There are other things to fix, not just her yellow teeth.

NEWYORKER: M&M World

Chunky yellow teeth they were, and the gums pale pink.

NEWYORKER: Pumpkin Head

The bad force is an undulating, pullulating, filthy, dark mass, at the center of which a hell-mouth with dagger teeth and lips spews scalding yellow mist.

NEWYORKER: Green Lantern