Functional response of osteoblasts in functionally gradient titanium alloy mesh arrays processed by 3D additive...

Area of Science:

• Biomaterials Engineering
• Cell Biology
• Tissue Engineering

Background:

• 3D printed Ti-6Al-4V alloy mesh structures offer potential for bone regeneration.
• Understanding osteoblast response to gradient architectures is crucial for implant design.

Purpose of the Study:

• To investigate osteoblast functions and cellular activity on 3D printed, functionally gradient Ti-6Al-4V alloy mesh.
• To assess the impact of pore size variation within gradient structures on cell behavior.

Main Methods:

• Cell culture studies using pre-osteoblasts on electron beam melted Ti-6Al-4V mesh with varying pore sizes (G1-G3).
• Analysis of cell proliferation, nuclear distribution, protein synthesis (actin, vinculin, fibronectin), and calcium deposition.

Main Results:

• Interconnected porous architecture supported osteoblast functions, with significant differences based on pore size.
• Gradient structures facilitated cell distribution from large to small pores, promoting extracellular matrix synthesis and calcium precipitation.
• High cell adhesion and proliferation were observed on mesh struts; actin and vinculin expression differed significantly, unlike fibronectin.

Conclusions:

• Functionally gradient Ti-6Al-4V mesh structures fabricated by electron beam melting influence osteoblast functions.
• Pore size in gradient architectures significantly impacts cell adhesion, proliferation, and differentiation, offering insights for orthopedic implant development.