8 Tooth Sensitivity
Answers
Why are my teeth sensitive?
Tooth sensitivity is caused by the stimulation of cells within
tiny tubes located in the dentin (the layer of tissue found beneath the hard
enamel that contains the inner pulp). When the hard enamel is worn down or gums
have receded-causing the tiny tube surfaces to be exposed-pain can be caused by
eating or drinking food and beverages that are hot or cold; touching your
teeth; or exposing them to cold air.
Hot and cold temperature changes cause your teeth to expand and
contract. Over time, your teeth can develop microscopic cracks that allow these
sensations to seep through to the nerves. Exposed areas of the tooth can cause
pain and even affect or change your eating, drinking and breathing habits.
Taking a spoonful of ice cream, for example, can be a painful experience
for people with sensitive teeth.
Is tooth sensitivity a common condition?
Sensitive teeth are one of the most common complaints among
dental patients. At least 45 million adults in the United States and 5 million
Canadians, suffer at some time from sensitive teeth.
How can I avoid sensitivity?
Some toothpastes contain abrasive ingredients that may be too
harsh for people who have sensitive teeth. Ingredients found in some whitening
toothpastes that lighten and/or remove certain stains from enamel, and sodium
pyrophosphate, the key ingredient in tartar-control toothpastes may increase
tooth sensitivity.
To prevent sensitivity from occurring, use a soft-bristled
toothbrush. Avoid using hard bristled toothbrushes and brushing your teeth too
hard, which can wear down the tooth’s root surface and expose sensitive spots.
The way to find out if you’re brushing your teeth too hard is to take a good
look at your toothbrush. If the bristles are pointing in multiple directions,
you’re brushing too hard.
How do I know when it’s time to see a dentist?
If a tooth is highly sensitive for more than three or four days,
and reacts to hot and cold temperatures, it’s best to get a diagnostic
evaluation from your dentist to determine the extent of the problem. Before taking
the situation into your own hands, an accurate diagnosis of tooth sensitivity
is essential for effective treatment to eliminate pain. Because pain symptoms
can be similar, some people might think that a tooth is sensitive, when
instead, they actually have a cavity or abscess that’s not yet visible.
Sensitivity may be defined as a short sharp pain, which is
usually initiated by hot or cold foods or exposure to cold air. Aching often
follows. Because sensitivity may mean different things to a patient and dental
professional, be sure to clarify exactly what you feel when you discuss the
condition with your dentist. Be sure to tell the dentist when the pain started
and if there is anything, such as the application of a warm compress, that
helps eliminate the pain.
Do some products work to help decrease sensitivity?
Toothpastes for sensitive teeth usually contain a desensitizing
agent that protects the exposed dentin by blocking the tubes in the teeth that
are connected to nerves. In most cases, these products must be used on a
regular basis for at least a month before any therapeutic benefits may be
noticed.
What can the dentist do for my sensitive teeth?
Dentists have a variety of regimens to manage tooth hypersensitivity,
including both in-office treatments and patient-applied products for home use.
If you are diagnosed with dentin hypersensitivity, your dentist may apply a
desensitizing agent or a protective coating. You may be prescribed a stannous
fluoride gel or an over-the-counter desensitizing toothpaste containing
fluoride and either potassium nitrate or strontium chloride. These ingredients
help block transmission of sensation from the tooth to the nerve. It also might
help to massage the special paste onto your gums with your finger after
brushing.
What should I do after the dentist has applied a desensitizing
agent?
Listen closely to your dentist’s instructions. He or she may
advise you not to eat or drink for a short period of time, to eliminate all sources
of irritation, such as acidic foods or medication, highly concentrated foods or
flavored toothpastes. You may also be instructed to change oral hygiene habits
that are likely to cause abrasion or use a daily fluoride application (a rinse
or brush-on gel.)