In the light of different position, the mesiodens were extracted respectively by the technique of labial ladder-shaped flap, palate-tongue shaped flap or incision of alveolar ridge crest.
The side of each leaf looks a little like the jaw of a lion, and our name dandelion comes from the French name of this plant, which means " lion's tooth. "
Grass-eating animals like the cow can move their jaws sideways as well as up and down, in order to grind their food well; but flesh-eating animals like the dog can only move their jaws up and down.