Re-Mineralization By Polyelectrolyte Nanocomposite For Effective Against Dentin Hypersensitivity

Area of Science:

• Biomaterials Science
• Dental Research
• Nanotechnology

Background:

• Dentin hypersensitivity (DH) results from exposed dentinal tubules (DTs), causing discomfort and enabling bacterial invasion.
• A need exists for dental treatments that can both seal DTs and prevent caries.

Purpose of the Study:

• To develop and evaluate a novel material, PCA, for its efficacy in occluding DTs and preventing caries.
• To assess the mineralization, sealing, mechanical, antibacterial, and biocompatibility properties of PCA.

Main Methods:

• PCA, a composite of polyaspartic acid (Pasp), carboxymethyl chitosan (CMC), and amorphous calcium phosphate (ACP), was synthesized.
• Mineralization was assessed using collagen models; DH models evaluated DT occlusion.
• Sealing, hardness, antibacterial activity (against *S. mutans*), and biocompatibility were tested.

Main Results:

• PCA facilitated rapid intrafibrillar mineralization and effectively occluded DTs within 5 days.
• PCA-treated dentin showed enhanced resistance to friction and acid, restored airtightness and mechanical strength.
• PCA demonstrated significant antibacterial activity against *S. mutans* and favorable biocompatibility.

Conclusions:

• PCA exhibits a dual function in managing DH by occluding DTs and preventing caries through antibacterial action.
• The findings support PCA's potential for clinical application in dental treatments.