Deciduous Dentition MCQs

Deciduous Dentition MCQs

1. Resorption of root of primary incisors starts at:
   A. 4 yrs
   B. 6 yrs
   C. 8 yrs
   D. 10 yrs
   
2. Which among the following is NOT a common finding of the deciduous dentition:
   A. Tight contacts, absence of spacing
   B. Shallow overjet and overbite
   C. Flush terminal plane
   D. Ovoid arch form
   
3. The sharpest cusp of primary first molar tooth Is:
   A. Mesiobuccal
   B. Distobuccal
   C. Mesiolingual
   D. Distolingual
   
4. Difference between primary and permanent enamel is:
   A. In prism arrangement
   B. in mineral content
   C. No difference in enamel, difference in dentin
   D. None of the above
   
5. Among the difference between teeth in the deciduous and the permanent dentition is that:
   A. Buccal surfaces of the permanent molars are flatter
   B. Cervical ridges are more pronounced in permanent molars
   C. Root trunks of decidous teeth are larger compared with their overall root lengths
   D. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths
   
6. Mesiodistal width is more than cervico-incisal length of crown in:
   A. Permanent central incisors
   B. Decidous maxillary central incisors
   C. Permanent maxillary canines
   D. Permanent mandibular lateral incisors
   
7. Primary teeth differ from permanent teeth in following aspects:
   A. Thickness of enamel and dentin
   B. Pulp chambers are longer
   C. Roots are flaring
   D. All of the above
   
8. The highest ( longest ) and sharpest cusp on the deciduous mandibular first molar is:
   A. Mesiolingual
   B. Distolingual
   C. Mesiobuccal
   D. Distobuccal
   
9. Transverse ridge is prominent on occlusal surface of which of the following deciduous teeth:
   A. Mandibular first molar
   B. Maxillary first molar
   C. Mandibular second molar
   D. Maxillary second molar
   
10. Pulp chambers and roots canals in deciduous teeth:
    A. Wide and deep
    B. Shallow and narrow
    C. Wide and narrow
    D. Shallow and wide
    
11. When viewed occlusally, a primary mandibular second molar closely resembles which of the following mandibular teeth:
    A. Permanent second molar
    B. Permanent first molar
    C. Second premolar
    D. Primary first molar
    
12. Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference:
    A. Primary roots show less a accessory and lateral canals
    B. Primary roots resorb more easily
    C. Primary roots are shorter
    D. None of the above
    
13. How many roots does a primary maxillary first molar have:
    A. One
    B. Two
    C. Three
    D. Four
    
14. How many cusps does the crown of the maxillary first primary molar have:
    A. 2
    B. 3
    C. 4
    D. 5
    
15. The largest mesiodistal diameter in primary dentition is:
    A. Mandibular 1st molar
    B. Mandibular 2nd molar
    C. Maxillary 2nd molar
    D. None of the above
    
16. During the development of a tooth, sound coalescence of the lobes results in:
    A. Grooves
    B. Fissures
    C. Cusps
    D. All of the above
    
17. The crowns and roots of primary molar at their cervical portions are more:
    A. Slender mesiodistally
    B. Slender anteroposteriorly
    C. Bulkier mesiodistally
    D. Buliker anteroposteriorly
    
18. The pulp of first primary molar contains:
    A. Four pulp horn and three root canal
    B. Three pulp horn and three root canal
    C. Two pulp horn and two root canal
    D. Two pulp horn and three root canal
    
19. What is the thickness of the layer of primsless enamel found in primary teeth:
    A. 25 μm
    B. 50μm
    C. 75μm
    D. 100μm
    
20. The direction of enamel rods in deciduous teeth is:
    A. Same as permanent teeth
    B. Inclined in an apical direction in the cervical third of crown
    C. Inclined in an occlusal direction in the cervical third of crown
    D. None of the above
    
21. With respect to their permanent successors the sum of the mesidodistal diameters of the first and second deciduous molar is generally:
    A. Less
    B. Greater
    C. The same
    D. Not related
    
22. Cusp of carbaelli can be considered a normal finding on:
    A. Decidous mandibular 1st molar
    B. Decidous maxillary 1st molar
    C. Decidous maxillary 2nd molar
    D. Decidous mandibular 2nd molar
    
23. How many pulpal horns are there in the mandibular second primary molar:
    A. 3
    B. 6
    C. 4
    D. 5
    
24. Which statement is correct about deciduous dentition?
    A. Calcification of maxillary primary first premolar is completed at birth
    B. Mandibular first molar erupts at one and half years of age
    C. The crowns of primary dentition are more yellowish than permanent
    D. The primary dentition is initiated at 10^th month in uterus
    
25. Cervical bulge. True is:
    A. Enamel rods at cervical region directed occlusally
    B. Results in constriction at cervical region
    C. Is characteristic of decidous teeth
    D. All of the above
    
26. In the majority of situations, that first deciduous tooth to erupt is the:
    A. Mandibular central incisor
    B. Mandibular first molar
    C. Maxillary central incisor
    D. Maxillary second molar
    
27. The primary teeth that present the most outstanding morphologic deviations from permanent teeth are:
    A. Central incisors
    B. Mandibular first molar
    C. Mandibular second molar
    D. Canines
    
28. Which of the following has the maximum faciolingual diameter of the crown:
    A. Decidous maxillary 2nd molar
    B. Decidous maxillary 1st molar
    C. Decidous mandibular 2nd molar
    D. Decidous mandibular 1st molar
    
29. Primary dentition period is:
    A. From birth to 11 years
    B. From 6 months to 11 years
    C. From 6 months to 6 years
    D. From 6 years to 11 years
    
30. Which of the following deciduous molars bears the greatest resemblance to a premolar:
    A. Maxillary first
    B. Maxillary second
    C. Mandibular first
    D. Mandibular second