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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)

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