Primary vs

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In primary teeth, the thickness of enamel and dentine is:

Half the thickness in permanent teeth (correct)

Twice the thickness in permanent teeth

Equal to that in permanent teeth

One third the thickness in permanent teeth

The occlusal cavity in primary teeth must be shallower due to:

Wider proximal box (correct)

Narrower occlusal table

Higher pulp horns

Thinner enamel cap

The crown of primary molars is bulbous due to:

Markedly constricted necks (correct)

Narrow occlusal table

Flattened buccal and lingual inclines

Pronounced cervical ridges

The isthmus portion of a class II amalgam filling in primary molars should be:

One third to one half the intercuspal width Signup and view all the answers

The enamel cap in primary molars ends abruptly at the CEJ, while in permanent teeth it ends:

With a feather-edge at the CEJ Signup and view all the answers

The roots of primary teeth:

Diverge as they reach the apex to envelop the primary successor Signup and view all the answers

The root canals of primary molars show:

More lateral branching and apical ramifications Signup and view all the answers

The pulp chambers in primary molars are proportionally:

Larger than in permanent teeth Signup and view all the answers

The enamel rods at the cervix slope:

Occlusally in primary teeth Signup and view all the answers

The pulp horns are higher in primary molars, especially the:

Mesial horn Signup and view all the answers

The apical foramina in primary teeth are relatively wider than in permanent teeth, which makes:

The root canals harder to obturate Signup and view all the answers

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 Signup and view all the answers

What is the primary reason for the bulbous crown shape of primary molars?

Greater mesiodistal width compared to permanent molars Signup and view all the answers

What distinguishes the occlusal cavity in primary teeth from that in permanent teeth?

Shallower occlusal cavity due to thinner enamel Signup and view all the answers

What is a distinguishing feature of the apical foramina in primary teeth compared to permanent teeth?

Wider apical foramina Signup and view all the answers

How does the thickness of enamel and dentine in primary teeth compare to that in permanent teeth?

Thinner enamel and dentine Signup and view all the answers

What is a distinguishing characteristic of the pulp chambers in primary molars?

Proportionally larger than in permanent molars Signup and view all the answers

What is the primary reason for the shallower occlusal cavity in primary teeth?

Thinner enamel layer Signup and view all the answers

What is a distinguishing characteristic of the roots of primary teeth?

Shorter roots than permanent teeth Signup and view all the answers

What contributes to the higher pulp horns in primary molars?

Wider pulp chamber Signup and view all the answers

What is a distinguishing feature of the enamel rods at the cervix in primary teeth?

Sloping enamel rods Signup and view all the answers

What distinguishes the isthmus portion of a class II amalgam filling in primary molars?

Narrower isthmus due to thinner enamel Signup and view all the answers

What is a distinguishing characteristic of the enamel cap in primary teeth?

Thinner and with constant depth Signup and view all the answers

What distinguishes the root canals of primary molars?

More in number compared to permanent molars Signup and view all the answers