Laser-Treated Surfaces for VADs: From Inert Titanium to Potential Biofunctional Materials

Area of Science:

• Biomaterials Science
• Surface Engineering
• Cardiovascular Engineering

Background:

• Cardiovascular diseases are a leading cause of death globally.
• Congestive heart failure requires advanced treatments like mechanical circulatory assistance.
• Current ventricular assist devices use polished titanium, but surface bioactivity can be improved.

Purpose of the Study:

• To develop a biofunctional titanium surface for ventricular assist devices using laser processing.
• To enhance cell adhesion and neointimal tissue formation without coatings.
• To improve the performance of existing biomaterials.

Main Methods:

• Femtosecond laser ablation was used to create laser-induced periodic surface structures (LIPSS).
• Surface topology was optimized for cell adhesion and tissue formation.
• In vitro evaluation of fibroblast cell adhesion and proliferation was performed.

Main Results:

• Laser processing successfully created the desired surface topology.
• Fibroblast cells demonstrated appropriate adhesion and distribution compared to controls.
• In vitro results indicated enhanced cell adhesion and proliferation with LIPSS.

Conclusions:

• Laser processes can create novel interactions on known biomaterials.
• The developed biofunctional surface improves titanium's suitability for ventricular assist devices.
• This approach offers a promising strategy for enhancing mechanical circulatory support technologies.