IMMUNOLOGY

Detailed explanation-1: -Dentinal hypersensitivity is believed to result from movement of the fluid within the dentinal tubules, stimulating the nerves and leading to the characteristic pain of dentin hypersensitivity in the presence of stimuli. Common stimuli include: Hot or cold foods or drinks. Cold air.

Detailed explanation-2: -A. Dentin hypersensitivity can lead to reversible pulpitis if the sensitivity does not linger for more than a few seconds after the stimulus is removed. If it lingers for more than 30 seconds after the stimulus is removed, then most likely irreversible pulpitis has occurred.