Oral Anatomy MCQs

Page No. 24

How many roots does a primary maxillary first molar have ___________?


aOne

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bTwo

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cThree

✓


dFour

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View Answer Three

Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference _____________?


aPrimary roots show less a accessory and lateral canals

✓


bPrimary roots resorb more easily

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cPrimary roots are shorter

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dNone of the above

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When viewed occlusally, a primary mandibular second molar closely resembles which of the following mandibular teeth ?


aPermanent second molar

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bPermanent first molar

✓


cSecond premolar

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dPrimary first molar

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View Answer Permanent first molar

Pulp chambers and roots canals in decidous teeth______________?


aWide and deep

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bShallow and narrow

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cWide and narrow

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dShallow and wide

✓


View Answer Shallow and wide

Primary teeth differ from permanent teeth in following aspects ?


aThickness of enamel and dentin

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bPulp chambers are longer

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cRoots are flaring

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dAll of the above

✓


View Answer All of the above

Transverse ridge is prominent on occlusal surface of which of the following decidous teeth ?


aMandibular first molar

✓


bMaxillary first molar

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cMandibular second molar

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dMaxillary second molar

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The highest ( longest ) and sharpest cusp on the decidous mandibular first molar is____________?


aMesiolingual

✓


bDistolingual

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cMesiobuccal

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dDistobuccal

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View Answer Mesiolingual

Mesiodistal width is more than cervico- incisal length of crown in_____________?


aPermanent central incisors

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bDecidous maxillary central incisors

✓


cPermanent maxillary canines

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dPermanent mandibular lateral incisors

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Among the difference between teeth in the decidous and the permanent dentition is that_____________?


aBuccal surfaces of the permanent molars are flatter

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bCervical ridges are more pronounced in permanent molars

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cRoot trunks of decidous teeth are larger compared with their overall root lengths

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dCrowns of decidous incisors are wider mesiodistally than their cervico incisal lengths

✓



Difference between primary and permanent enamel is_______________?


aIn prism arrangement

✓


bin mineral content

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cNo difference in enamel, difference in dentin

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dNone of the above

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View Answer In prism arrangement

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