Or the use of teeth in fiction.

Most of the time, you get Hollywood Teeth- everybody has [[EternallyPearlyWhiteTeeth lovely straight pearly whites]], even where this is unlikely (more on the lack of orthodontics front than access to sweets).
** This is occasionally subverted for realism's sake: in the Broadway version of ''Theatre/LesMiserables'', the characters have horrible teeth, which makes sense since most of them are, well, poor.

However, teeth can have other connotations.
* Missing teeth can be seen on roguish or villainous sort of characters, like [[Literature/OliverTwist Fagin]].
** Or, conversely, on cute little kids who are losing their baby teeth.
** Or as a comedic effect.
* [[OurVampiresAreDifferent Vampireth]] have [[FangThpeak fangth]].
* Someone's teeth may shatter in a cartoon situation.
* BritishTeeth - Yellowing, busted piano keys may best describe the teeth of the British if this trope is to be believed.
* YellowPeril: Villainous Asians have crooked teeth.
* CuteLittleFangs may express a character's hyperactivity.
* GoldTooth: Usually reserved for greedy villains.
* [[ToothyBird Birds]] (and other animals that don't have teeth in real life) are drawn with teeth so that their mouth looks more human-like when they talk.

Toothy Tropes And Idioms:
* MoreTeethThanTheOsmondFamily
* TheToothHurts (teeth suffering as a subtrope of AnatomyAgony)
* VaginaDentata (kind of... don't think about it too long.)