1. The highest ( longest ) and sharpest cusp on the decidous mandibular first molar is____________?
2. Transverse ridge is prominent on occlusal surface of which of the following decidous teeth ?
A. Mandibular first molar
B. Maxillary first molar
C. Mandibular second molar
D. Maxillary second molar
3. 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
4. Conjoint tendon is formed by _________?
A. External and internal oblique
B. External oblique and transversus abdominis
C. Internal oblique and transversus abdominis
D. Internal oblique
5. Resorption of root of primary incisors starts at_____________?
A. 4 yrs
B. 6 yrs
C. 8 yrs
D. 10 yrs
6. Which among the following is NOT a common finding of the decidous dentition ?
A. Tight contacts, absence of spacing
B. Shallow overjet and overbite
C. Flush terminal plane
D. Ovoid arch form
7. The sharpest cusp of primary first molar tooth is____________?
8. 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
9. 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 deciduous teeth are larger compared with their overall root lengths
D. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths
10. 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