cario -exam questions ( midterm)

8/2/2019 Cario -Exam Questions ( Midterm)

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**1) Which one is not true about factors contributing to dental caries?

a. Intake of fermentable carbohydrates (esp. sucrose)

b. The teeth exposed to inorganic acidc. Acidogenic bacteria on the surface of the toothd. Quantity of saliva and teeth

2) Which one is not correct about the theory proposed? (#3)

a. Galen - internal action of acrid & corroding humors

b. Guy de Cahuliac - stagnation of juices in teeth cause toothache (suppose;belief that worms cause dental caries)

c. Ficinus - observed filamentous organisms in the enamel cuticle & carious lesions.Also 1st recognize presence of organic matrix in enamel

d. Schatz - proteolysis and chelatione. Hippocrates - concept of humoral pathology & stagnation of juices in teeth causetoothache

3) Which statement is true? (#2)

a. Root caries is not predominant in older ages (predominantly found in teeth ofolder age group w/gingival recession>exposed root surface)

b. Sudden & uncontrollable destruction of teeth is characterized by active caries(acute/rampant caries)

c. The caries near the margin of an existing restoration is called recurrent caries

d. Chronic caries stained lighter color(usually stained a darker colour)

4) When active degradative process on teeth is interrupted or ceases, it refers to:

a. Stopped Cariesb. Rampant caries

c. Incipient Cariesd. Arrested Caries

5) Among the teeth affected first in infant (using FBI Notation System) is:

a. 52b. 81c. 21d. 72

6) Largest portion of white spot lesion (#2)

a. translucentb. darkc. bodyd. surface

7) Which type of lesion of caries take shape of a cone with its base toward EDJ? (#1)


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a. buccal surface cariesb. proximal surface cariesc. occlusal surface cariesd. dentin caries

8) Occlusal crown caries includes the following except: (#2)

a. Lingual surface of maxillary anterior teethb. Buccal pit of molar c. Interproximal surface occur between 1st and 2nd molar

d. Central pit of maxillary 1st molar

9) (#4)I. Mutans streptococci will easily spread from one tooth surface to another in thesame mouth

II. Bacteria does not colonize teeth with same amount

III. Inter-proximal processes are more susceptible to caries than lingual surface

a. True, true, falseb. False, true, truec. True, false, trued. All true

10) These are the most prominent species of M. streptococci found in oral cavity except (#4)

a. streptococci mitoirb. streptococci salivarius

c. streptococci milveri (suppose; S. milleri)d. streptococci sanguise. streptococci mutans

11) Genetic groups IV organisms (of Mutans streptococci) are prominent in: (#4)

a. hamster

b. rat (group II)c. human

d. wild rat (group V)

12) Which of these statement(s) is or are true regarding Veillonella? (#4)

a. It is a gram positive cocci (suppose; gram negative)

b. It has anti carious activityc. It converts lactic acid to weak acid

d. b and c only

13) What component that will increase the tooth resistance to dental caries

a. fluorideb. calciumc. protein


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d. sucrose

14) Which is true about high-fructose corn syrup

a. it was used in processed food until sucrose manufacturedb. it consists of 50% sucrose and 50% fructosec. It can cause dental caries but lesser than sucrosed. it is used as hidden sugar in food processed

15) Below are the classification of dental caries EXCEPT:

a. Rate of destruction of the lesionb. Location of the lesionc. Sexd. Age

17) Which of the following is true about characteristic feature of adolescent caries? (#2)

a. There is slow (rapid) penetration of enamel and extensive involvement of dentinb. Lesion had relatively small opening in enamel with extensive underminingc. Lesion had relatively large opening in enamel with extensive undermining

d. Lesion are in teeth and surfaces that relatively not immune to caries

18) The following is not explained by chemo-parasitic theory by Miller except: (#3)

a. Why some population are caries-freeb. Predilection of specific site on tooth to dental cariesc. Phenomenon of arrested cariesd. All are true

19) What is the pH of critical demineralization (which drives dissolution of

hydroxyapatite of enamel) level? (#4)

a. 3.5 3.0b. 4.5 4.0c. 5.5 5.0d. 6.5 6.0

20) All off the following are correct describing function of saliva, except :

a. Influence the rapidity at which caries developb. Provision of environment for antibacterial action


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c. Prerequisite for caries initiationd. Cleansing effect

21) All of these statement are wrong, except : (#2)

a. Secondary caries attacks the tooth at the centre (at the margin) of an existingrestoration, regardless progression/extent

b. Rampant caries is rarely observed in the permanent teeth of adult (most oftenseen in primary teeth of young children & permanent teeth of teenagers)

c. Recurrent caries is the process that attacks tooth at the margin of an existingrestoration regarding to extension & progression

d. Average size of the lesion in chronic caries is larger than in acute caries (chroniclesion is smaller that acute as progression is much slower)

23) The translucent zone : (#1)

a. Seen in all lesion (not seen in all lesion)

b. Less porous than sound enamel (more porous)

c. Pores has been created by the remineralization process (demineralization)d. Lies at the advancing front of lesion

24) How fluoride deficiency can increase the rate of dental caries?

a. Increase the cariogenicity of local substrateb. Tooth cannot attain its maximum resistance

c. Crytallite apatite will dissolve easilyd. Reduced the amount of calcium and phosphate being absorb

25) Which theory had been influenced by germ theory of disease?

a. Septic theory

b. Millers chemoparasitic theoryc. Proteolytic theoryd. Chemical theory

26) Which statement about dental caries causes had been proposed by Hippocrates?

a. Teeth are destroyed by sulfuric, nitric or acetic acidb. Tooth decay originated from the tooth root itselfc. Infiltration of the enamel and dentin


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34) At which level of severity when the tooth is dark in color? (#2)

a. Rampantb. Activec. Chronic

d. Arrested

35) Causes of caries decline (#5)

a. Decrease consumption of disaccharide lactoseb. Brush teeth 3 times a day

c. Take vitamin C everydayd. Use toothpaste that contain high level of calcium

36) Which is wrong? (#5)

a. Mean DMF increase with age

b. Female have a better oral hygiene than malec. Ancient people have lower caries rate

d. Minangkabau ethnic have a high degree of dental caries

cario -exam questions ( midterm)

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