Are Your Teeth Sensitive?

Is a taste of ice cream or a sip of hot coffee sometimes a painful experience for you?  Does brushing or flossing make you wince occasionally? If so, you may have a common problem called “sensitive teeth”.

What Causes Sensitive Teeth?

Cavities & fractured teeth can cause sensitive teeth.  But if your dentist has ruled these problems out, then worn tooth enamel, a cracked tooth (PDF) or an exposed root may be the cause.

A layer of enamel, the strongest substance in the body, protects the crowns of  healthy teeth.  A layer called cementum protects the tooth root under the gum line.  Underneath the enamel & the cementum is dentin, a part of the tooth that is less dense than enamel or cementum.

The dentin contains microscopic tubules (small hollow tubes or canals).  When the dentin loses its protective covering, the tubules allow heat & cold or acidic or sticky foods to stimulate the nerves & cells inside the tooth.  This causes hypersensitivity & occasional discomfort.  Fortunately , the irritation does not cause permanent damage to the pulp.  Dentin may  be exposed when gums recede. The result can be hypersenitivity  near the gum line.

Proper oral hygiene is the key to preventing gums from receding & causing sensitive tooth pain.  If you brush your teeth incorrectly or even over-brush, gum problems can result.  Ask your dentist if you have any questions about daily oral hygiene routine.

Treating Sensitive Teeth

Sensitive teeth can be treated.  Your dentist may suggest that you try a desensitising toothpaste which contains compounds that help block transmission of sensation from the tooth surface to the nerve.  Desensitising toothpaste usually requires several applications before the sensitivity is reduced.  When choosing toothpaste or any  other dental care products look for those that display the American Dental Associations’ Seal of Acceptance.

If the desensitising toothpaste does not ease your discomfort, your dentist may suggest in-office techniques.  A fluoride gel, which strengthens tooth enamel & reduces the transmission of sensations may be applied to the sensitive areas of the teeth.