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Published on: December 20, 2024
Mechanical characterization of proanthocyanidin-dentin matrix interaction.
Carina Strano Castellan1, Patricia Nobrega Pereira, Rosa Helena Miranda Grande
1Department of Dental Materials, University of Sao Paulo, Sao Paulo, SP, Brazil.
Summary
Grape seed and cocoa seed extracts improve dentin's mechanical properties and stability. These proanthocyanidin (PA)-rich agents enhance short-term resin-dentin bonds, offering promising applications in dental treatments.
Area of Science:
- Biomaterials Science
- Dental Materials Science
- Polymer Chemistry
Background:
- Dentin matrix degradation affects dental restoration longevity.
- Cross-linking agents can enhance dentin's mechanical properties and stability.
- Proanthocyanidin-rich extracts offer potential as natural cross-linkers.
Purpose of the Study:
- To evaluate the effects of grape seed extract (GSE) and cocoa seed extract (COE) on demineralized dentin properties.
- To assess the impact of these cross-linking agents on resin-dentin bond strength.
- To determine the stability of treated dentin against enzymatic degradation.
Main Methods:
- Demineralized human dentin slabs were treated with GSE or COE.
- Elastic modulus and swelling ratio were measured after 10 or 60 minutes.
- Ultimate tensile strength (UTS) was assessed after collagenase exposure.
- Resin-dentin bond strength was evaluated after varying exposure times.
Main Results:
- Both GSE and COE increased dentin's elastic modulus with longer exposure.
- Treated dentin exhibited a reduced swelling ratio compared to controls.
- Dentin treated with GSE showed significantly improved resin-dentin bond strength.
- No adverse effects on UTS were observed after collagenase treatment.
Conclusions:
- Proanthocyanidin-rich cross-linkers (GSE, COE) enhance dentin mechanical properties and stability.
- The formation of a proanthocyanidin-collagen complex likely underlies these improvements.
- Short-term resin-dentin bonds can be effectively improved with just 10 minutes of dentin treatment.
