Comparison of Microleakage under Amalgam Restoration: An In Vitro Study

Area of Science:

• Restorative Dentistry
• Dental Materials Science

Background:

• Microleakage is a significant concern in amalgam restorations, potentially leading to secondary caries and pulpal issues.
• Dental varnish and silver diamine fluoride (SDF) are used as protective agents under restorations, but their comparative efficacy against microleakage requires further investigation.

Purpose of the Study:

• To compare the microleakage of dental varnish versus SDF when used as a base under amalgam restorations.
• To evaluate the effectiveness of SDF as an alternative to traditional dental varnish in preventing marginal leakage.

Main Methods:

• Class I cavities were prepared in 20 premolar teeth.
• Teeth were restored with amalgam, with group I receiving dental varnish and group II receiving SDF as a base.
• Microleakage was assessed using a methylene blue assay and stereomicroscopic evaluation.

Main Results:

• Samples treated with dental varnish (Group I) exhibited significantly less microleakage compared to those treated with SDF (Group II).
• Statistical analysis revealed a p-value <0.002, indicating a highly significant difference between the groups.

Conclusions:

• Dental varnish demonstrated superior performance in reducing microleakage under amalgam restorations compared to SDF.
• SDF is not recommended as a substitute for dental varnish in this clinical application.