Morphology of teeth

Upper central incisor
This is pillar II. classes according to Voldřich.

The vestibular surface has a quadrangular shape, is convex and is divided by two grooves oriented longitudinally with the long axis of the tooth. These grooves gradually disappear with physiological abrasion.

The palatal surface is, unlike the labial, concave. At the neck, it passes into a pronounced tuberculum dentale. On the sides of the palatal surface are the so-called enamel ridges.

The incisal edgeis perpendicular to the mesial surface, while the distal surface is rounded in the transition to the incision. Contact points between the central incisors in the upper jaw are located in the incisal third of the mesial surfaces. The characteristic shape of the large upper incisor is given by the ratio of both approximal surfaces to the incisal edge.

The root is massive, conical, slightly curved distally and approximately circular in cross-section. The medullary cavity is first very spacious and extends into three corners. The root canal often has a circular cross-section.

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