ICDAS 5 and 6 are characterized by fully cavitated enamel and exposed dentin
. ADHA members can download the ADA Caries Classification System from the members-only digital edition of this issue of Access online Dentists and dental hygienists need a working knowledge of both the guideline and the ICDAS classifications.
By definition dentine hypersensitivity is "pain arising from exposed dentin
, in response to external stimuli such as thermal, tactile, osmotic or chemical that cannot be explained by any other form of dental defect or pathology." 
Consuming hot or cold foods and drinks can trigger the nerves inside the teeth when they reach the exposed dentin
tubules, resulting in pain.
The exposed dentin
and biodentine were both sealed with GIC.
Dentinal hypersensitivity is characterized as a sharp pain of short duration which is arising from exposed dentin
surfaces in response to stimuli, typically thermal, evaporative, tactile, osmotic, chemical or electrical; and which cannot be attributed as any other dental disease.1,2 Dentinal tubules can be exposed either by enamel or cementum loss.3
For the bonding procedures, Clearfil SE Bond (Kuraray, Osaka, Japan) was applied to the exposed dentin
surfaces according to the manufacturer's instructions.
Because mesiodistal reduction of the deciduous tooth leaves it with exposed dentin
that is prone to dental caries, composite restoration of the exposed dentin
surface is recommended as a preventative measure .
Eroded teeth displaying exposed dentin
very often need treatment with sealants or resin composite in order to prevent further loss of tooth substance [30-33].
It is also worth considering that high failure rates of ceramic laminate veneers have been related to large exposed dentin
Objective: Dentin desensitizing agents are used in the treatment of dentin hypersensitivity, which is defined as a painful response in the exposed dentin
to stimuli that are thermal, evaporative, tactile, osmotic, or chemical.
Dentinal hypersensitivity (DH) is described in the literature as a "pain derived from exposed dentin
in response to chemical, thermal tactile, or osmotic stimuli which cannot be explained as arising from any other dental defect or disease" .
Occluding agents act by physically covering or "plugging" the open, exposed dentin
tubules, thus preventing the effect of thermal changes or physical stimuli caused by the movement of dentin fluid resulting from pressure changes.