What Causes Sensitive Teeth?
Tooth Sensitivity is Caused by the Exposure of Dentine
Tooth sensitivity is caused by the gradual exposure of the softer part of your tooth that lies under the tooth enamel, called dentine. Dentine has tiny tubes (tubules) that are filled with fluid. Eating or drinking foods and drinks that are hot, cold or sweet can cause this fluid to move. This fluid movement causes the nerve endings in your teeth to react in response, triggering a twinge of discomfort or a short, sharp pain.
Some of the most common dental conditions that can cause sensitive teeth include:
Dental hygiene habits such as brushing too frequently, too vigorously or with a hard-bristled toothbrush can eventually wear down tooth enamel. These can also cause receding gums, causing further exposure of the dentine.
If you grind your teeth when you sleep, or if you clench your teeth throughout the day, you may be wearing down enamel and exposing the underlying dentine layer of your tooth.
A receding gum can expose the dentine and create sensitive areas.
You will find some useful answers about teeth sensitivity on this website but if you are concerned that your sensitivity may indicate a more serious condition, make sure to also schedule an appointment with your dentist or dental hygienist.
The sensitivity which can be experienced during and after professional tooth whitening (bleaching) treatments is different from dentinal hypersensitivity.