Cario MCQ

Question 1

1. What is the optimal pH of the oral cavity
   a. 6.7-7.2
   b. 5.5
   c. 4.4-6.2
   d. 204
   e. 12-13

Answer 1

a. 6.7-7.2

Question 2

2. Which of the following is NOT one of the four risk factors associated with the
   development of dental caries?
   a. Plaque
   b. Saliva
   c. Fluoride
   d. Diet
   e. Exercise

Answer 2

e. Exercise

Question 3

3. Which of the following stages of fluorosis would the entire surface of the teeth be
   paper white and flecked?
   a. Normal Enamel
   b. Very mild fluorosis
   c. Mild fluorosis
   d. Moderate fluorosis
   e. Severe fluorosis

Answer 3

d. Moderate fluorosis

Question 4

4. Which of the following is not a risk factor of dental caries?
   a. Saliva insufficiency
   b. Dietary sucrose
   c. Fluoride insufficiency
   d. Dental plaque
   e. None of the above

Answer 4

e. None of the above

Question 5

5. According to the Plaque Index scoring system, which score is assigned to plaque
   that typically forms 24 hours following careful toothbrushing?
   a. Score 0
   b. Score 1
   c. Score 2
   d. Score 3
   e. Score 4

Answer 5

2

Question 6

6. What are some functions of saliva in the oral cavity?
   a. Buffering
   b. Remineralising

c. Rinsing
d. Assists with carbohydrate metabolism
e. All of the above

Answer 6

E

Question 7

7. What is the first sign of dental caries?
   a. A large hole
   b. A white spot lesion
   c. A brown spot lesion
   d. Pus
   e. Blood

Answer 7

b. A white spot lesion

Question 8

8. Which one of the following options does not involve in the causation of dental
   caries?
   a. Insufficient saliva
   b. Excessive amount of saliva
   c. Dietary sucrose
   d. Insufficient fluoride
   e. Dental plaque

Answer 8

b. Excessive amount of saliva

Question 9

9. Which of these situation does plaque PH fall？
   a. Sugar-free gum is chewed
   b. Eat Cheese
   c. Drink Water
   d. Sleep
   e. All of above

Answer 9

d. Sleep

Question 10

10. Which of the following is NOT a reason why saliva is necessary for oral health?
    a. Saliva has buffering properties in its ability to neutralise the acids formed by bacteria
    b. Saliva has lubricants, immunoglobulins and enzymes
    c. Saliva contains fluoride to harden tooth enamel
    d. Saliva contains calcium and phosphate ions to remineralise enamel and dentine
    e. Saliva's rinsing capacity helps clear food debris from the teeth and aids in swallowing

Answer 10

c. Saliva contains fluoride to harden tooth enamel

Question 11

11. An arrested lesion is a:
    a. remaining ‘scar’ following successful treatment to bring the decay into remission (often
    end up brown or black)*
    b. remaining white ‘scar’ following successful treatment to bring the decay into remission
    c. Decay in tooth. The enamel is lost and dentine goes soft, brown and mushy.
    d. Decay that is progressing but not yet deep into the Dentin.
    e. Decay into the pulp of tooth.

Answer 11

a. remaining ‘scar’ following successful treatment to bring the decay into remission (often
end up brown or black)*

Question 12

12. In Fluorosis, which cells does the Fluoride directly effect?
    a. Odontoblasts
    b. Osteoblasts
    c. Ameloblasts
    d. Progenitors
    e. Osteoclasts

Answer 12

c. Ameloblasts

Question 13

13. Which of the following can cause dental caries?
    a. The number of dental plaque containing cariogenic bacteria is less than usual
    b. Eat free sugar before going to bed and do not brush your teeth
    c. Brushing teeth with fluoride toothpaste
    d. Reduce/substitution sugary foods
    e. Avoid snacking

Answer 13

b. Eat free sugar before going to bed and do not brush your teeth

Question 14

14. What is the name of the dental mineral in the enamel and dentine, which is
    crystalline calcium phosphate?
    a. Hydrogen Peroxide
    b. Hydroxiphthalate
    c. Hydroxyapatite
    d. Dihydrogen Monoxide
    e. Bromothymol hexanamide

