Bioactive Glass Empowered Mineralizable Hydrogel for Effective Dentinal Tubule Occlusion

Area of Science:

• Biomaterials Science
• Dental Research
• Nanotechnology

Background:

• Dentin hypersensitivity (DH) is caused by exposed dentinal tubules.
• Tubular occlusion is the most effective treatment for DH.
• Bioactive glasses (BGs) can form hydroxyapatite (HAp) for sustainable tubular occlusion but have poor maneuverability.

Purpose of the Study:

• To develop a pH-neutral bioactive glass (PSC) integrated into a polyvinyl alcohol hydrogel for enhanced DH management.
• To create a composite system for stable tubular occlusion via induced HAp formation.
• To improve the maneuverability and intraoral retention of BGs for DH treatment.

Main Methods:

• A ternary Ca-P-Si bioactive glass (PSC) was synthesized.
• PSC particles were integrated into a polyvinyl alcohol hydrogel using a two-step solvent exchange process.
• In vitro studies assessed HAp formation, mineralization activity, and tubular occlusion.

Main Results:

• The composite hydrogel demonstrated robust anchoring of PSC particles, improving intraoral retention.
• The hydrogel exhibited favorable aqueous permeability for mineral precursor transport.
• Rapid mineralization activity induced HAp formation, efficiently occluding exposed dentinal tubules in vitro.

Conclusions:

• The composite hydrogel offers a promising, minimally invasive strategy for durable DH management.
• The system achieves stable tubular occlusion through induced HAp formation.
• Improved maneuverability and sustained HAp production address limitations of current BG therapies for DH.