ANATOMY

Detailed explanation-1: -The nerves responsible for dentine sensation are located in the pulp. If local pulpal inflammation develops, the local tissue pressure can increase. This would increase the outward flow of dentinal fluid and bring pulpal nerves closer to the threshold, thereby making them more sensitive than normal.

Detailed explanation-2: -Dentin is sensitive to stimuli due to the lesion extension of odontoblastic process and formation of dentin-pulp complex [1, 3, 6]. Dentin and pulp are histologically different.

Detailed explanation-3: -Dentin hypersensitivity may be related to excessive abrasion during tooth brushing, periodontal disease, or erosion from dietary or gastric acids, 2, 3, 49 and may be increased following scaling and root planning.

Detailed explanation-4: -Dentinal hypersensitivity (DH) is a common clinical condition usually associated with exposed dentinal surfaces. It can affect patients of any age group and most commonly affects the canines and premolars of both the arches.