Generally, the roots of tiger's upper teeth are thick and rough, and slightly curved. The length is 8- 13cm, the crown (exposed surface) accounts for 2/5 or 3/7 of the total length, and there are two blood grooves on the labial and lingual surfaces of the teeth.
The identification of tiger teeth can be seen from the blood grooves. Most tiger teeth have two blood grooves on their lips and 1-2 blood grooves on their tongues. Some individuals have 1 blood grooves on their lips and tongues, which is relatively rare. Blood groove is the main basis for identification, and the lack of marks is more obvious. The blood groove on the surface of resin lip and tongue is shallow, and some fake tiger teeth have no blood groove.