That sharp, brief pain when you eat ice cream or sip a hot cup of chai βΒ you know the feeling. Tooth sensitivity is one of the most common dental complaints, affecting about 1 in 3 adults at some point. While it may seem like a minor nuisance, sensitivity is almost always a sign that something needs attention.
Why Do Teeth Become Sensitive?
The inner layer of your tooth βΒ dentine βΒ contains thousands of microscopic tubules connected to the nerve at the centre (the pulp). When dentine is exposed, these tubules transmit sensations (hot, cold, sweet, pressure) directly to the nerve, causing that familiar sharp, shooting pain.
Dentine becomes exposed when the protective layers βΒ enamel or the gum tissue covering the root βΒ are compromised. Here's how that happens:
Common Causes of Sensitive Teeth
- Enamel erosion βΒ Acidic foods, carbonated drinks, acid reflux, and frequent vomiting dissolve enamel over time. Once gone, enamel cannot regenerate.
- Gum recession βΒ When gums pull back (from gum disease or over-brushing), the root surface is exposed. Roots have no enamel βΒ just bare dentine open to stimuli. Read our article on signs of gum disease.
- Tooth decay (cavities) βΒ Cavities create pathways through enamel to the underlying dentine. Even small cavities cause significant sensitivity.
- Cracked or chipped teeth βΒ A crack can run from the surface to the root, triggering sensitivity with biting or temperature changes.
- Teeth grinding (bruxism) βΒ Nightly grinding wears down enamel rapidly, often causing widespread sensitivity across multiple teeth.
- Over-aggressive brushing βΒ Brushing too hard with a stiff brush wears down enamel and causes gum recession over years.
- Whitening treatments βΒ Both professional and home whitening can cause temporary sensitivity, typically resolving within 48 hours.
- Recent dental work βΒ New fillings, crowns, or scaling can cause temporary post-treatment sensitivity for 1β2 weeks.
"Tooth sensitivity is your tooth telling you something has changed. It's rarely an emergency on its own βΒ but it should never be ignored. The earlier we identify the cause, the simpler the solution." βΒ Dr. Rahul Chaturvedi
Solutions for Sensitive Teeth
Treatment depends entirely on the cause. Here's what we typically recommend:
- Desensitising toothpaste βΒ Contains compounds (like potassium nitrate or stannous fluoride) that block tubules over time. Use consistently for 4β6 weeks for best results.
- Fluoride applications βΒ In-clinic fluoride varnish or gel strengthens enamel and reduces sensitivity. Can be applied at regular checkups.
- Dental bonding βΒ A tooth-coloured resin is applied to exposed root surfaces to seal and protect them.
- Gum grafting βΒ For significant gum recession, a gum graft covers exposed roots permanently.
- Night guard βΒ If grinding is the cause, a custom night guard worn during sleep protects enamel from further wear.
- Root canal treatment βΒ For severe sensitivity from pulp involvement, root canal treatment eliminates the nerve and resolves the sensitivity permanently.
- Addressing gum disease βΒ Scaling and root planing treats the underlying gum disease causing recession.
What to Avoid If You Have Sensitive Teeth
- Acidic foods and drinks (citrus, carbonated sodas, vinegar-based foods)
- Using a hard-bristle toothbrush or brushing side-to-side aggressively
- Using over-the-counter whitening products without professional guidance
- Ignoring the sensitivity and hoping it goes away on its own
