Clean teeth.

• The first start is brushing your teeth to start attacking against plaque but DO NOT brush within an hour of eating acids because some foods soften the tooth anamel which makes it more vulnerable to erosion.
  
• The second defence is to floss which removes 40 per cent of plaque trapped between teeth that you cant reach with a toothbrush.
• Use a good toothpaste like Oral - B Pro - Expert because it's polyphosphate protects against tartar, this results in 56 per cent less build up than some other toothpastes.

Why do teeth become sensitive?
Inside each tooth is dentin -  a layer of microscopic hollow tubes that run from the outer tooth to the nerves inside.
When this layer loses its protective layer, the nerves can be simulated by heat, cold and cause discomfort whilst eating sweet or acidic foods.
Oral - B  Pro - Expert protects against sensitivity occuring .