For crown preparations, thin-film coating materials have been developed based on all-in-one adhesive technology for sealing of crown preparations and desensitizing hypersensitive dentin
2-4) It has been demonstrated that hypersensitive dentin
has a larger number of wide, opened dentinal tubules on the surface than does non-sensitive dentin.
Thrash WJ, Dorman HL, Smith FD: A method to measure pain associated with hypersensitive dentin.
A systemic method for the treatment of hypersensitive dentin, J Amer Dent Assoc1935;22:592.
To overcome the enigma of hypersensitive dentin several possible approaches have been proposed such as:
Old remedies and materials since decades used for management of hypersensitive dentin includes use of lung ash from mice, dried livers from lizards and salt lavage, potassium nitrate, alum, anodynes such as cocaine hydrochloride, clove oil, menthol, phenol, eugenol morphine sulfate or codeine sulfate.
This interference in the polarity of cell membranes by increasing the amplitude of the action potential of cell membranes can block the transmission of pain stimuli in hypersensitive dentin