The outer layer of tooth is Enamel which is tougher than bone.
Though it is a dead tissue, it does have certain touch sensation. It is because of the inner layer which have living cells. The enamel is
more tougher and will stop the cold and hot sensation to the greatest possible, not allowing to reach the inner layers. This is mainly done by the outer protein formed on the enamel.This is formed by the salivary proteins.This is very tough and more resistant to heat and cold.
But this layer can easily be removed by acids that are present in fruit juices like lemon,pineapple,grapes, water melon etc. These juices remove the layer formed on enamel (enamel pellicle) allowing the sensitivity to heat and cold, carry to the inner layers.
So, our teeth gets sensitized after these juices. But remember that this layer will again form on its own within 24-48 hours by precipitation of proteins from saliva.
Vigorous brushing or use of courser powder for brushing also result in removal of the pellicle in the early stages and enamel itself in later stages.
Most of the desensitizing pastes will contain chemicals like silver nitrate, strontium chloride etc . These metalic salts will precipitate the proteins from outer layer of enamel forming a tough outer layer which resist conduction of heat and cold. In this process they utilize the water (which 3-4% and gets reduced with age and causes brittleness of enamel as it reduces further). Prolonged use of these desensitizing pastes will result in more water loss from enamel and enamel will become brittle and chip off.
Physiological management by repeated intake of water number of times with little quantity will help a great in this situation.
No comments:
Post a Comment