Tissue Stabilization, Bacterial Adhesion, and Stem Cell Viability in Trans-cinnamaldehyde-conditioned Dentin.

Area of Science:

• Biomaterials Science
• Dental Materials Science
• Regenerative Dentistry

Background:

• Dentin conditioning is crucial for dental restorative procedures.
• Current methods may have limitations in stabilizing dentin matrix and biocompatibility.
• Trans-cinnamaldehyde (TC) is explored as a potential conditioning agent.

Purpose of the Study:

• To evaluate the efficacy of trans-cinnamaldehyde (TC) in conditioning dentin.
• To assess TC's impact on dentin tissue stabilization, collagen crosslinking, and resistance to biodegradation.
• To investigate TC's effect on bacterial adhesion and stem cell toxicity.

Main Methods:

• Human dentin beams were demineralized and treated with varying concentrations of TC, a vehicle control, or glutaraldehyde (GA).
• Collagen crosslinking was assessed via elastic modulus and hardness measurements.
• Biodegradation resistance, bacterial adhesion inhibition, and stem cell viability (using Cell Counting Kit-8 assay) were evaluated.

Main Results:

• TC demonstrated a concentration-dependent increase in dentin's elastic modulus and hardness.
• TC conditioning significantly improved biodegradation resistance, comparable to GA.
• All TC concentrations inhibited bacterial adhesion and maintained stem cell viability.

Conclusions:

• Trans-cinnamaldehyde effectively stabilizes dentin and prevents enzymatic degradation.
• TC acts as an effective antimicrobial agent on dentin surfaces.
• TC conditioning is biocompatible, preserving stem cell viability for potential regenerative applications.