A Potassium Based Fluorine Containing Bioactive Glass for Use as a Desensitizing Toothpaste

Area of Science:

• Biomaterials Science
• Dental Materials
• Materials Chemistry

Background:

• Dentine hypersensitivity is a common dental condition.
• Conventional sodium-containing bioactive glasses (BAGs) are used in treatments.
• Potassium-releasing BAGs offer a potential alternative for enhanced efficacy.

Purpose of the Study:

• To investigate potassium-releasing BAGs as a novel treatment for dentine hypersensitivity.
• To compare the ion release and apatite formation of potassium BAGs with sodium BAGs.
• To evaluate the potential of potassium ions for nerve desensitization.

Main Methods:

• Potassium oxide substituted sodium oxide in a fluoride-containing BAG formulation.
• Bioactive glasses were immersed in artificial saliva and tris buffer.
• Ion release and pH changes were measured using ICP-OES and ISE.
• Material characterization included XRD, DSC, FTIR, and NMR.

Main Results:

• Both potassium and sodium BAGs showed amorphous structures and formed apatite.
• Potassium BAGs exhibited a higher glass transition temperature.
• Potassium BAGs dissolved slightly slower and released less fluoride due to fluorapatite nanocrystallization.
• Potassium ions were released, indicating potential for nerve deactivation.

Conclusions:

• Potassium-releasing BAGs are effective in occluding dentinal tubules and forming apatite.
• The release of potassium ions from BAGs presents a promising mechanism for dentine hypersensitivity management.
• Potassium BAGs may offer superior relief compared to sodium BAGs due to nerve desensitization properties.