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Development of Amelogenin-chitosan Hydrogel for In Vitro Enamel Regrowth with a Dense Interface

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Etch-mineralizing treatment to improve dentin bonding.

Yaoxin Wang¹, Ning Ding¹, Zhenyu Zong¹

¹Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing 100050, China.

Journal of Dentistry

|September 29, 2022

Summary

This study shows that etch-mineralizing solutions (EMs) enhance dentin bonding and remineralization. EMs improve bonding strength, microhardness, and antibacterial properties, offering a new strategy for dental restorations.

Keywords:

Antibacterial properties Autologous mineral element Etch- mineralizing Fluorine Shear bond strength

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Area of Science:

Biomaterials Science
Dental Materials
Nanotechnology

Background:

Dentin bonding is crucial for dental restoration longevity.
Current treatments face challenges in achieving durable and remineralizing effects.
Developing agents that improve bonding and intrinsic dentin properties is essential.

Purpose of the Study:

To evaluate the efficacy of novel etch-mineralizing solutions (EMs) as a dentin treatment agent.
To investigate the impact of EMs on dentin bonding, microhardness, and mineralization.
To assess the antibacterial properties and nanoleakage of EMs-treated dentin.

Main Methods:

Four EMs with varying sodium fluoride concentrations in 35% phosphoric acid were prepared (F1-F4).
Dentin was treated with EMs or 35% phosphoric acid gel (control).
Techniques included SEM, EDS, FTIR, microhardness testing, shear bond strength (SBS) testing, nanoleakage evaluation, and antibacterial assays.

Main Results:

EMs removed the smear layer and induced mineralization on dentin surfaces and tubules.
FTIR analysis showed significantly increased phosphate/collagen ratios in EMs-treated dentin.
The F2 group exhibited the highest bonding strength (32.14 MPa) and microhardness (66.08), with reduced nanoleakage and improved antibacterial properties compared to the control.

Conclusions:

EMs treatment significantly enhances dentin bonding strength and microhardness.
EMs promote dentin remineralization using autologous mineral elements.
This novel approach offers improved dentin bonding, antibacterial effects, and restoration longevity.