The researchers found that the beaver teeth structure has a high content of iron inside it. This makes their teeth very hard and more resistant to acid than other types of teeth enamel found in other species.
According to the scientists, the beaver’s teeth are more resistant and harder than teeth that have been treated with fluoride.
Tooth enamel is usually made of layers of nanowires or hydroxypatite. The scientists involved in the news study discovered that surrounding the nanowires layers are materials like magnesium and iron, which makes the beaver teeth much stronger than regular teeth.
Also, the iron and magnesium are responsible for controlling the acid resistance and mechanical properties of the tooth enamel.
Derk Joester, one of the scientists involved in the new study, explained that is actually the first study that highlights the “this amorphous or unstructured phase in enamel exists”.
Also, Joester added that their study is the first of its kind that demonstrates the structure and composition of tooth enamel.
Joester writes in a statement that his team of researchers has made a big step in understanding the enamel’s composition and structure, which is the protective outer layer of the tooth.
According to the findings of the new study, an important factor responsible for the appearance of tooth decay is the unstructured material, which makes up only a small part of the enamel.
The study also reveals that the minority of ions plays a very important role in the tooth’s protection against cavity.
The researchers believe discovered that magnesium plays the same role in regular enamel, but iron exists in the pigmented enamel of beavers’ and other rodents’ teeth.
The scientists studied the enamel structure of three rodents: the beaver, mouse and rabbit. They used atom-probe tomography and other methods to map the enamel’s structure and discovered that the nanowire was surrounded by the amorphous structure.
According to Joester, human teeth have a different chemical composition than the teeth of beavers, which explains why these rodents can feed on tree trunks and still have strong teeth.
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