Effects on dentin treated with eluted multi-mineral varnish in vitro

Area of Science:

• Dental biomaterials
• Cariology
• Mineralization

Background:

• Dental caries remains a significant global health issue.
• Remineralization strategies are crucial for caries management.
• Fluoride varnishes are widely used for caries prevention.

Purpose of the Study:

• To evaluate the non-contact effects of a sodium fluoride (NaF) varnish on dentin.
• To assess changes in morphology and elemental composition of sound and demineralized dentin.
• To investigate the potential of a multi-mineral varnish in an in vitro pH cycling model.

Main Methods:

• Bovine dentin cores were subjected to demineralization or used as sound controls.
• Specimens were treated with water (control) or a NaF varnish (non-contact).
• An in vitro pH cycling model simulated intraoral conditions, followed by SEM and EDS analysis.

Main Results:

• Non-contact NaF varnish promoted mineralization in both sound and demineralized dentin.
• Mineral depositions were observed in intertubular and intratubular regions.
• Demineralized dentin showed the most significant mineral deposition.

Conclusions:

• Acid-resistant mineral depositions occurred on dentin surfaces without direct varnish contact.
• A multi-mineral varnish containing fluoride, calcium, and phosphate demonstrated remineralization potential.
• Non-contact application may offer a novel approach to enhance dentin protection.