Tooth Anatomy
The foundation of your teeth are your gums and jawbone. To keep your teeth in good condition your foundation has to be solid.

 
 
A - 
The crown is the visible part of each tooth
 
B - 
Gumline
C - 
The root of each tooth is lodged in your supporting jawbone.
D - 
The jawbone holds all of your teeth in place.
E - 
Ligaments are fibers that hold each tooth firmly in the jawbone, and act as “shock absorbers.”
F - 
Nerves convey feeling between your mouth and your central nervous system.