A promising poly (e-caprolactone)/graphene-based scaffold as an antibacterial in regenerating bone tissue

Area of Science:

• Biomaterials Science
• Materials Science
• Nanotechnology

Background:

• Scaffolds are crucial 3D biomaterials for cell regeneration, particularly in bone remodeling.
• Poly(e-caprolactone) (PCL) combined with graphene is a developed scaffold material.
• Antibacterial properties are essential for scaffolds to prevent infection risks.

Purpose of the Study:

• To analyze the in vitro antibacterial characteristics of PCL/graphene scaffolds.
• To evaluate efficacy against Staphylococcus aureus (S. aureus) and Porphyromonas gingivalis (P. gingivalis).

Main Methods:

• Five groups were tested: PCL (negative control), Amoxicillin (positive control), and PCL/Graphene at 0.5 wt%, 1 wt%, and 1.5 wt%.
• Kirby-Bauer diffusion method was employed to assess antibacterial activity.
• Inhibition zone diameters were measured after 24-hour incubation with bacteria.

Main Results:

• PCL/graphene scaffolds demonstrated dose-dependent antibacterial activity against both S. aureus and P. gingivalis.
• Significant inhibition zones were observed at 1 wt% and 1.5 wt% graphene concentrations.
• The 1.5 wt% PCL/graphene scaffold showed the greatest inhibitory effect against P. gingivalis (IZD: 12.56 ± 0.06 mm) and S. aureus (IZD: 11.93 ± 0.92 mm).
• PCL and 0.5 wt% PCL/graphene showed no significant antibacterial activity.

Conclusions:

• Poly(e-caprolactone)/graphene scaffolds exhibit significant antibacterial properties against S. aureus and P. gingivalis at 1 wt% and 1.5 wt% graphene.
• These findings highlight the potential of PCL/graphene scaffolds for bone tissue regeneration applications due to their antimicrobial efficacy.