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
Related Mcqs:
- While charting the dentition of a child, the pedodontist finds that the following teeth are present in all the four quadrants; permanent central incisor , permanent lateral incisor , decidous cuspid , decidous first molar, decidous 2nd molar and permanent 1st molar. The eruptive pattern may be considered most nearly normal for a child aged_____________?
A. 3-6 years
B. 7-10 years
C. 11-14 years
D. 15- 18 years - 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 - A child has 12 permanent and 12 decidous teeth, what is his age____________?
A. 8½ years
B. 11½ years
C. 4½ years
D. 13½ years - Which statement is correct about decidous 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 10th month in uterus - The primary teeth that present the most outstanding morpholgic deviations from permanent teeth are______________?
A. Central incisors
B. Mandibular first molar
C. Mandibular second molar
D. Canines - 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 - The direction of enamel rods in decidous 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 - 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 - A 20yr old patient reports with multiple swelling of the jaws. Clinical examination reveals multiple hard swellings involving the jaws and intra orally several missing teeth are noticed. Panoramic radiograph reveals multiple radio opaque lesions in the maxilla and the mandible with multiple impacted teeth and supernumerary teeth indicative of Gardeners syndrome: The above mentioned condition is______________?
A. Autosomal dominant disease
B. Autosomal recessive disorder
C. X-linked disease
D. A syndrome of unknown cause - With respect to their permanent successors the sum of the mesidodistal diameters of the first and second decidous molar is generally ____________?
A. Less
B. Greater
C. The same
D. Not related
