24 Questions
In primary teeth, the thickness of enamel and dentine is:
Half the thickness in permanent teeth
The occlusal cavity in primary teeth must be shallower due to:
Wider proximal box
The crown of primary molars is bulbous due to:
Markedly constricted necks
The isthmus portion of a class II amalgam filling in primary molars should be:
One third to one half the intercuspal width
The enamel cap in primary molars ends abruptly at the CEJ, while in permanent teeth it ends:
With a feather-edge at the CEJ
The roots of primary teeth:
Diverge as they reach the apex to envelop the primary successor
The root canals of primary molars show:
More lateral branching and apical ramifications
The pulp chambers in primary molars are proportionally:
Larger than in permanent teeth
The enamel rods at the cervix slope:
Occlusally in primary teeth
The pulp horns are higher in primary molars, especially the:
Mesial horn
The apical foramina in primary teeth are relatively wider than in permanent teeth, which makes:
The root canals harder to obturate
The enamel cap in primary teeth is thinner and has a constant depth, while in permanent teeth it is:
Thinner and ends with a feather-edge at the CEJ
What is the primary reason for the bulbous crown shape of primary molars?
Greater mesiodistal width compared to permanent molars
What distinguishes the occlusal cavity in primary teeth from that in permanent teeth?
Shallower occlusal cavity due to thinner enamel
What is a distinguishing feature of the apical foramina in primary teeth compared to permanent teeth?
Wider apical foramina
How does the thickness of enamel and dentine in primary teeth compare to that in permanent teeth?
Thinner enamel and dentine
What is a distinguishing characteristic of the pulp chambers in primary molars?
Proportionally larger than in permanent molars
What is the primary reason for the shallower occlusal cavity in primary teeth?
Thinner enamel layer
What is a distinguishing characteristic of the roots of primary teeth?
Shorter roots than permanent teeth
What contributes to the higher pulp horns in primary molars?
Wider pulp chamber
What is a distinguishing feature of the enamel rods at the cervix in primary teeth?
Sloping enamel rods
What distinguishes the isthmus portion of a class II amalgam filling in primary molars?
Narrower isthmus due to thinner enamel
What is a distinguishing characteristic of the enamel cap in primary teeth?
Thinner and with constant depth
What distinguishes the root canals of primary molars?
More in number compared to permanent molars
Test your knowledge of the morphological differences between primary and permanent teeth with this quiz. Identify distinctions in color, size, crown, root, and pulp, and understand the implications for dental management. This quiz covers crown shape, width, and other key differences between primary and permanent teeth.
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