its because of lack of calcium most of the time. you should probably talk to your dentist more about it if its causing you any pain or oral problems.
to bite stuff
the sharp is called the teeth and the cutting edge is the blade
stupid people do it
Yes. The herbivores and carnivores and omnivores had flat teeth. They used these for grinding plants and meat for future digestion.
Yes. Though they are not pointed (they are flat instead), they still have a sharp edge that will hurt if the animal decides to clamp down on you if they so choose.
How the teeth are aligned in relation to the jaw is one cause of teeth being on edge. Another cause can be stress. Dental braces is one way to stop it. Another way would be to relax the jaw.
Operation Sharp Edge happened in 1990.
"Projecting" in this case means "sticking out." So a sharp projecting edge is a sharp edge that sticks out.
The manticore can use it's deadly wings to fly to you. It's tail has a extremly sharp edge. It has razor sharp teeth tha if I was standing by a Manticore I would not like it.
They aren't canker sores in the viral sense of the word. The tooth is cutting the edge of the mouth. It attempts to heal itself by creating the white scab that you see and associate with a canker sore.
Any mineral that can be broken (cleaved) at a sharp angle can have a sharp edge. Substances like Flint are good examples
be on edge (teeth), set on edge (teeth)
On a blade, the cutting edge is the sharp side.