Upper lateral permanent insicor

The small incisor is similar in shape to the middle incisor, but unlike it, it is smaller and more graceful. The shape of the tooth shows considerable variability, we find a rudimentary, so-called cone-shaped shape, relatively often the tooth is not established at all. This is pillar III. classes according to Voldřich.

The labial surface is convex, more pronounced in the mesial part. Grooving rarely occurs.

The palatal plate is strongly concave, its edges are lined with enamel strips. In the cervical part, we find a well-developed tuberculum dentale, on the coronal side of the bump there is usually a depression - foramen caecum, which can be the place of invagination of enamel and dentin - the formation of dens in dente.

The Approximal surfaces are arched, have the shape of a triangle. As with the middle upper incisor, the mesial surface is straighter, it passes into the incisal edge at a sharper angle. In contrast, the distal surface is more convex and slopes gradually towards the cutting edge.

The root is one, more slender and weaker than the root of the maxillary central incisor. It has an oval shape in cross-section, flattened mesiodistally. From the median plane, the root often deviates in a palatal or distal direction. The root canal is also one, it follows the shape and curvature of the root, which makes the tooth very difficult to treat endodontically.

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