Tiger tooth, also called canine tooth, is a common deformed tooth, which refers to the labial dislocated fangs (two single fangs of the upper jaw) protruding out of the dental arch. Because the crown is big and the root is long, the two teeth next to the front teeth are commonly known as very sharp, which are used to tear meat.

Teeth are the hardest organs of the human body, which not only perform the functions of cutting and chewing, but also play the role of maintaining facial appearance and assisting pronunciation. Teeth can be divided into incisors, canine teeth, premolars and molars. Each tooth consists of a crown exposed outside the alveolar bone, a root growing in the alveolar bone and a neck between the crown and the root.