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


bThey elicit pain to touch and pressure


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


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


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


bIncremental lines of vonebner


cContour lines of owen


dNone of the above


View Answer Contour lines of owen

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