Comparing the Effectiveness of Different Dentinal Desensitizing Agents: In Vitro Study

Area of Science:

• Dental Materials Science
• Biomaterials
• Oral Health Research

Background:

• Dentine hypersensitivity is a common clinical concern.
• Occluding dentine tubules is a primary mechanism for desensitization.

Purpose of the Study:

• To compare the in vitro effectiveness of monopotassium-monohydrogen oxalate, RMGI XT VAR, and LIQ SiO2 in reducing dentine permeability.

Main Methods:

• Fluid filtration device used to measure dentine permeability under controlled pressure.
• Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) analyses for morphological and elemental evaluation.
• Dentine discs subjected to treatments, artificial saliva storage, and citric acid challenges.

Main Results:

• All tested agents significantly reduced dentine permeability after acid challenge.
• Monopotassium-monohydrogen oxalate demonstrated a statistically significant greater reduction in permeability compared to RMGI XT VAR and LIQ SiO2 (p < 0.05).
• SEM/EDX confirmed mineral precipitate formation occluding dentine tubules for all agents.

Conclusions:

• 2.7% wt. monopotassium-monohydrogen oxalate is a highly effective agent for reducing dentine permeability in vitro.
• The occluding effect on dentine tubules contributes to the desensitizing properties of the evaluated agents.