Tiger teeth, also known as cuspids, are the third cuspids of the upper jaw, located at the corners of the mouth. If the tiger teeth are not within the normal alignment, they can be restored to their normal, aesthetic state by means of orthodontics. If the tiger teeth are displaced outward or inward, they are mainly caused by crowding and need to be straightened by orthodontics. Crowded teeth are usually caused by insufficient bone volume. If the patient is young and has a narrow dental arch, the bone volume can be increased by expanding the arch and widening the upper and lower jaws, plus the child has room to grow and develop, so that there is enough room for teeth to erupt. If the tiger teeth are still moderately or severely crowded after the permanent tooth replacement is completed, the teeth can be straightened by subtracting the number of teeth, such as removing the first bicuspid, to provide space for the tiger teeth. In conclusion, normal tiger teeth are important pillars that support the mouth and face, have the role of tearing food and helping chewing, and are important teeth that are generally not easily extracted.