Answer 14

b. Hydroxiphthalate

Question 15

15. Which of the following forms can help in term of resistance toacid attack?
    a. Hydroxyapatite forming
    b. Fluorosis
    c. Fluorapatite forming
    d. Refined carbohydrates
    e. Unrefined carbohydrates

Answer 15

c. Fluorapatite forming*

Question 16

16. How many Plaque Index scores are there?
    a. 2
    b. 3
    c. 4
    d. 5
    e. 6

Answer 16

4

Question 17

17. what is hydroxyapatite?
    a. calcium nitrate
    b. calcium carbonate
    c. calcium flouride
    d. calcium phosphate

Answer 17

d. calcium phosphate

Question 18

18. What are the major sites, where carries occur commonly? Please select all the
    correct answers? (Mam I could not choose more than one correct answer, answer
    for this question is a,b,&c options

a. Along the gingival margins
b. Interproximal areas
c. Cavity Design: Class I
d. Molar Cups
e. All the above

Answer 18

c. Cavity Design: Class I

Question 19

19. The critical pH below which demineralisation of tooth enamel usually occur at
    a. 5
    b. 6
    c. 5.5
    d. 6.5
    e. 6-6.5

Answer 19

c. 5.5*

Question 20

19. The critical pH below which demineralisation of tooth enamel usually occur at
    a. 5
    b. 6
    c. 5.5
    d. 6.5
    e. 6-6.5

Answer 20

c. 5.5*

Question 21

20. When is the pH level in your saliva tend to rise?
    a. During Night Time
    b. Consuming Cheese
    c. When Eating Sweet Food
    d. Chewing Sugar Gum
    e. Your pH saliva levels does not change
21. Which one of the following salivary bacterial

Answer 21

b. Consuming Cheese*

Question 22

21. Which one of the following salivary bacterial composition have a high abundance
    in a healthy mouth?
    a. Neisseria, Haemophilus, Fusobacterium
    b. Neisseria, sucrose, Fusobacterium
    c. Haemophilus, caries, lesions
    d. Neisseria, Haemophilus, Hydroxyapatite
    e. Hydroxyapatite, plaque, Neisseria

Answer 22

a. Neisseria, Haemophilus, Fusobacterium

Question 23

22. Which option is not one of the four specific risk factors for dental caries?
    a. Insufficient saliva
    b. Dietary sucrose
    c. Insufficient fluoride
    d. Dental plaque containing less cariogenic bacteria
    e. Dental plaque containing more cariogenic bacteria

Answer 23

Dental plaque containing less cariogenic bacteria

Question 24

23. Which of the following is NOT an area prone to infection

a. Interproximal regions
b. Along incisial edges
c. Gingival margins
d. Pits on occlusal surfaces
e. Grooves within occlusal surfaces

Answer 24

b. Along incisial edges *

Question 25

24. Which is not one of the 4 specific risk factors for dental caries?
    a. Dental plaque containing cariogenic bacteria
    b. Insufficient saliva
    c. Dietary sucrose
    d. Insufficient fluoride
    e. Insufficient moisture

Answer 25

e. Insufficient moisture

Question 26

25. When does plaque pH rise?
    a. At night time when saliva flow decreases
    b. When sugar containing gum is chewed
    c. When flow velocity of saliva is low
    d. Through chewing stimulation
    e. When sweet foods are consumed between meals

Answer 26

d. Through chewing stimulation

Question 27

26. According to the Plaque Index, what score refers to plaque that is not visible but
    can be wiped off the tooth surface with a periodontal probe?
    a. 0
    b. 1
    c. 2
    d. 3
    e. 4

Answer 27

b. 1*

Question 28

27. What are the most vulnerable sites for plaque build up?
    a. Along gingival margin
    b. Between teeth
    c. On the smooth surfaces (labial and lingual)
    d. Within grooves, the pit and fissure systems on occlusal surfaces
    e. None of the above

