He did have to buy most of the teeth. I noticed how hard it was to get some teeth and how easy it was to get others. I literally spent three years going through hundreds upon hundreds of teeth to get the right sizes, quality textures, and the right positions. Real sharks' jaws are made of cartilage, like the rest of their skeletons, and are too soft to survive as fossils. The fossil teeth date from the Miocene and Pliocene epochs and are between 5 and 15 million years old.
Sharks continually shed teeth as they grow.
They have up to six rows of teeth. As the worn front teeth fall out, they are quickly replaced by the next in line. Scientists estimate that a normal shark produces 30,000 teeth during its lifetime. The continual shedding of teeth is why they are so plentiful in the clays of certain South Carolina rivers. Unfortunately, they occur in tidal areas, where the current is swift and the visibility poor.