What Causes Sensitive Teeth?
Tooth Sensitivity is Caused by the Exposure of
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 contain nerve endings and
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 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:
Brushing Too Hard
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.
Gum Disease (Gingivitis)
When gum tissue becomes inflamed and
weakened from gingivitis (gum disease), you might have sensitive
gums and may feel tooth sensitivity because more of the underlying
dentine root surface is exposed.
If you teeth grind 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 near the sensitive tooth,
caused by conditions such as periodontal disease, can expose the
tooth's dentine and cause sensitivity. Brushing too vigorously or
frequently can also cause receding gums.
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