A chemical mix imitating the minerals found in saliva, but at higher concentrations, can be added to toothpaste to plug tiny pores that lead to nerves. The exposed pores lead to nerves, causing pain and sensitive teeth.
Now, a new ingredient in toothpaste, developed by dentists, called Novamin, can dramatically reduce teeth sensitivity. Teeth become sensitive when gum tissue recedes, exposing a tooth's roots. Roots contain small holes or tubules that lead to nerves. Novamin plugs up the holes cutting off contact with nerves and eliminating pain.
It is made from a compound from elements naturally critical for bone and tooth mineralization: calcium, phosphorus, silica and sodium. In their common forms, these elements have very limited value in tooth healthy. But in their rare ionic form, they can make teeth stronger and help eliminate tooth sensitivity.