It occurs when the underlying layer of your teeth-the dentin-becomes exposed as a result of receding gum tissue (when the gums shrink away from the tooth exposing the root of the tooth). The roots, which are not covered by hard enamel, contain thousands of tiny tubules leading to the tooth’s nerve center (the pulp). These little tubules allow stimuli-for example, the hot, cold, or sweet food-to reach the nerve in your tooth, which results in the pain you feel. There are many factors that may lead to development of tooth sensitivity, including:
- Brushing too hard
- Recessed gums
- Gum disease
- Cracked teeth
- Teeth grinding
- Tooth whitening products
- Your age. Tooth sensitivity is highest between the ages of 25-30
- Plaque build-up
- Long-term use of some mouthwashes. Some over-the-counter mouthwashes contain acids that can worsen tooth sensitivity if you have exposed dentin (the middle layer of the tooth).
- Acidic foods
- Recent routine dental procedures. Sensitivity can occur following teeth cleaning, root planning, crown placement, and tooth restoration. Sensitivity caused by dental procedure is temporary and usually disappears in 4-6 weeks.
