Yes, fluoride is safe and effective at the levels used in toothpaste, dental treatments and fluoridated water. Major health organisations, including the World Health Organization, support its use to prevent tooth decay. As with many substances, the dose matters, which is why children’s toothpaste amounts are carefully guided.
How fluoride protects teeth
- Strengthens enamel, making it more resistant to acid attacks
- Repairs early decay by helping minerals return to weakened enamel
- Reduces acid production by plaque bacteria
Recommended toothpaste amounts
| Age | Amount of fluoride toothpaste |
|---|---|
| From the first tooth to age 3 | A smear, about the size of a grain of rice |
| Ages 3 to 6 | A pea-sized amount |
| Over 6 and adults | A pea-sized amount or a thin strip |
Supervise young children’s brushing and teach them to spit rather than swallow.
[Editor’s note: confirm toothpaste strength guidance with your local dental association, as recommended fluoride concentrations by age vary slightly between countries.]
What about fluorosis?
Dental fluorosis is a change in enamel appearance, usually faint white flecks or lines, caused by too much fluoride while teeth are forming in early childhood. It is mostly cosmetic. Using the right amount of toothpaste and supervising young children prevents it.
Professional fluoride treatments
At Melrose Advanced Dentistry, we may recommend fluoride varnish for:
- Children, to protect developing teeth
- Adults with frequent cavities
- People with dry mouth, braces or exposed roots
- Anyone with sensitive teeth
Varnish is painted on in seconds and is very safe because only a small amount is used.
Frequently asked questions
Is fluoride in tap water safe? At the levels used in community water fluoridation, health authorities consider it safe and beneficial.
Should I use fluoride-free toothpaste? We do not recommend it for most people, as fluoride is the main ingredient that prevents decay.
What if my child swallows toothpaste? Swallowing small amounts occasionally is not harmful. Use the recommended amount and store tubes out of reach.
Questions about fluoride for your family? Ask us at your next visit to Melrose Advanced Dentistry in Melrose, Johannesburg: 072 200 1774 or advanced-dentistry.co.za.