[A scanning electron microscope study on resin bonding amalgam restoration in cavity]

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Biomaterials

Background:

• Amalgam restorations are prone to micro-leakage, potentially leading to secondary caries.
• Resin bonding agents offer a potential solution to improve the seal and longevity of amalgam restorations.
• Understanding the interface between resin, amalgam, and tooth structure is crucial for clinical success.

Purpose of the Study:

• To evaluate the effectiveness of resin bonding agents in creating a seal at the interface of resin bonding amalgam restoration (BAR) using scanning electron microscopy (SEM).
• To assess the bonding quality between resin bonding agents, amalgam, enamel, and dentin.

Main Methods:

• Sixty-five healthy teeth were used, divided into a control group (regular amalgam) and three experimental groups (BAR with different resin bonding agents).
• Sections of the teeth were analyzed using scanning electron microscopy (SEM) to examine the resin-amalgam-tooth interface.
• Evaluation focused on micro-leakage and the integrity of the seal at the bonding interface.

Main Results:

• Resin bonding agents successfully filled gaps, preventing micro-leakage between amalgam and both enamel and dentin.
• Complete sealing of dentin tubules was observed with the use of resin bonding agents.
• A strong bond was achieved between enamel, dentin, and amalgam.
• Chemical curing resin bonding agents demonstrated superior performance over light curing agents.

Conclusions:

• Resin bonding amalgam restoration (BAR) significantly reduces micro-leakage around amalgam restorations.
• BAR presents a promising method for preventing secondary caries.
• Chemical curing agents are recommended for better bonding outcomes in BAR.