Because it helps whiten teeth and keeps them healthy is the common understanding though possibly failing in accuracy as new research continues to emerge.
The idea that fluoride improves dental health was generated in the 1940's. More recently, several studies have produced contradicting evidence. Fluoride is a harmful substance which is linked to cancer and (ironically) tooth enamel degeneration when ingested too often.
There are several non-fluoride toothpaste varieties on the market.
ref:
Sodium fluoride.
This toothpastes contain sodium fluoride (NaF), tin fluoride (SnF2), sodium monofluorophosphate(NaPO3F), etc. as fluoride source.
It can take 256 mg of Fluoride to make one bottle of toothpaste. Fluoride is added to toothpaste to disrupt the process of tooth decay.
The element fluorine, as stannous fluoride or as sodium fluoride, is added to toothpaste (and some drinking water) to aid in the strengthening of tooth enamel.
Fluoride in toothpaste usually comes from two sources: sodium fluoride or stannous fluoride. These are chemical compounds that are added to toothpaste to help prevent tooth decay and strengthen tooth enamel. The fluoride in toothpaste is typically synthetic rather than being derived from natural sources like minerals.
Toothpaste contains 20 - 42% water. Around half of the compounds are abrasives like alum1inum hydroxide, calcium carbonate, calcium hydrogen phosphates, silica's, zeolites, and hydroxyapatite. It also contains fluoride in various forms like sodium fluoride.
It is the element Fluorine. It is added as Fluoride.
Fluoride compounds like sodium fluoride are added to toothpaste to help strengthen tooth enamel, making teeth more resistant to decay and cavities. Fluoride can also help to remineralize teeth and prevent the growth of harmful bacteria in the mouth, contributing to overall oral health.
Floride is added to toothpaste to strengthen the enamel of the tooth. This helps prevent tooth decay, particularly in children.
Inorganic compounds of fluoride, including sodium fluoride (NaF), stannousfluoride (SnF2) and sodium monofluorophosphates are used in toothpaste to prevent dental cavities. Fluorine helps strengthen tooth enamel.
Some chemicals added to prevent tooth decay are: sodium fluoride, potassium fluoride, stannous fluoride, sodium fluoride phosphate, etc.
Fluoride