PGCEE MDS 2022: The dentin desensitizing agents that acts by precipitating proteins in the dentinal tubular fluid is:

 # The dentin desensitizing agent that acts by precipitating proteins in the dentinal tubular fluid is:

a) Strontium Chloride 

b) Potassium oxalate

c) Fluoride 

d) Hydroxyethyl methacrylate

The correct answer is A. Strontium chloride.

Dentin Desensitizers act by:

i) Desensitization of intradental nerves or inhibit or prevent transmission of the stimulus itself.

Eg: Potassium salts like nitrate, chloride and citrate.

ii) Occlusion of the dentinal tubules

a) Precipitation of proteins:

• Silver nitrate

• Zinc chloride

• Strontium chloride

b) Plugging of dentinal tubules

• Salts of fluorides and oxalates

• Bioglass

c) Dentin adhesive sealers

• Varnish

• GIC

• Composites

• Dentin bonding agents

iii) Lasers:

• Nd-YAG-act by occlusion of tubules

• GaAlA (Gallium Aluminium Arsenide laser act by affecting the neural transmission)