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Updated: Sep 29, 2025
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Development of Amelogenin-chitosan Hydrogel for In Vitro Enamel Regrowth with a Dense Interface
Published on: July 10, 2014
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EDTA-chitosan is a feasible conditioning agent for dentin bonding
Yi Zhou1, Yuming Zhao2, Jianmin Han3,4
1Department of Pediatric Dentistry, School and Hospital of Stomatology, Peking University, No. 22 South Street, Zhongguancun, Haidian District, Beijing, 100000, China.
Clinical Oral Investigations
|March 23, 2022
Summary
EDTA-chitosan offers superior dentin bonding strength and durability compared to phosphoric acid. This novel chelating agent also demonstrates lower cytotoxicity, presenting promising clinical applications for direct bonding restorations.
Area of Science:
- Biomaterials Science
- Dental Materials
- Nanotechnology
Background:
- Effective dentin bonding is crucial for the longevity of dental restorations.
- Current bonding agents like phosphoric acid have limitations, including potential cytotoxicity and suboptimal bond durability.
- Developing novel biomaterials with enhanced bonding properties and reduced adverse effects is an ongoing research priority.
Purpose of the Study:
- To compare the bonding effects of EDTA-chitosan, phosphoric acid, and SE-Bond on dentin.
- To evaluate the material properties, bond strength, durability, and cytotoxicity of EDTA-chitosan.
- To assess the potential of EDTA-chitosan as a direct bonding agent for dentin restoration.
Main Methods:
- Synthesis and characterization of EDTA-chitosan.
- Microscopy techniques (TEM, SEM, LConfocal) to analyze demineralization and bonding interfaces.
- Microtensile bond strength and stereomicroscope analysis for bond durability.
- CCK8 cytotoxicity assay and microfluidic experiments to assess biocompatibility.
Main Results:
- EDTA-chitosan effectively demineralizes dentin collagen fibers extrafibrillarly, retaining intrafibrillar minerals.
- SEM confirmed smear plug retention with EDTA-chitosan conditioning.
- Laser confocal microscopy revealed favorable resin-dentin interfacial formation.
- Microtensile bond strength tests showed EDTA-chitosan achieved bonding strength and durability comparable to SE-Bond and superior to phosphoric acid (P < 0.05).
- EDTA-chitosan exhibited lower cytotoxicity than phosphoric acid and SE-Bond in CCK8 assays and microfluidic experiments.
Conclusions:
- The EDTA-chitosan extrafibrillar demineralization strategy enhances bonding by retaining intrafibrillar minerals.
- This approach results in superior bonding strength and durability with reduced cytotoxicity compared to conventional agents.
- EDTA-chitosan shows significant potential for direct bonding restorations in clinical dentistry due to its favorable properties.
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