Tooth Sensitivity: Causes and Treatments
NOTHING RUINS A COZY mug of hot cocoa faster than the jolt of pain from sensitive teeth. As many as one in eight people in the U.S. deal with tooth sensitivity, including kids! What causes it and what can we do to protect our teeth?
Understanding Dental Anatomy
In a healthy tooth, there is the protective outer layer of enamel, then the porous, bony middle layer of dentin, and finally the pulp chamber at the centre, which contains nerves and blood vessels. The way the nerves in the pulp chamber get sensory input (for things like pressure and temperature) is through the thousands of microscopic tubules that run through the dentin.
Too Much Sensory Input
When the protective enamel layer wears away, the tubules in the dentin become exposed, and the nerves suddenly get much more stimulation than they like. This is what makes enamel erosion one of the main causes of tooth sensitivity. Without enamel, the nerves get a nasty shock whenever anything too hot or cold, or even too sweet or sour, touches the outside of the tooth.
What Else Causes Sensitivity?
Root exposure from gum recession also leads to sensitivity. The enamel only covers the crown of the tooth, not the roots, which are protected by the gums. If the gums recede due to teeth grinding, over-brushing, or gum disease, it leaves the roots exposed. Cavities and tooth injuries can cause sensitivity as well.
Are You Protecting Your Teeth?
Fortunately for all of us, there are ways to fight back, even if our teeth are already sensitive. Using a soft-bristled brush will help prevent further enamel erosion or gum recession. We don’t actually need stiff bristles to clean our teeth effectively. There is also special toothpaste formulated for sensitive teeth. Avoiding sugary and acidic foods and drinks (particularly soda) is also a good idea.
The Dentist Can Help!
Don’t suffer tooth sensitivity in silence; let the dentist know! In addition to being able to determine the cause of the problem, the dentist can do things to help protect your teeth, such as applying a fluoride varnish to make your enamel stronger, prescribe a desensitizing toothpaste, or in a severe case, perform a dental restoration or recommend a gum graft to cover exposed roots.