Decidous Dentition MCQs

Option A: 4 yrs

Option B: 6 yrs

Option C: 8 yrs

Option D: 10 yrs

Correct Answer: 4 yrs ✔

Option A: Tight contacts, absence of spacing

Option B: Shallow overjet and overbite

Option C: Flush terminal plane

Option D: Ovoid arch form

Correct Answer: Tight contacts, absence of spacing ✔

Option A: Mesiobuccal

Option B: Distobuccal

Option C: Mesiolingual

Option D: Distolingual

Correct Answer: Mesiolingual ✔

Option A: In prism arrangement

Option B: in mineral content

Option C: No difference in enamel, difference in dentin

Option D: None of the above

Correct Answer: In prism arrangement ✔

Option A: Buccal surfaces of the permanent molars are flatter

Option B: Cervical ridges are more pronounced in permanent molars

Option C: Root trunks of decidous teeth are larger compared with their overall root lengths

Option D: Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths

Correct Answer: Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths ✔

Option A: Permanent central incisors

Option B: Decidous maxillary central incisors

Option C: Permanent maxillary canines

Option D: Permanent mandibular lateral incisors

Correct Answer: Decidous maxillary central incisors ✔

Option A: Mesiolingual

Option B: Distolingual

Option C: Mesiobuccal

Option D: Distobuccal

Correct Answer: Mesiolingual ✔

Option A: Mandibular first molar

Option B: Maxillary first molar

Option C: Mandibular second molar

Option D: Maxillary second molar

Correct Answer: Mandibular first molar ✔

Option A: Thickness of enamel and dentin

Option B: Pulp chambers are longer

Option C: Roots are flaring

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Wide and deep

Option B: Shallow and narrow

Option C: Wide and narrow

Option D: Shallow and wide

Correct Answer: Shallow and wide ✔

Option A: Permanent second molar

Option B: Permanent first molar

Option C: Second premolar

Option D: Primary first molar

Correct Answer: Permanent first molar ✔

Option A: Primary roots show less a accessory and lateral canals

Option B: Primary roots resorb more easily

Option C: Primary roots are shorter

Option D: None of the above

Correct Answer: Primary roots show less a accessory and lateral canals ✔

Option A: One

Option B: Two

Option C: Three

Option D: Four

Correct Answer: Three ✔

Option A: 2

Option B: 3

Option C: 4

Option D: 5

Correct Answer: 4 ✔

Option A: Mandibular 1st molar

Option B: Mandibular2nd molar

Option C: Maxillary 2nd molar

Option D: None of the above

Correct Answer: Mandibular2nd molar ✔

Option A: Grooves

Option B: Fissures

Option C: Cusps

Option D: All of the above

Correct Answer: Grooves ✔

Option A: Slender mesiodistally

Option B: Slender anteroposteriorly

Option C: Bulkier mesiodistally

Option D: Buliker anteroposteriorly

Correct Answer: Slender mesiodistally ✔

Option A: Four pulp horn and three root canal

Option B: Three pulp horn and three root canal

Option C: Two pulp horn and two root canal

Option D: Two pulp horn and three root canal

Correct Answer: Four pulp horn and three root canal ✔

Option A: 25 μm

Option B: 50μm

Option C: 75μm

Option D: 100μm

Correct Answer: 25 μm ✔

Option A: Same as permanent teeth

Option B: Inclined in an apical direction in the cervical third of crown

Option C: Inclined in an occlusal direction in the cervical third of crown

Option D: None of the above

Correct Answer: Inclined in an occlusal direction in the cervical third of crown ✔

Option A: Less

Option B: Greater

Option C: The same

Option D: Not related

Correct Answer: Greater ✔

Option A: Decidous mandibular 1st molar

Option B: Decidous maxillary 1st molar

Option C: Decidous maxillary 2nd molar

Option D: Decidous mandibular 2nd molar

Correct Answer: Decidous maxillary 2nd molar ✔

Option A: 3

Option B: 6

Option C: 4

Option D: 5

Correct Answer: 5 ✔

Option A: Calcification of maxillary primary first premolar is completed at birth

Option B: Mandibular first molar erupts at one and half years of age

Option C: The crowns of primary dentition are more yellowish than permanent

Option D: The primary dentition is initiated at 10th month in uterus

Correct Answer: Mandibular first molar erupts at one and half years of age ✔

Option A: Enamel rods at cervical region directed occlusally

Option B: Results in constriction at cervical region

Option C: Is characteristic of decidous teeth

Option D: All of the above

Correct Answer: Is characteristic of decidous teeth ✔

Option A: Mandibular central incisor

Option B: Mandibular first molar

Option C: Maxillary central incisor

Option D: Maxillary second molar

Correct Answer: Mandibular central incisor ✔

Option A: 4th month of life

Option B: 4th month in utero

Option C: 41/2 month in utero

Option D: 5th month in utero

Correct Answer: 41/2 month in utero ✔

Option A: Central incisors

Option B: Mandibular first molar

Option C: Mandibular second molar

Option D: Canines

Correct Answer: Mandibular first molar ✔

Option A: Decidous maxillary 2nd molar

Option B: Decidous maxillary 1st molar

Option C: Decidous mandibular 2nd molar

Option D: Decidous mandibular 1st molar

Correct Answer: Decidous maxillary 2nd molar ✔

Option A: From birth to 11 years

Option B: From 6 months to 11 years

Option C: From 6 months to 6 years

Option D: From 6 years to 11 years

Correct Answer: From 6 months to 6 years ✔

Option A: Maxillary first

Option B: Maxillary second

Option C: Mandibular first

Option D: Mandibular second

Correct Answer: Maxillary first ✔