Hypersensitivity can occur when there is clinical exposure of open dentinal tubules
of a tooth or teeth.
The dentinal tubules
were almost completely occluded or narrowed in diameter due to the smear layer and accumulated debris (Figure 3).
Some of the variability may be due to variations in the direction of dentinal tubules
, the location within the dentin that fracture was initiated, the age of the patient/teeth, and experimental uncertainty, particularly the assessment of the initial contact point.
The study found that patients who brushed with cocoa-containing Theodent(TM) twice daily for seven days experienced " 100 percent dental occlusion ", meaning the dentinal tubules
of their tooth dentin were re-mineralized or repaired.
As CR is cured it tends to shrink, which may have a negative effect on the permanent penetration of the resin tags into the dentinal tubules
[Ferrari and Davidson, 1996].
Also, the viscosity of such hygroscopic formulations should be sufficiently low to enable rapid infiltration and penetration of dentinal tubules
and lateral canals without inducing aspiration of odontoblasts.
So when stimuli such as hot or cold foods and beverages reach exposed dentin, they cause the fluid in the dentinal tubules
to move, which disturbs the nerve endings and results in sensitive teeth pain.
ACP also precipitates on the surface and within the lumens of open dentinal tubules
to occlude them, resulting in decreased sensitivity.
2] of dentine exposes 20,000 to 45,000 dentinal tubules
According to the theory, fluid within the dentinal tubules
can flow in either an inward or outward direction depending on pressure differences in the surrounding tissue.
New Orajel(R) Advanced Tooth Desensitizer relieves hypersensitivity by sealing the dentinal tubules
, while still allowing bleaching agents to work within the enamel to remove discoloration.
Such a process might be useful for remineralizing dental carious lesions or for occluding open dentinal tubules
as a treatment for dental hypersensitivity.
This complex, SensiStat(R), seals off a tooth's open and exposed dentinal tubules
, thereby reducing tooth sensitivity.