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Published on: March 2, 2020
An Anti-saliva contamination Bonding Strategy Based on Polycation Assembly
1Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou 310000.
A new polycation assembly strategy effectively prevents saliva contamination during dental bonding. This method creates a durable, antibacterial hybrid layer, improving dentin bonding and oral health outcomes.
Area of Science:
- Biomaterials Science
- Dental Materials Science
- Nanotechnology
Background:
- Saliva contamination poses a significant threat to dentin bonding, crucial for modern dentistry.
- Contamination leads to bacterial biofilm formation and poor adhesive infiltration, compromising bond durability.
- Existing methods struggle to overcome saliva's detrimental effects on dentin bonding.
Purpose of the Study:
- To develop a novel strategy to counteract saliva contamination in dentin bonding.
- To create a robust, antibacterial, and defect-low hybrid layer resistant to salivary contaminants.
- To enhance the long-term durability of dental adhesive restorations.
Main Methods:
- A polycation assembly-assisted bonding strategy was employed.
- Bactericidal polycations were electrostatically adsorbed onto demineralized dentin matrix (DDM).
- The polycation/DDM complex formation was analyzed for its effects on hydration, bacterial load, and protein adsorption.
Main Results:
- The strategy effectively killed residual and salivary bacteria, dehydrating the DDM and improving adhesive infiltration.
- Polycation adsorption reversed DDM surface charge, leading to continuous adsorption of salivary proteins.
- A stable polycation/DDM/saliva protein complex was formed, actively mitigating saliva contamination effects.
- This resulted in the first persistently antibacterial and defect-low hybrid layer under saliva contamination conditions.
Conclusions:
- The polycation assembly strategy offers a promising solution to saliva contamination challenges in dentin bonding.
- This approach significantly enhances hybrid layer quality and durability, addressing a critical issue in restorative dentistry.
- The developed method holds potential for improving the longevity and success of dental restorations worldwide.
