What causes sensitive teeth?
Beneath the enamel and gum line lies dentin, a layer filled with microscopic tubules that lead toward the nerve. When dentin is exposed, temperature changes and certain foods move the fluid inside these tubules and trigger a quick, sharp sensation. Common reasons dentin becomes exposed include:
- Gum recession, often from gum disease or brushing too hard, which uncovers the root surface
- Enamel wear from acidic drinks, reflux or a coarse toothbrush
- Notches at the gum line(cervical lesions), sometimes linked to heavy biting forces
- Teeth grinding or clenching, which can wear enamel and create micro-cracks
- Recent dental work such as fillings, scaling or whitening, which usually causes temporary sensitivity
Sensitivity can also be a symptom of something that needs different treatment, such as a cavity, a cracked tooth or an inflamed nerve. That is why finding the cause comes before choosing a solution.
Sensitivity or something more serious?
As a general guide, sensitivity is brief and stops within seconds once the trigger is removed. Pain that lingers for a minute or more, throbs on its own or wakes you at night suggests the nerve itself may be inflamed and may need root canal treatment. Sharp pain on biting, especially on release, can point to a crack; see our page on cracked tooth treatment. Only an examination can confirm the cause.
Who is treatment suited for?
Treatment is worthwhile for anyone whose sensitivity affects eating, drinking or brushing, or who has noticed it getting worse. Patients with receding gums, people who grind their teeth and those who have recently had whitening or deep cleaning are the most common groups we see. If gum disease is the underlying cause, the gums must be treated first, otherwise recession may continue.
How we treat tooth sensitivity at E&D Dental
- Find the cause. We ask when the pain happens and how long it lasts, then test individual teeth. The Q-ray intraoral camera helps reveal plaque, early decay and fine cracks, and X-rays check the nerve and root.
- Desensitizing treatment. For exposed dentin, we apply in-clinic desensitizing agents or fluoride varnish that help block the open tubules. This is quick and usually needs no anesthetic.
- Protective bonding. Worn notches or exposed roots can be covered with tooth-colored resin. See composite bonding for how this works.
- Treating the gums. When recession comes from gum inflammation, periodontal treatment helps stabilize the gums.
- Protecting against grinding. If clenching or grinding is involved, a custom night guard reduces wear and pressure on the teeth.
- Treating the nerve if needed. When sensitivity reflects an irreversibly inflamed pulp, root canal treatment may be the appropriate step. Any injection is given using our 3-step painless anesthesia system.
Aftercare and everyday habits
- Use a soft toothbrush with gentle, small strokes rather than hard scrubbing
- Try a desensitizing toothpaste daily; it can take a few weeks to have an effect
- Avoid brushing immediately after acidic food or drinks such as citrus, wine or carbonated drinks
- Drink acidic beverages with a meal rather than sipping them throughout the day
- Keep up regular scaling, since plaque at the gum line contributes to recession
Limitations to keep in mind
Desensitizing treatments often reduce discomfort but may need to be repeated, because their effect can fade as the surface wears. Bonding at the gum line can chip over time. Recession that has already occurred will not reverse with toothpaste alone. Sensitivity after whitening or scaling generally settles within days, but persistent pain should always be checked.
Why patients in Sanbon and Gunpo choose E&D Dental for sensitive teeth
- A cause-first approach rather than a single standard product for everyone
- Clear explanation of whether you need treatment now or simple home care
- Q-ray camera imaging that helps detect cracks and early decay
- Gum, bite and TMJ care available under one roof
- About a 5-minute walk from Sanbon Station, with Monday and Thursday evening hours
Sensitivity is easier to treat when it is caught before recession or wear progresses, so it is worth mentioning even if it feels minor. Tell us which teeth react, to what, and for how long; those details guide the diagnosis. If you are new to the clinic, read our guide to your first visit. International residents can request help with English communication when booking.