What causes sensitive teeth?

Sensitive teeth, or dentine hypersensitivity, can be temporary or permanent. The problems can sometimes be caused by cracks or cavities in the teeth, but predominantly sensitivity comes from exposed root surfaces. An incorrect toothbrushing technique may cause gum recession and as well as gum disease (periodontitis) which can leave the root surfaces exposed and sensitive.

The most common reason for sensitive teeth is exposed root surfaces caused by incorrect brushing technique or a too hard toothbrush. There are also other causes of sensitive teeth, such as gum recession caused by, cavities, grinding and clenching.