Many people have a misconception that if they can thoroughly brush their teeth clean, they can avoid having tooth decay. In fact, besides brushing teeth thoroughly, a good dietary habit also plays an important role in tooth decay prevention.

What kind of food will lead to tooth decay?

All food that contains sugar can be metabolised by the bacteria in the plaque located on the tooth surfaces to produce acid. The acid will then lead to loss of minerals from the tooth surfaces, causing tooth decay.
Animation of the longitudinal section of a tooth crown with decay started in enamel and then all the way to dentine leading to apparent cavity
Most of the food and drinks available in the market contain sugar which will increase the risk of getting tooth decay.

Snacking frequency and tooth decay

As soon as we eat or drink, the bacteria in the plaque will metabolise the sugar and produce acid. The acid will then lead to loss of minerals from the tooth surfaces. Chances of getting tooth decay will be reduced by allowing sufficient time in between meals for the saliva to neutralise the acid and redeposit minerals onto the tooth surfaces.
Photograph of a chart showing the change of pH in the mouth.

Consequences of frequent snacking

If having snacks frequently, there will be continuous production of acid and insufficient time for the saliva to neutralize the acid. This will result in persistent acidic environment in the mouth, which favours the development of tooth decay.

Photograph of a chart showing the pH level below 5.5 in the mouth.

Therefore, even a small piece of biscuit or a sip of beverage is considered one snack, which will bring one more chance of getting tooth decay.