The amount of teeth a character has shows their personality
A character's dental state will often be used to show their personality. A young child will often have missing teeth, typically the front ones, if they are supposed to be energetic or innocent. It may be used with older children, ones who have had their teeth taken out, to showcase someone who is troublesome or reckless. With adults it almost always showcases someone who is either poor, unhygienic, or rough.