Effects of coating root dentin surfaces with adhesive materials.

Area of Science:

• Dentistry
• Biomaterials Science
• Cariology

Background:

• Root dentin demineralization is a significant concern in restorative dentistry, potentially leading to root caries.
• Dental adhesives are commonly used in restorations, but their role in preventing demineralization of root surfaces requires further investigation.

Purpose of the Study:

• To evaluate the efficacy of various dental adhesives in preventing root dentin demineralization.
• To assess the impact of adhesive coatings on the nanohardness of root dentin.

Main Methods:

• Root dentin surfaces were prepared and coated with different dental adhesives (Clearfil SE Bond, Clearfil Tri-S Bond, G-Bond, Hybrid Bond).
• Coated specimens were subjected to an artificial demineralizing solution.
• Coating thickness and demineralization depth were measured using confocal laser scanning microscopy (CLSM).
• Nanohardness of the coating and underlying dentin was assessed using nanoindentation.

Main Results:

• Adhesive coatings, except for one instance (Hybrid Bond, single coat), successfully prevented root dentin demineralization.
• The nanohardness of the dentin beneath the adhesive coatings remained comparable to that of untreated dentin.
• Confocal laser scanning microscopy confirmed the protective barrier effect of the adhesive layers.

Conclusions:

• Coating root dentin surfaces with dental adhesives is a viable and promising approach to prevent demineralization.
• Adhesive application can serve as a protective measure against root caries progression.
• Further research may explore long-term efficacy and optimal adhesive formulations for root surface protection.