just like teeth in mouth.
However, there were many different characters for Tooth
Different people drew teeth differently.
The big seal script of the character is
The top is character 止 - Foot/Stop, the bottom is lower teeth. It is easy to understand the bottom part, but what the top really means? There are two different explanations: 1, the teeth bite a toe of animal foot (as food). 2, the top means "No Motionless".When we bite, the top teeth is motionless, only the bottom teeth move. I prefer the latter one.
The small seal script of the character is
The top is similar to that in big seal script. The bottom teeth changed to be wave alike, which may be more like teeth.
The Clerical script is
The top is similar to the small seal script, but the bottom teeth become 4 人, which are really not like teeth, but easier to write because clerical script changed most curves into straight lines.
The traditional song typeface character Tooth is
Similar to clerical script.
The simplified song typeface is
There is only one tooth left. Who has only one tooth? Old people? It really means teeth, just reduced the strokes, which is the purpose of the simplification of characters, but the price is to decrease or destroy the pictography.
The Pinyin for 齿 is "Chi3"。