What Causes Sensitive Teeth?
Sensitive teeth occur when the tooth layer under your enamel which is called dentin becomes exposed. This can happen as a result of receding gums (root exposure), wear and erosion. The roots, which are not covered by hard enamel, contain thousands of tiny tubules leading to the tooth’s nerve chamber (the pulp). These dental tubules (or channels) allow the stimuli – for example, the hot, cold, or sweet food – to reach the nerve in your tooth, which results in pain.
Factors that can lead to/cause tooth sensitivity:
- Brushing too hard. Over time, brushing too hard or using a hard-bristled toothbrush can wear down enamel and cause the dentin to be exposed. It can also cause recession of the gums (the gum tissue pulls away from the teeth).
- Tooth decay near the gum line.
- Recession of the gums. As gums move away from a tooth due to conditions such as periodontal disease, the root surface becomes exposed.
- Gum disease (gingivitis). Inflamed and sore gum tissue may cause sensitivity due to the loss of supporting ligaments, which exposes the root surface that leads directly to the nerve of the tooth.
- Cracked teeth. Chipped or broken teeth may fill with bacteria from plaque and enter the pulp causing inflammation.
- Teeth grinding. Grinding or clenching your teeth may wear down the enamel and expose underlying dentin.
- Tooth whitening products or toothpaste with baking soda and peroxide. These products are major contributors to sensitive teeth.
- Plaque build-up. The presence of plaque on the root surfaces can cause sensitivity.
- Mouthwash use. 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). The acids further damage the dentin layer of the tooth. If you have dentin sensitivity, ask your dentist about the use of a neutral fluoride solution.
What Can I Do to Reduce Tooth Sensitivity?
- Maintain good oral hygiene. Continue to follow proper brushing and flossing techniques to thoroughly clean all parts of your teeth and mouth.
- Use a soft bristled toothbrush. This will result in less toothbrush abrasion to the tooth surface and less irritation to your gums. Brush gently and carefully around the gum line so you do not remove more gum tissue.
- Use desensitizing toothpaste. There are several brands of toothpaste available for sensitive teeth. With regular use you should notice a decrease in sensitivity. You may need to try several different brands to find the product that works best for you. Another tip. Spread a thin layer of the toothpaste on the exposed tooth roots with your finger or a Q-tip before you go to bed. Do not use a tartar control toothpaste; rather, use a fluoridated toothpaste.
- Watch what you eat. Frequent consumption of highly acid foods can gradually dissolve tooth enamel and lead to dentin exposure. They may also aggravate the sensitivity and start the pain reaction.
- Use fluoridated dental products. Daily use of a fluoridated mouth rinse can decrease sensitivity. Ask your dentist about available products for home use.
- See your dentist at regular intervals. Get professional tooth cleaning, oral hygiene instructions, and fluoride treatments every six months (or sooner depending on your condition).
- White fillings (bonding) to cover exposed root surfaces.
- Fluoride varnishes applied to the exposed root surface.