What dinosaur has 500 teeth? The dinosaur that had the most teeth is Spinosaurus, a theropod dinosaur that lived during the Cretaceous period. It had around 1,500 teeth, with some estimates suggesting as many as 2,000 teeth. Spinosaurus was known for its large size and long, narrow skull, which was packed with these numerous teeth. These teeth were very thin and quite long, up to 11 centimeters (4.3 inches) and were razor-sharp, making it an efficient predator.
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