Potassium nitrate is one ingredient found in toothpaste for sensitive teeth. It also occurs naturally in the environment as the mineral saltpeter. Dental hypersensitivity happens when the tooth dentine, the inner layer surrounding the tooth pulp, is exposed. The sensitive nerve is then vulnerable to outside stimulation, such as cold drinks. Potassium nitrate is effective as a tooth nerve desensitizer, according to a 2006 review article in the Australian Dental Journal. Exactly how potassium nitrate desensitizes the nerve of the tooth is unknown. One hypothesis is that the potassium ions reduce the sensory activity of the nerve. Consult your dentist if your teeth are sensitive to hot or cold liquids, as this sensitivity could also be due to cavities or gum disease.
Step 1
Purchase toothpaste containing 5 percent potassium nitrate. This concentration reduces tooth hypersensitivity, according to an article in the Australian Dental Journal.
Step 2
Apply a 1-inch strip of potassium nitrate toothpaste to your toothbrush. Brush for a minimum of one minute, making sure to brush all sensitive areas of your teeth.
Step 3
Brush with the potassium nitrate toothpaste twice a day. Your teeth will become less sensitive to hot and cold after two weeks of using the toothpaste.
Step 4
Use toothpaste that combines potassium nitrate with an occluding agent, as these agents close off the tubules that lead to the tooth dentine. Some occluding agents are calcium hydroxide, potassium oxalate, stannous fluoride and sodium fluoride. The combination toothpaste will provide additional relief for your sensitive teeth.
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