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Dr. Parvez A. Khan

Authors : Dr. Parvez A. Khan

Dentinal Hypersensitivity is very prevalent issue now a days.De sensitizing chewing gums and mouthwashes are also marketed. 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 desensitization and prevent re-polarization.

It is not known if this effect would occur with the twice-daily, transient and small increase in potassium ions in saliva that brushing with potassium-containing toothpaste creates. In individuals with dentin hypersensitivity associated with exposed root surfaces, brushing twice daily with toothpaste containing 5% potassium nitrate for six to eight weeks reduces reported sensitivity to tactile, thermal and air blast stimuli. However meta analysis reported that these individuals' subjective report of sensitivity did not significantly change after six to eight weeks of using the potassium nitrate toothpaste.

Desensitizing toothpastes containing potassium nitrate have been used since the 1980s while toothpastes with potassium chloride or potassium citrate have been available since 2000.It is believed that potassium ions diffuse along the dentinal tubules to inactivate intra dental nerves. However this has not been confirmed in intact human teeth and the desensitizing mechanism of potassium-containing toothpastes remains uncertain. Since 2000, several trials have shown that potassium-containing toothpastes can be effective in reducing dentin hypersensitivity, although rinsing the mouth after brushing may reduce their efficacy.

Studies have found that mouthwashes containing potassium salts and fluorides can reduce dentine hypersensitivity, although rarely to any significant degree. Nano-hydroxyapatite (nano- HAp) is considered one of the most biocompatible and bioactive materials, and has gained wide acceptance in dentistry in recent years.


Dr. Parvez A. Khan
Dr. Parvez A. Khan