What is tooth sensitivity?
Tooth sensitivity is pain or discomfort in one or more teeth that's triggered by hot, cold, sweet or sour foods and drinks or even by breathing cold air. The pain can be sharp, sudden and can shoot deep into the nerve endings of your teeth.
What causes tooth sensitivity ?
The causes of tooth sensitivity can be divided into two major categories
Damaged enamel due to:
Receding gums due to:
Why does tooth sensitivity occur ?
Tooth sensitivity occurs when the dentin (middle layer) of a tooth is exposed. Normally, the dentin is covered by enamel above the gum line and by cementum below the gum line. Dentin contains tiny openings called dentinal tubules. Inside each tubule lies a nerve branch that comes from the tooth's pulp. When the dentin is exposed to cold or hot, temperature or pressure affects these nerve branches. This causes tooth sensitivity.
How is tooth sensitivity treated?
There are two basic approaches to the treatment of dentinal hypersensitivity.