Although widespread, tooth decay is one of the most preventable health conditions. As long as you look after your teeth well and visit your dentist regularly, you should be able to prevent tooth decay.
There are also some changes you can make to your diet to minimise your risk of tooth decay. For example, cutting down on sugary food and drinks, particularly between meals or within one hour of going to bed.
If you get tooth decay, there are techniques that can help repair damaged teeth, such as fillings and crowns.
In more advanced cases of tooth decay, there may be a need for root canal treatment, or the tooth may need to be removed.