No more than 396 mg NaF (180 mg of fluoride)
8. B
, DHYG 312 Pre-Clinical Final Review
What is the correct dietary fluoride supplement for
a 4-year-old child who lives in an area that has a 0.5
ppm concentration of fluoride in the water?
a) No supplement is recommended.
b) 0.25 mg
c)0.5 mg
d) 1.0 mg
e) 2.0 mg
9. Which of the following professional topical
fluorides
D has the potential to dissolve the filler particles of
com-posite resin restorations?
a) Monofluorophosphate
b) Sodium fluoride gel
c)Stannous fluoride
d) Acidulated phosphate fluoride
e) Sodium fluoride foam
10. Which of the following professional fluoride treat-
E ments received approval for use in the United
States in 1994 as a cavity liner and for the
treatment of hy-persensitive teeth and has
become a standard of care in practice as a caries-
preventive agent?
a) 1.23% acidulated phosphate fluoride gel
b) 2.0% sodium fluoride foam
c) 2.0% sodium fluoride gel
d) 1.23% acidulated phosphate foam
e) 5.0% neutral sodium varnish
11. All of the following patients would indicate the
need
E for professional topical fluoride treatment except
one. Which one is the exception?
, DHYG 312 Pre-Clinical Final Review
a) A patient wearing orthodontic appliances
b) A patient who exhibits xerostomie
c) A patient who does not have community water
flu-oridation
d) A patient with postsurgical exposed root
e) None of these are correct
12. All of the following indicate the need of a custom
tray D home fluoride application except one.
Which one is the exception?
a) Xerostomia
b) Radiation therapy
c)Rampant caries
d) Orthodontic appliances
e) Root surface hypersensitivity
13. Which of the following has the greatest amount of D
fluoride?
a) Eggs
b) Meat
c)Vegetables
d) Tea
14. Fluoridated salt is recommended by the as an alter- C
native to fluoridated water.
a) U.S. Department of Health
b) CDC
c)World Health Organization
d) Institute of Health
15. Which of the following is true of the halo/diffusion B
effect?
a)It lowers the amount of fluoride in fluoridated water
A+ 2026/2027
1. 1. The maximum caries-inhibiting effect of fluoride is
E seen when there has been systemic exposure
prior to tooth eruption and which of the following?
a) Home use when caries are suspect
b) Professional application of APF fluoride
c) Professional application of neutral sodium fluoride
d) Continual use of fluoride supplements after
erup-tion
e) Frequent topical fluoride exposure throughout life
2. 2. Which of the following is not a posteruptive benefit B
of fluoride exposure?
a) It inhibits demineralization
b) It causes the development of shallower
occlusal grooves.
c)It enhances demineralization.
d) It interferes with the growth of baçteria.
e) It interferes with the metabolism of bacteria.
3. Which of the following enamel surfaces will absorb
C the most fluoride when exposed in the oral
environ-ment?
a) Sound enamel on the facial surface of #8
b) The palatal root of the maxillary first molar
c) Demineralized enamel on the facial surface of #30
d) Exposed enamel in the furcation area of #19
e) Enamel covered by a dental sealant
4. Which of the following chemicals would most likely be A
used in community water fluoridation?
a) Hydrofluorosilicie acid
b) Acidulated phosphate fluoride
, DHYG 312 Pre-Clinical Final Review
c)Stannous fluoride
d) Sodium monofluorophosphate
5. Which of the following systemic fluoride delivery C
methods would be considered most economical?
a) Dietary fluoride supplements
b) Naturally occurring in foods
c) Community water fluoridation
d) Professional fluoride treatment
e) Daily home rinse
6. You have a pregnant patient in the dental chair.
She
B said that her sister took fluoride supplements
while she was pregnant to help her child have
fewer cavities when his permanent teeth come in.
What should you tell this patient?
a) "That sounds like a great idea; keep it up!"
b) "The permanent teeth do not form until after
birth, so this will not help with the child's
permanent teeth."
c) "Good, but be sure to continue with the
supple-ments after delivery while nursing for
extra help."
d) "The fluoride can harm the fetus and should not
be taken while pregnant."
7. What is the maximum amount of NaF that can be C
dispensed per household at one time?
a) There is no limit to the amount dispensed
per household.
b) No more than 132 mg NaF (60 mg of fluoride)
c) No more than 264 mg NaF (120 mg of fluoride)
d) No more than 396 mg NaF (180 mg of fluoride)
8. B
, DHYG 312 Pre-Clinical Final Review
What is the correct dietary fluoride supplement for
a 4-year-old child who lives in an area that has a 0.5
ppm concentration of fluoride in the water?
a) No supplement is recommended.
b) 0.25 mg
c)0.5 mg
d) 1.0 mg
e) 2.0 mg
9. Which of the following professional topical
fluorides
D has the potential to dissolve the filler particles of
com-posite resin restorations?
a) Monofluorophosphate
b) Sodium fluoride gel
c)Stannous fluoride
d) Acidulated phosphate fluoride
e) Sodium fluoride foam
10. Which of the following professional fluoride treat-
E ments received approval for use in the United
States in 1994 as a cavity liner and for the
treatment of hy-persensitive teeth and has
become a standard of care in practice as a caries-
preventive agent?
a) 1.23% acidulated phosphate fluoride gel
b) 2.0% sodium fluoride foam
c) 2.0% sodium fluoride gel
d) 1.23% acidulated phosphate foam
e) 5.0% neutral sodium varnish
11. All of the following patients would indicate the
need
E for professional topical fluoride treatment except
one. Which one is the exception?
, DHYG 312 Pre-Clinical Final Review
a) A patient wearing orthodontic appliances
b) A patient who exhibits xerostomie
c) A patient who does not have community water
flu-oridation
d) A patient with postsurgical exposed root
e) None of these are correct
12. All of the following indicate the need of a custom
tray D home fluoride application except one.
Which one is the exception?
a) Xerostomia
b) Radiation therapy
c)Rampant caries
d) Orthodontic appliances
e) Root surface hypersensitivity
13. Which of the following has the greatest amount of D
fluoride?
a) Eggs
b) Meat
c)Vegetables
d) Tea
14. Fluoridated salt is recommended by the as an alter- C
native to fluoridated water.
a) U.S. Department of Health
b) CDC
c)World Health Organization
d) Institute of Health
15. Which of the following is true of the halo/diffusion B
effect?
a)It lowers the amount of fluoride in fluoridated water
