About Sensitive Teeth
What Causes Sensitive Teeth?
Tooth Sensitivity is Caused by the Exposure of
Dentine
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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 sensitive
sensation.
Some of the most common dental
conditions that can cause sensitive teeth include:
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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.
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Teeth Grinding
If you've been grinding your teeth when you
sleep, or in a habit of clenching your teeth frequently, you may be
wearing down enamel and exposing the underlying dentine layer of
your tooth.
Receding Gums
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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Learn More: Understanding Your Teeth