The Toothbrushing Mistake That Can Increase Your Cavity Risk

If you finish brushing your teeth with a thorough rinse and gargle because it makes your mouth feel cleaner, you may want to rethink the habit.

Many of us were taught to rinse after brushing from childhood. But dental experts increasingly recommend something different: spit out the excess toothpaste, but don’t rinse your mouth with water.

Why? It all comes down to fluoride.

Why rinsing after brushing matters

A paper published in the British Dental Journal examined the available evidence on rinsing after brushing and brought together the views of dental experts, led by Professor Nigel Pitts.

The researchers noted that what we do immediately after brushing can affect how much fluoride remains in the mouth.

Fluoride toothpaste does more than help clean your teeth. Fluoride helps protect tooth enamel against decay, and allowing some of it to remain on the teeth after brushing gives it more time to work.

When you immediately rinse your mouth with water, you wash away and dilute some of that fluoride.

While the researchers acknowledged that the evidence surrounding the ideal post-brushing routine is not perfect, professional guidance has consistently favored a simple approach: spit out the excess toothpaste rather than rinsing it away.

The simple rule: Spit, don’t rinse

Rinsing with water after brushing does not damage your teeth. The concern is simply that it reduces the amount of fluoride left behind.

That is why the advice is so easy to remember: spit, don’t rinse.

After brushing, spit out the excess toothpaste and leave the small amount that remains on your teeth rather than washing it away with water.

This gives the fluoride more opportunity to continue protecting the enamel after you have put down your toothbrush.

What about mouthwash?

Using mouthwash immediately after brushing can create a similar problem, particularly if the rinse contains little or no fluoride, because it can wash away the more concentrated fluoride left behind by your toothpaste.

Instead, mouthwash can be used at a different time of day, such as between brushing sessions, if it is part of your oral care routine.

There are different types of mouthwash, however, and people using a particular product for a dental condition should follow the instructions given by their dentist.

One small change to your routine

You do not need to completely change the way you brush your teeth.

Brush thoroughly with fluoride toothpaste, spit out the excess when you are finished, and skip the final rinse with water.

It may feel strange at first, especially if you have been rinsing after brushing your entire life. But leaving that small amount of fluoride behind allows your toothpaste to keep doing its job even after you have finished brushing.

Sometimes better dental care is not about adding another step to your routine. It is about leaving one out.