Some causes of sensitive teeth include a recent filling, tooth decay, broken tooth, worn out enamel, cavities, brushing the teeth too hard, eating acidic foods and poor oral health, says Simplestepsdental. Certain dental procedures, such as bleaching, can lead to sensitivity. These factors result in exposed tooth roots and worn out enamel, leading to tooth sensitivity.
There are two types of tooth sensitivity: dentinal and pulpal sensitivity, notes Simplestepsdental. Dentinal sensitivity occurs due to the exposure of dentin. It becomes exposed when the enamel wears out, and this is caused by brushing teeth hard, cavities, poor oral hygiene and receding gums. Pulpal sensitivity occurs due to the tooth's pulp reaction, and it tends to affect a single tooth. Some of its causes include decay, recent filling, excess pressure from grinding and broken tooth.
People with sensitive teeth feel pain when drinking or eating hot things, drinking or eating cold things, eating sweet and touching teeth. Home measures that help to avoid tooth sensitivity include using a soft bristle toothbrush, brushing the teeth correctly, using toothpaste that soothe the nerve endings and using a high concentration fluoride toothpaste. Depending on a particular condition, dentists recommend a root canal, surgical gum graft, bonding, fluoride and desensitizing toothpaste, says Mayo Clinic.