Corrected entry: All of the cavemen have clean shiny white teeth. It is hard to imagine that our cave-dwelling ancestors of 80,000 years ago had such impeccable dental hygiene, when they couldn't even build a fire yet.
Quest For Fire (1981)
1 corrected entry
Directed by: Jean-Jacques Annaud
Starring: Ron Perlman, Rae Dawn Chong, Everett McGill, Nicholas Kadi
Correction: Quite possible since they didn't use sugar. As a matter of fact skeletons of the "before sugar" era have healthy teeth.