The tooth roots are protected by gums. But if the enamel is worn down or if the gum line has receded, then the dentin becomes exposed. "Cavities, cracked teeth, gum recession, the enamel, and root erosion all cause dentin to be exposed," Culotta-Norton said.
Your teeth can feel sensitive when you take a drink of cold beverage, bite into an apple, cleaning, filling, or being worked on at the dentist's office. Sometimes people can cause tooth sensitivity by habitually grinding their teeth or clamping their jaw tightly.
The most frequent cause of tooth sensitivity to temperature, sweet, and sour foods is exposure of the dentin, which is the hardened tissue just below the tooth's enamel that contains microscopic nerve fibers. Dentin can become unprotected as a result of dental decay, food or toothbrush abrasion, gum recession, or sensitivity to temperature in some way, which could mean that one or more teeth are tapping too soon or too hard because they have moved slightly out of place.
Tooth sensitivity has become a common problem nowadays and there are about 40 million adults in the United States who suffer from this problem. Yes, you read it right! I mean 40 million is such a huge number and we can’t ignore this fact. There is no fixed age group for this problem as it can happen to anyone.
Basically, tooth sensitivity involves sudden ache or pain in teeth whenever we eat something hot or cold. In some people, this pain is very sharp and their teeth get hurt badly. However, it’s a temporary problem which gets fixed after some time. There are some things like hot and sour foods, chilled water, or something with high and low temperature which can increase sensitivity in our teeth. Fortunately, the treatment of sensitive teeth is possible and you can find an easy solution to this problem.
Enamel is a hard layer and acts as a protective agent for the underlying layer of dentin in our teeth. And dentin is softer than enamel. Tooth roots of human beings are protected by gums if both are gone or torn away, they cause sensitivity.
Tooth sensitivity can be caused by various factors which are given below: