The Apatosaurus, a large herbivore related to the Brontosaurus, had chisel-like teeth, but likely swallowed plants whole, without chewing.

Did the Apatosaurus have sharp teeth?

Apatosaurus had a small head and a small brain. In its mouth were peg-shaped teeth with sharp, chiselled tips for eating vegetation.

What kind of dinosaur has no teeth?

Ornithomimids (like Ansermimus, Gallimimus, Ornithomimus and Struthiomimus) did not have teeth, but they had beaks with which they ate plants and insects and small animals.