Cytotoxicity evaluation of single component dentin bonding agents.

Area of Science:

• Biomaterials Science
• Dental Materials
• Cytotoxicity Testing

Background:

• Dentin bonding agents are crucial in dental restorations.
• Evaluating the biocompatibility of these agents is essential for patient safety.
• Single-component agents offer simplified application but require thorough cytotoxicity assessment.

Purpose of the Study:

• To evaluate and compare the cytotoxicity of four single-component dentin bonding agents.
• To determine the impact of different bonding systems on cell viability.
• To identify potential differences in biocompatibility between total-etching and self-etching systems.

Main Methods:

• Cytotoxicity was assessed using the MTT assay on L 929 cell lines.
• Four single-component dentin bonding agents were tested: Syntac Single Component, Prime & Bond 2.1, Single Bond, and One Up Bond F.
• Agents were applied to dentin discs within dentin barrier models following manufacturer instructions.

Main Results:

• Three of the tested bonding agents (Syntac Single Component, Prime & Bond 2.1, Single Bond) resulted in approximately 60% cell survival.
• One Up Bond F, a self-etching system, exhibited significantly higher cell survival at 93%.
• A clear difference in cytotoxicity was observed, with the self-etching system being less toxic.

Conclusions:

• Single-component dentin bonding agents vary in their cytotoxic effects.
• Self-etching bonding systems demonstrate lower cytotoxicity compared to total-etching systems.
• These findings have implications for selecting biocompatible dental materials.