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.
What can I do about sensitive teeth?
Tooth sensitivity can be reduced by using a desensitizing toothpaste, applying sealants and other desensitizing ionization and filling materials including fluoride by your dentist. Decrease the intake of acid-containing foods.
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.
What can the dentist do for my sensitive teeth?
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