These are molars.
A back tooth is another name for a molar tooth.
The part of a tooth that is exposed and above the gum is called "crown", not to confuse with a crown that is prothesis to restore a heavily damaged tooth. The part of a tooth that is hidden inside the bone is called "root".
A back tooth can cause swelling at the back of the head. This is especially true if your back tooth is infected.
yes the mexican tooth fairy is called tooth mouse
A tooth on a wheel gear is called a cog.
an insect in a tooth.
Tooth enamel.
you probably got pranked from someone cuz the tooth fairys not real
Enamel is called the dentine part of the tooth
The Scottish tooth fairy is called tannfé.
that is called an "I-tooth" and the orthodontist puts braces on that tooth and, if you don't need braces otherwise, the teeth surrounding it.
The entire back surface is called the "lingual" of the tooth.