To understand tooth sensitivity,
one needs to understand the anatomy of the tooth first. The
outer layer of the tooth is called the enamel. This forms a
bullet proof coating over the underlying sensitive part of the
tooth called the dentin. Contained within the central core of
dentin lies the pulp chamber containing a tiny nerve, artery
and vein. From this central pulp chamber millions of tiny nerve
ending travel through microscopic tubules throughout the dentin
and terminate at the dentin-enamel junction i.e. just beneath
the bullet proof enamel. These tiny tubule nerves are actually
surrounded by a cushion of fluid. Think of it as millions of
microscopic fluid filled straws each containing a tiny nerve.
Tooth sensitivity occurs
when the bullet proof enamel is lost causing exposure the dentin
and the tiny nerve endings. Temperature changes like cold and
hot or ph changes like sweet and sour foods cause the fluid
in the tubules to move. This fluid movement tugs on the tiny
nerves causing sensitivity and pain.
Abnormal tooth dehydration can also cause
tooth sensitivity. This
occurs with the use of tooth whitening/bleaching agents. This
is temporary as the sensitivity dissipates as rehydration occurs.
Those suffering from dry mouth can
therefore also suffer from sensitivity.
All forms of treatment are designed to SEAL the microscopic
tubules (dentin pores) thereby preventing nerve irritation and
sensitivity. It has been shown that with regular use, toothpaste
containing potassium nitrate or a prescription level of fluoride
can help seal the dentin pores. There are also professional
products available that your dentist can apply to the affected
area.
Please note: The application of these desensitizing agents
is addressing the symptoms and not the cause of your
tooth sensitivity.
Treatment would include a thorough dental evaluation and
treatment of any cavities and/or gum disease. If your tooth
sensitivity is associated with clenching/grinding, the use of
a night guard or now the more popular
anterior deprogrammer
is highly recommended. For immediate relief, the professional
application of a desensitizing agent is available.
One of the most common readily available products is
Sensodyne Toothpaste
and the name brand toothpastes for sensitive teeth. Its is the
opinion of dentist.net that over the counter products containing
potassium nitrate appear to be more effective than the fluoride
containing toothpastes. Please keep in mind that these
toothpastes are to be used for only 2-3 weeks at a time as
essentially these are numbing toothpastes.
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Contains maximum strength pain-relieving KNO3 as in
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More young adults prefer a paste/gel toothpaste combination
than any other age group
A new generation of toothpastes has recently been
launched and is gaining momentum not only to treat tooth
sensitivity from a more natural route but research is
promising in its anti-cavity fighting capabilities. These
remineralization toothpastes are showing evidence of being
able to reverse small cavities.