The labial view of this tooth considers the portion of the tooth visible from the side where the lips would be.
The mesial outline of the tooth is straight or slightly convex, whereas the distal outline is much more convex.
Consequently, the height of curvature (the point furthest away from the central axis of the tooth) is closer to the mesioincisal angle on the mesial side while more apical on the distal side.

The distal outline of the crown is more convex than the mesial outline, and the distoincisal angle is not as sharp as the mesoincisal angle.

After the mammelons are worn away, the incisal edge of the maxillary central incisor is straight mesiodistally.
The center of the incisal edge curves slightly downward in the center of the tooth.
The cervical line, which is seen as the border between the crown and the root of the tooth, is closer to the apex of the root in the center of the tooth.
This makes the cervical line appear as a semicircle in shape.

From this view, the root is blunt and cone-shaped.
Although there is a large amount of variation between people, the length of the root is usually 2–3 mm longer than the length of the crown.
Large curvatures of the root are usually not seen in this tooth.
The labial view of this tooth considers the portion of the tooth visible from the side where the lips would be. The mesial outline of the tooth is straight or slightly convex, whereas the distal outline is much more convex. Consequently, the height of curvature (the point furthest away from the central axis of the tooth) is closer to the mesioincisal angle on the mesial side while more apical on the distal side.
The distal outline of the crown is more convex than the mesial outline, and the distoincisal angle is not as sharp as the mesoincisal angle.
After the mammelons are worn away, the incisal edge of the maxillary central incisor is straight mesiodistally. The center of the incisal edge curves slightly downward in the center of the tooth. The cervical line, which is seen as the border between the crown and the root of the tooth, is closer to the apex of the root in the center of the tooth. This makes the cervical line appear as a semicircle in shape.
From this view, the root is blunt and cone-shaped. Although there is a large amount of variation between people, the length of the root is usually 2–3 mm longer than the length of the crown. Large curvatures of the root are usually not seen in this tooth.
Maxillary central incisor