Dentine Hypersensitivity

Dentine Hypersensitivity can occur after a number of different events:

  1. After periodontal treatment.
  2. If there is gum recession
  3. After using whitening toothpastes

Dentine is the root part of the tooth and it has many small tubes within it and these tubes go from the pulp or nerve in the tooth to the outer edge of the dentine. The dentine is usually covered by a fine layer of a material called Cementum. If this cementum is removed off the surface of the dentine than these small tubules become exposed to the mouth. The micrographs below show the tubules in the dentine and the surface of the dentine after the removal of the cementum.

                         dentinal-tubulesCS

                           Dentine

If we place cold fluids, metal or sweet liquids on the surface of the dentine than the fluid in the tubules will move and this will trigger the nerve inside the tooth and give you pain.  To treat dentine hypersensitivity we need to block the tubules and stop the fluid movement.  

Treatment of Dentine hypersensitivity can be achieved by a number of different methods:

  1. Desensitizing toothpastes (Examples being Colgate Pro-relief or any of the Sensodyne toothpastes).
  2. the dentist painting on the dentine a sealant film.
  3. If none of the above work than the dentist may place a filling in the tooth.

    Below is a micrograph of the dentine with the tubules blocked.

DentineBlocked