Tooth decay, also known as dental decay or dental caries, is when acids in your mouth dissolve the outer layers of your teeth.
Maintaining good oral hygiene through brushing and flossing your teeth is one of the most effective ways to prevent tooth decay.
Want to help us improve NHS Choices? Find out more and sign up to our user research panel. Yes, I'm interested; Maybe later; No thanks.
Tooth decay occurs when a sticky acidic film called plaque builds up on your teeth and begins break down the surface of your teeth.
The treatment for tooth decay largely depends on how advanced the problem is.