> Ideally you do want to get even small ones filled as a preventative measure. To add even more confusion, this is mostly untrue. Fillings don't last forever,

> Ideally you do want to get even small ones filled as a preventative measure. To add even more confusion, this is mostly untrue. Fillings don't last forever, so prematurely filling "starts the clock" because the filling will eventually fail and every time a filling is made, more healthy tooth must be removed. (I say mostly untrue because mercury amalgam fillings really can last multiple decades, but these have fallen out of favor).