Hypersensitivity question

Dentinal hypersensitivity is…

a short and sharp pain that arises from exposed dentine in response to stimuli such as temperature or osmotic shifts, and which cannot be attributed to any other dental defect or pathology.

Hydrodynamic theory

According to this theory, the pain is caused by the movement of fluid within the dentinal tubules. When a stimulus hits exposed dentine, it causes fluid inside the tubules to move. This fluid movement stimulates nerve endings in the pulp, resulting in a pain response.

Duraphat for sensitivity

• Active ingredient: 22600ppm sodium fluoride

• MOA: Reacts with hydroxyapatite to form calcium fluoride on the tooth surface. This occludes dentinal tubules, reducing fluid movement. Additionally, it provides a fluoride reservoir for protection against cariogenic acid attack.

Superseal

• Active ingredient: Potassium oxalate

• MOA: Reacts with hydroxyapatite to form calcium oxalate crystals within dentinal tubules. This precipitate is biologically bound to vital dental substrate, leading to a long-lasting seal. Being water-based, it also re-wets the substrate to re-establish the collagen for bonding.

Colgate sensitive pro relief toothpaste

• Active ingredient: Arginine, calcium carbonate and sodium fluoride.

• MOA: Arginine and calcium carbonate plug and seal dentinal tubules. Regular use builds a long-lasting protective barrier against sensitivity.

Sensodyne rapid relief

• Active ingredient: stannous fluoride and sodium fluoride (1450ppm)

• MOA: Dual mechanism of tubule occlusion and antibacterial activity. Stannous ions react with exposed dentine to form a layer that physically blocks open tubules. It also inhibits plaque formation, improving gingival health.