Dentin hypersensitivity (DH, DHS) is dental pain which is sharp in character and of short duration, arising from exposed dentin surfaces in response to stimuli, typically thermal, evaporative, tactile, osmotic, chemical or electrical; and which cannot be ascribed to any other dental disease.
Source : Wikipedia
The most common form is dental sensitivity to cold temperatures - which, depending on the study, has been reported in 4% to 74% of people (note margin of error). It can affect any age-group.
The cause of dentine sensitivity has been extensively investigated - and there are currently several competing theories. Including the 'direct innervation theory' the ‘odontoblast receptor theory’, and the ‘hydrodynamic theory’ - that latter of which is the most commonly accepted. For details see :Journal of Conserv Dent. 13(4): 218–224
Several brands of toothpaste attempt to desensitize the exposed dentine. They typically use potassium nitrate, potassium chloride or potassium citrate. They can be an effective 'home treatment' - but the 'mechanism of action' has not been definitively confirmed
Potassium-containing toothpastes are common; however, the mechanism by which they may reduce hypersensitivity is unclear. Animal research has demonstrated that potassium ions placed in deep dentin cavities cause nerve depolarization and prevent re-polarization. […] It is believed that potassium ions diffuse along the dentinal tubules to inactivate intradental nerves. However, as of 2000, this has not been confirmed in intact human teeth and the desensitizing mechanism of potassium-containing toothpastes remains uncertain.
Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.
If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !
Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.
( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)
You are currently viewing an auto-translated version of Wikenigma
Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.
Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.