Tooth decay or cavity is a destructive process of tooth hard tissues, caused by plaque bacteria.

• Decay on the biting surfaces of the teeth occurs when plaque becomes trapped in the grooves. This is most common in children because they often miss these areas when brushing, that’s why sealants are often recommended . • Decay between the teeth. These areas cannot be reached by a toothbrush alone and decay may develop if you do not floss, or clean between your teeth, regularly. • Decay at the root surfaces of the teeth occurs if you have suffered gum recession or bone loss, often associated with gum disease or periodontitis. It is also more common as you get older because gums have started to recede. If plaque is left to build up on the exposed roots of the teeth, which are not protected with enamel, then cavities will quickly develop.