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Blog Dr. Alex Llanos

What Is Fluoride?

Fluoride is a naturally occurring mineral found in water and some foods (internal sources) that, when ingested, concentrates in bones and teeth.


Dental fluoride protects our teeth throughout our lives, but it has the most beneficial effect during childhood, as "baby teeth" are in the process of formation.

In the case of children, fluoride can be ingested through water because some mineral water manufacturers add a significant amount of this product. Additionally, they can obtain it from toothpaste.

In adulthood, fluoride acts by preventing the appearance of cervical or root caries and even eliminating tooth sensitivity, for example, when a person has periodontal disease.

It is obtained from external sources because most toothpaste and mouthwashes contain fluoride, which is deposited daily on the teeth, as well as through topical applications by your oral health professional.

How does fluoride strengthen the teeth?


When it reaches the teeth, fluoride is absorbed by the enamel. It helps repair the enamel by replenishing lost calcium and phosphorus to keep the teeth hard. This process is called remineralization.

When fluoride is present during remineralization, the minerals deposited in the tooth enamel help strengthen them and prevent dissolution during the subsequent demineralization stage. Therefore, fluoride helps slow down the decay process and prevent cavities.

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