Dental fluoride: why is it really effective against cavities?

Are you wondering if the fluoride in your toothpaste is really useful or if it's just a marketing ploy? You may have heard contradictory debates on this subject?

The reality is clear-cut: fluoride is the most effective anti-cavity agent recognized by the global scientific community. But you still need to understand how it works and use it correctly.

The team at Rodde & Associés dental practice in Schifflange explains everything you need to know about this discreet but formidable ally for your dental hygiene.

How does fluoride protect your teeth?

A triple protective action

Fluoride acts through three complementary mechanisms that make it a particularly effective shield:

1. Formation of a protective barrier

Once applied to your teeth, fluoride forms a protective layer that repels acid attacks from bacteria present in your mouth.

2. Remineralization of enamel

Throughout the day, your tooth enamel undergoes micro acid attacks (coffee, sodas, fruits, bacteria). Fluoride helps repair this micro-damage by remineralizing weakened enamel.

3. Strengthening dental resistance

By integrating into the enamel structure, fluoride transforms it into fluorapatite, a substance even more resistant to cavities than natural enamel.

What the scientific research says

The World Health Organization (WHO) officially recommends the use of fluoride toothpastes. This recommendation is based on over 70 years of research demonstrating its effectiveness.

Key figures:

• 90% of toothpastes contain fluoride

• 20 to 40% reduction in cavity risk according to studies

• Proven effectiveness in both children and adults

The right dosages according to age

Fluoride concentration must be adapted according to age to optimize benefits while avoiding overdose risks:

Children 0 to 6 years: 500 ppm

At this age, children often swallow part of the toothpaste. A moderate dosage is sufficient for effective protection without risk of dental fluorosis.

Children 6 to 12 years: 1000 ppm

Children have better control of brushing and spit out the toothpaste. The dosage can be increased for better protection.

From 12 years and adults: minimum 1450 ppm

This is the optimal dosage for maximum protection against cavities. Check this information on your toothpaste tube!

How to use fluoride effectively?

At home: the daily routine

Ideal frequency: 2 brushings per day minimum, preferably after main meals.

Necessary quantity:

• Children: a grain of rice of toothpaste

• Adults: the equivalent of a small pea

Professional tip: After brushing, spit out the excess toothpaste but don't rinse your mouth completely with water. This allows the fluoride to continue acting on your teeth for several hours.

At the dental practice: reinforced protection

For patients at risk of cavities (frequent sugar consumption, dry mouth, significant cavity history), we offer fluoride varnish application.

Advantages of fluoride varnish:

• Protection for several months

• Quick and painless application

• High fluoride concentration for maximum effectiveness

• Ideal as a complement to daily brushing

Fluoride: separating fact from fiction

Misconceptions

"Fluoride is dangerous"

At the recommended dosages in toothpastes, fluoride presents no danger. Like any active substance, it's the dose that makes the poison.

"Fluoride-free toothpastes are just as effective"

No scientific study demonstrates equivalent effectiveness of fluoride-free toothpastes against cavities.

"Fluoride is only useful for children"

False! Adults also benefit from its protection, especially with age when enamel becomes more fragile and thinner.

The real risks to know

Dental fluorosis can occur in case of chronic overdose in children under 6 years old. It manifests as white spots on permanent teeth.

Simple prevention:

• Respect dosages according to age

• Monitor that the child doesn't eat the toothpaste

• Use an appropriate amount (grain of rice)

When to consult your dentist?

Certain situations require personalized advice:

• Child who systematically swallows toothpaste

• Recurrent cavities despite regular brushing

• Significant tooth sensitivity

• Doubts about choosing the right toothpaste

In summary

• Fluoride is recognized by the WHO as an "essential medicine" against cavities

• The UFSBD (French Union for Oral Health) advocates its use for all ages in prevention and treatment

• Its preventive and therapeutic effectiveness is scientifically proven

• Dosages must be adapted according to age (UFSBD 2019 recommendations)

• Correct use maximizes its benefits without health risks

• Fluoride can treat cavity lesions before they even become visible

At Rodde & Associés, we support you in choosing hygiene products adapted to your situation and that of your children. Don't hesitate to ask us all your questions during your next visit!

📍 The practice welcomes you in Schifflange, near Dudelange, Kayl, Mondercange and Esch-sur-Alzette.

📞 A question about your family's dental hygiene?

Call us at (+352) 26 74 57 80