Ultra-Short Laser-Assisted Micro-Structure Formations on Mg/Zn Double-Doped Calcium Phosphate Ceramics for Enhanced...

Area of Science:

• Biomaterials Science
• Surface Engineering
• Microbiology

Background:

• Bacterial infections pose significant risks following medical implantations, exacerbated by rising antibiotic resistance.
• Developing antimicrobial surfaces for medical devices is crucial to prevent infections and improve patient outcomes.

Purpose of the Study:

• To create a novel calcium phosphate ceramic substrate with enhanced antimicrobial properties.
• To investigate the effect of laser-based surface patterning on antimicrobial characteristics.
• To evaluate the efficacy of doped metal ions (Mg and Zn) and surface texturing against bacterial contamination.

Main Methods:

• Preparation of Mg and Zn-doped β-tricalcium phosphate ceramic tablets via biomimetic precipitation and calcination.
• Application of laser-based patterning to create textured surfaces with varying roughness.
• Microscopic analysis of surface morphology and bacterial cell viability assays (using *Escherichia coli*).

Main Results:

• Laser processing significantly increased surface roughness (from 4.9 µm to 9.4 µm) with increased laser power and velocity.
• Textured surfaces altered bacterial cell morphology and led to a decrease in cell viability.
• The combination of Mg/Zn doping and laser patterning demonstrated potent antimicrobial effects.

Conclusions:

• Laser-based patterning of Mg/Zn-doped calcium phosphate ceramics offers a promising strategy for developing antimicrobial medical materials.
• Ultra-short laser radiation presents a potential alternative therapy for controlling bacterial infections on ceramic surfaces.
• This approach could mitigate risks associated with implant-associated bacterial infections and antibiotic resistance.