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Published on: July 10, 2014
In situ formation of amorphous cupric phosphate for improved dentin bonding
Yixiang Pan1, Jiajia Xu2, Xue Cai3
1First Clinical Division, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, China.
Summary
A novel pretreatment agent forms amorphous copper phosphate nanoparticles (Nano-ACuP) in situ, enhancing dentin bonding. This improves hybrid layer quality and bonding durability, offering a new strategy for dental adhesion.
Area of Science:
- Biomaterials Science
- Dental Materials Science
- Nanotechnology
Background:
- Poor penetration of bonding agents into demineralized dentin matrix (DDM) compromises hybrid layer quality and bonding durability.
- Developing effective pretreatment agents is crucial for improving dentin bonding performance.
Purpose of the Study:
- To design and evaluate a novel pretreatment agent forming amorphous copper phosphate nanoparticles (Nano-ACuP) in situ for enhanced dentin bonding.
- To investigate the effects of Nano-ACuP on dentin interfacial properties and bonding durability.
Main Methods:
- Investigated the effect of pretreatment agent concentration on water release.
- Characterized Nano-ACuP deposition, binding sites, hydrophilicity, surface charge, and mechanical properties.
- Evaluated bonding durability using microtensile strength and nano-permeability tests, alongside collagenase inhibition and antibacterial assays.
Main Results:
- In situ Nano-ACuP formed chemical bonds with dentin proteins, reducing interfacial hydration and surface potential.
- Nano-ACuP pretreatment enhanced dentin mechanical properties (Young's modulus, hardness) and promoted monomer penetration.
- Improved bonding strength and durability with minimal reduction after 1 year of water aging; demonstrated collagenase inhibition and antimicrobial activity.
Conclusions:
- Nano-ACuP pretreatment significantly enhances dentin bonding effectiveness and durability by optimizing the DDM interfacial microenvironment.
- This approach offers innovative strategies for advancing dental adhesive technology.