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Anatomy of Teeth: Crown Shape and Fossa

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Questions and Answers

What is the shape of the root of the central incisor?

Cone shape with a blunt apex (correct)

Conical with a sharp apex

Oval with a rounded apex

Rectangular with a flat apex

What is the shape of the labial surface of the central incisor?

Smoothly concave

Smoothly convex (correct)

Rectangular

Triangular

Which of the following is NOT a surface anatomy feature of the labial surface of the central incisor?

Cervical ridge

Incisal ridge

Furcation (correct)

Mesial marginal ridge

What is the relationship between the central incisor and the lateral incisor?

The central incisor contacts the mesial surface of the lateral incisor Signup and view all the answers

What is the shape of the crown of the central incisor?

Trapezoid Signup and view all the answers

Which of the following is a feature of the lingual surface of the central incisor?

The surface is narrower than the labial surface Signup and view all the answers

What is the function of the cingulum on the lingual surface of the central incisor?

To provide additional support for the tooth Signup and view all the answers

What is the number of roots of the central incisor?

One Signup and view all the answers

What is the mesio-incisal angle of the central incisor?

Sharp Signup and view all the answers

What is the shape of the incisal outline of the central incisor?

Straight Signup and view all the answers

Study Notes

Central Incisor Shape

The root of the central incisor is conical with a slightly flattened mesial surface.
The labial surface of the central incisor is convex, smooth, and slightly wider at the incisal edge than at the cervical line.
The marginal ridge, the cingulum, and the incisal edge are not surface anatomy features of the labial surface of the central incisor.
The central incisor is located mesial to the lateral incisor.

Central Incisor Crown Shape

The crown of the central incisor is wedge-shaped.

Central Incisor Lingual Surface Features

The cingulum is a visible, prominent bulge on the lingual surface, near the cervical line.

Central Incisor Function

The cingulum contributes to the strength of the tooth and acts as a surface for tongue contact.

Central Incisor Root Features

The central incisor has one root.
The mesio-incisal angle of the central incisor is sharper than the disto-incisal angle.

Central Incisor Incisal Edge Shape

The incisal edge of the central incisor has a slightly curved, triangular outline, with a smooth, cutting surface.

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Description

Test your knowledge of dental anatomy by identifying the different features of the tooth crown, including the lingual fossa, geometrical outline, and labial and lingual outlines. This quiz is perfect for dental students or professionals looking to brush up on their knowledge of tooth anatomy.