Answer 28

. Within grooves, the pit and fissure systems on occlusal surfaces

Question 29

28. In which area are dental caries least likely to occur?
    a. Gingival margin
    b. Pits (occlusal)
    c. Fissures (occlusal)
    d. Interproximal region
    e. Labial and lingual surfaces

Answer 29

e. Labial and lingual surfaces

Question 30

29. What is/are the major function(s) of saliva? A:Lubrication B: Increase in volume
    when we're hungry C: Enzyme storage D: Oral rinsing E:Remineralisation of
    enamel and dentine
    a. A & B only
    b. B, C & D only
    c. A, C, D & E only
    d. A, C & E only
    e. All of the above

Answer 30

c. A, C, D & E only *

Question 31

30. Acquired Pellicle is a…?
    a. acellular, homogenous organic film which forms on enamel and other hard surfaces
    by selective absorption of salivary proteins.
    b. the observable effect of disease activity – is the hole-in-the-tooth or cavity
    c. is one that is progressing due to continuing disease activity
    d. s a remaining ‘scar’ following successful treatment to bring the disease into
    remission.
    e. All of the above

Answer 31

a. acellular, homogenous organic film which forms on enamel and other hard surfaces
by selective absorption of salivary proteins.

Question 32

31. Which of the following is not a risk factor of dental caries?
    a. Dental plaque containing cariogenic bacteria
    b. Saliva sufficiency
    c. Fluoride insufficiency
    d. Dietary sucrose
    e. high pH

Answer 32

b. Saliva sufficiency

Question 33

32. Which conclusion highlights one of the Vipeholm study?
    a. Sugar in sticky form during breakfast does not increase caries incidence.
    b. Sugar in solution during lunch can increase caries incidence.
    c. Any form of sugar at mealtime can increase caries incidence.
    d. Sugar in solution at mealtime does not increase caries incidence.
    e. Sugar in sticky form between meals does not increase caries incidence.

Answer 33

d. Sugar in solution at mealtime does not increase caries incidence. *

Question 34

33. Where is dental caries most uncommon
    a. Lateral Incisors
    b. Central Incisors
    c. Canines
    d. Molars
    e. Premolars

Answer 34

c. Canines*

Question 35

34. Which of the following is a site for plaque build-up?
    a. Along gingival margin

b. Between teeth
c. Within grooves
d. Gingival recession sites
e. All of the above

Answer 35

e. All of the above

Question 36

35. What class of carries involves lesions in the pits and fissure systems of an posterior
    teeth?
    a. Class 5
    b. Class 2
    c. Class 1
    d. Class 3
    e. Class 4

Answer 36

c. Class 1*

Question 37

36. Which of the following does not decrease adult plaque pH?
    a. When the flow velocity of saliva is low
    b. When sugar containing gum is chewed
    c. When cheese is consumed
    d. At night time when saliva flow decreases
    e. When other sweet foods are consumed in-between meals

Answer 37

c. When cheese is consumed

Question 38

37. What type of carbohydrate is most cariogenic?
    a. Complex carbohydrates
    b. Simple Sugars
    c. Sugar Alcohols
    d. Artificial Sweeteners
    e. Dietery fibers

Answer 38

b

Question 39

38. Which option DOES NOT describe dental plaque?
    a. Soft
    b. Bacterial deposit
    c. Mineralized
    d. Can be removed mechanically

Answer 39

c

Question 40

39. Which of these is not a role of saliva?
    a. Buffering
    b. Rinsing
    c. Demineralise enamel and dentine
    d. Lubricating
    e. Harden plague

Answer 40

c

Question 41

40. Which product would you recommend to a young patient to help maintain the pH
    levels in their mouth.
    a. Sugary gum
    b. Sugar-free gum
    c. Sugary and sticky gum
    d. Fruits
    e. Fluoride rinse

Answer 41

b. Sugar-free gum

Question 42

41. What is the second stage of caries development?
    a. Tooth starts breaking down - loss of tooth structure and height
    b. White spot lesion
    c. Loss of enamel - sign that caries has reached the dentine
    d. ‘Hole’ develops
    e. Dentine gets soft, brown and mushy

Answer 42

c