Dentin hypersensitivity

Dentin hypersensitivity (DH) is a common dental condition characterized by sharp transient pain arising from exposed dentin in response to thermal tactile osmotic or chemical stimuli. It occurs when the protective enamel or cementum is lost exposing dentinal tubules. According to the hydrodynamic theory movement of fluid within these open tubules stimulates nerve endings in the pulp causing pain. DH is most often seen in cervical areas due to gingival recession abrasion erosion or periodontal treatment. Management includes desensitizing agents (e.g. potassium nitrate strontium fluoride varnishes) tubule-occluding materials (resins bioactive glass) and laser therapy aiming to block nerve response or seal tubules.