The second upper incisors have two roots, another unique feature among mammals.

The upper incisors are orthodont, with their cutting edge nearly vertical.

The length of the first upper incisor is generally less than 7.5mm.

They have 16 teeth and their upper incisors are grooved.

Incision- the point on the occlusal where the upper central incisors meet.

In humans, the term is most commonly applied to an open space between the upper incisors (front teeth).

A diamond was inlaid into one of his upper incisors.

But she smiled, and one of her upper incisors caught on her lower lip.

The upper incisors have enamel only on the dorsal side.

The upper incisors closing scissor-like over those of the lower jaw.