Tooth sensitivity is caused by the outer protective layer know as enamel which has been broken down by either too many acids or sweet foods. Although many brands of toothpaste are good for general purposes, I would sensitivity it is better to utilise Sensodyne or Denquel. These two men were created specifically to be toothpaste for sensitive teeth better and contains Strontium chloride as well as Potassium nitrate. The first process including food sensitivity is to close down the open pores that had been left unprotected by the decayed enamel and this is where the Strontium chloride formula get to work. Once these open pores are being closed down Potassium nitrate eases the pain by calming the nerve endings of the tooth. It is important to make the correct purchase of tooth paste since others contain different formulas for various purposes such as to whiten the teeth or to be just a general purpose affordable paste.