Toothpastes developed for sensitive teeth are one of the easiest and most common ways to reduce sensitivity. But not every toothpaste works in the same way, and if it is not used correctly it may not help.
Ingredients that reduce sensitivity
Potassium nitrate
Helps reduce stimulation of the nerve endings inside the tooth. The effect usually appears after a few weeks of regular use.
Stannous fluoride
Helps seal open dentine tubules and also strengthens the enamel.
Arginine and calcium carbonate
Help form a layer on the dentine surface that blocks the tubules.
Hydroxyapatite and similar minerals
Contain minerals similar to the tooth surface and can contribute to repairing it.
Fluoride
The core ingredient for preventing decay and making enamel more resistant; most sensitivity toothpastes also contain fluoride.
What to look for when choosing
- Choose products clearly labelled for sensitivity.
- Whitening and highly abrasive toothpastes can increase sensitivity; avoid them while your teeth are sensitive.
- Check the fluoride content.
- Stop using any product that causes sores or irritation in your mouth.
Correct use
- Brush twice a day with a soft brush, without pressing hard.
- After brushing, spit out the excess foam instead of rinsing with plenty of water; leaving the ingredients on the tooth surface can increase the effect.
- With some products, dabbing a little toothpaste onto the sensitive area with a fingertip and leaving it for a few minutes is also recommended; follow the product's instructions.
- Use it regularly for at least 2–4 weeks.
When toothpaste is not enough
If sensitivity continues despite regular use, there may be an underlying cause: decay, a cracked tooth, gum recession, a failing filling or teeth clenching. In that case a dental examination is needed. Fluoride varnishes and desensitising agents applied at the clinic can provide extra relief.
For the causes of sensitivity, see our articles why do teeth become sensitive? and, for mouthwash, mouthwash for tooth sensitivity.
