There are two different theories about the origin of teeth. One of these theories is that teeth were first in the oral region claims to have originated. According to the second theory, teeth were once part of the scales and armor of living things, but later evolved into what they are today.

who lived in North America between 65 million and 100 million years ago Ischyrhiza mira a kind of sawfish fossilThis could end the discussion. In their research, scientists found findings to support the theory that teeth come from outside.

The first tooth samples may be:

Today saw sharks and sawfish Like this creature, this creature has spines on its snout that are used to chase predators and find food. The dimensions of these structures, also called beak bites, are different from other spines in their bodies.

researchers, beak teeth conducted a study to uncover the relationship between postage and postage stamps. In these studies, they also discovered a hard outer cuspid layer. The structure they found was very different from what they expected.

Scientists have discovered that these tooth-like structures it’s quite complicated While saying that, they also stated that the teeth they saw in the ancient sawfish were very similar to the teeth we see in sharks today. The teeth of modern sharks are composed of microcrystals aligned at the top and scattered to the bottom. This makes them resistant to intense pressure and weight. According to the researchers, these structures perform the same function in ancient sawfish.