Oral Histology MCQs

Page No. 19

The dentin adjacent to the dentinoenamel junction is called the______________?


aMantle dentin

✓


bCircumpulpal dentin

✖


cPredentin

✖


dSecondary dentin

✖


View Answer Mantle dentin

Mirgration of odontoblasts into dentinal tubules occurs during ________________?


aCavity preparation

✓


bDehydration

✖


cWater irrigation

✖


d None of the above

✖


View Answer Cavity preparation

The dentin receptors are unique because_____________?


aThey elicit pain to hot and cold

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bThey elicit pain to touch and pressure

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cThey elicit pain to chemicals

✖


dElicit only pain as a response

✓



The zone of dentin most recently formed and uncalcified is known as____________?


aMantle dentin

✖


bCircumpulpal dentin

✖


cPredentin

✓


dSecondary dentin

✖


View Answer Predentin

Dentinogenesis by odontoblasts first begins at_____________?


aPulpal end

✖


bCusp tip

✓


cTooth bud stage

✖


dCervical area

✖


View Answer Cusp tip

The microhardness of dentin is about____________?


a1/2 that of enamel

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b1/7 that of enamel

✖


c1/4 that of enamel

✓


d1/5 that of enamel

✖


View Answer 1/4 that of enamel

Which of the following statement is correct?


a Enamel cannot form in absence of dentin

✓


bThe formation of enamel and dentin are independent of each other

✖


cEnamel formation can occur in absence of dentin

✖


dNone of the above

✖



Physically and chemically, the dentin is closely related to______________?


a Bone

✓


bAcellular cementum

✖


cEname

✖


dNone of the above

✖


View Answer Bone

Formula of hydroxyapatite crystal is____________?


aCa3 (Po4)2 CaCo3

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b3Ca (Po4)2 Ca(OH)2

✓


c CaPo4 Ca(OH)2

✖


dNone of the above

✖


View Answer 3Ca (Po4)2 Ca(OH)2

Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________?


aIncremental lines of retzius

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bIncremental lines of vonebner

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cContour lines of owen

✓


dNone of the above

✖


View Answer Contour lines of owen

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