Pulp chambers and roots canals in decidous teeth______________?
A. Wide and deep
B. Shallow and narrow
C. Wide and narrow
D. Shallow and wide
Oral Anatomy
When viewed occlusally, a primary mandibular second molar closely resembles which of the following mandibular teeth ?
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
Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference _____________?
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
How many roots does a primary maxillary first molar have ___________?
How many roots does a primary maxillary first molar have ___________?
A. One
B. Two
C. Three
D. Four
How many cusps does the crown of the maxillary first primary molar have ?
How many cusps does the crown of the maxillary first primary molar have ?
A. 2
B. 3
C. 4
D. 5
The largest mesiodistal diameter in primary dentition is____________?
The largest mesiodistal diameter in primary dentition is____________?
A. Mandibular 1st molar
B. Mandibular2nd molar
C. Maxillary 2nd molar
D. None of the above
During the development of a tooth, sound coalescence of the lobes results in_____________?
During the development of a tooth, sound coalescence of the lobes results in_____________?
A. Grooves
B. Fissures
C. Cusps
D. All of the above
The crowns and roots of primary molar at their cervical portions are more____________?
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
The pulp of first primary molar contains________________?
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
What is the thickness of the layer of primsless enamel found in primary teeth_____________?
What is the thickness of the layer of primsless enamel found in primary teeth_____________?
A. 25 μm
B. 50μm
C. 75μm
D. 100μm