• 03-5413-7912

    By appointment only
    (operating hours 9:30~12:30/14:00~17:30 )

  • Directly connected to Roppongi Sta. Midtown Tower 6F

    Office hours: Mon-Sat 9:30~12:30/14:00~17:30
    Closed on Sundays and Holidays

Contact us


By appointment only
(operating hours 9:30~12:30/14:00~17:30 )

Contact Us

Toothache, sesitive tooth

Toothache, sesitive tooth

Mechanism of teeth

Toothache, sesitive tooth

Inside our teeth, there is a space called “pulp cavity” where the “pulp”, consisting of the nerves and blood vessels of the tooth, is distributed. The pulp is covered with dentin and the dentin is covered with enamel. The so-called “toothache” is caused by irritation to the pulp.

Causes of toothache

If you have a toothache, the first thing we may suspect is “tooth decay”. Other possibilities include “periodontal disease” and “hypersensitivity”.

Dental caries

Toothache, sesitive tooth Toothache, sesitive tooth

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In decayed teeth, the enamel is dissolved by the acid produced by bacteria in the mouth called C1. At this stage, there is no pain because the nerves of the tooth are not distributed in the enamel. However, if it progresses to C2, cold and sweet foods may begin to sting because part of the pulp is embedded in the dentin. In the C3 stage, the nerve itself becomes contaminated and causes severe pain. In the C4 stage, the nerve is dead and the toothache disappears.

Periodontal disease

Periodontal disease is an inflammation of the gums and bones that support the teeth. In severe cases, it can be accompanied by pain that is often confused with a toothache.


When dentin, which is essentially covered by enamel, is exposed for any reason, the nerves can be stimulated by cold liquids or wind. This is called hypersensitivity and can cause a sensation similar to pain. Dentin exposure can be caused by the lowered gums due to aging, or by tooth fracture (i.e., broken teeth). It can also be caused by excessive brushing.


Other causes include pain caused by wisdom teeth that do not grow normally, pain in the jaw joint felt when chewing due to temporomandibular joint disorder, trigeminal neuralgia felt while brushing your teeth, and toothache of unknown origin (i.e., atypical toothache).

Treatment for toothache

The treatment for a toothache depends on the cause.

Decayed teeth

Tooth decay treatment depends on how far the cavities have progressed. See “Treatment of tooth decay” for more information.

About “Treatment of tooth decay”

Periodontal Disease

In the treatment of periodontal disease, plaque control on a daily basis is important in addition to removal of plaque and tartar, and adjustment of your occlusion depending on the disease progress. See “Treatment of Periodontal Disease” for more information.

About “Treatment of periodontal disease”


Hypersensitivity may go away naturally if it is mild. In addition, fluoride application may strengthen the tooth structure and make the symptoms less likely to occur. Moderate sensitivities involves the treatment of exposed dentin with drugs and dental materials, and in severe cases, the nerve of the tooth may be removed.

Do you have these symptoms?

Each of our doctors has honed the skills and developed expertise in Japan or abroad.
We will work closely with you on your concerns.
Please feel free to consult with us.

Contact Us

Please feel free to contact us to make an appointment for a consultation
or to ask questions about your treatment.


You can call by tapping the number

  • By appointment only

  • Operating hours

  • Office Hours

  • Mon-Sat: 9:30~12:30

  • Closed

  • Sundays and Holidays

Office hours Mon Tue Wed Thu Fri Sat Sun/



9-7-1 Akasaka, Minato-ku, Tokyo 107-6206, Japan
Midtown Tower 6F

・ Directly connected to Roppongi Station on the Tokyo Metro Hibiya Line and Toei Subway Oedo Line.

・ 7 minutes walk from Nogizaka Station (exit 3) on the Tokyo Metro Chiyoda Line

・ Eight-minute walk from Roppongi 1-chome Station (Exit 1) on the Tokyo Metro Namboku Line

Terrestrial map

Tokyo Midtown Dental Clinic : Access map

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