To understand the causes of sensitive teeth, we need to take a closer look inside the mouth and journey deep below the gum line. Only then will we get to the root of the problem.
In a healthy mouth, a layer of enamel protects the crowns of your teeth; this is the part that’s visible above the gum line. Under your gum line sits a layer of cementum, a specialised calcified substance covering the root of the tooth.
Beneath both the enamel and the cementum is dentine. Dentine is less dense than enamel and cementum and contains microscopic hollow canals known as tubules. When the underlying dentine loses its protective covering of enamel or cementum, these tubules allow hot, cold, acidic or sticky substances to reach the nerves and cells inside the tooth.