Fabrication of customized open-cell titanium foams by direct foaming for biomedical applications

Fabrication of customized open-cell titanium foams by direct foaming for biomedical applications

WoS Article

Titanium (Ti) foams offer a promising alternative for bone reconstruction and repair due to their high porosity and lower stiffness compared to solid metals, which improves in vivo osseointegration by reducing the stress shielding effect and allowing bone ingrowth. In this work, customized Ti foams were successfully fabricated for the first time at room temperature using a direct foaming method. Ti powder suspension with a water-soluble surfactant and environmentally friendly thickener was foamed by mechanical stirring. Then, 3D-printed moulds were utilized to achieve near-net shape foams, which were subsequently consolidated by sintering, thus avoiding the need for complex processing of molten Ti. The resulting Ti foams exhibited a cancellous-like open-cell structure, high porosity (> 80%), and a five times higher effective surface area than a 3D Ti mesh with a primitive cubic-based cell fabricated by additive manufacturing. In addition, the Ti foams exhibited similar mechanical properties to cancellous bone and facilitated the adhesion, proliferation, and maturation of human osteoblasts in vitro.

Titanium (Ti) foams offer a promising alternative for bone reconstruction and repair due to their high porosity and lower stiffness compared to solid metals, which improves in vivo osseointegration by reducing the stress shielding effect and allowing bone ingrowth. In this work, customized Ti foams were successfully fabricated for the first time at room temperature using a direct foaming method. Ti powder suspension with a water-soluble surfactant and environmentally friendly thickener was foamed by mechanical stirring. Then, 3D-printed moulds were utilized to achieve near-net shape foams, which were subsequently consolidated by sintering, thus avoiding the need for complex processing of molten Ti. The resulting Ti foams exhibited a cancellous-like open-cell structure, high porosity (> 80%), and a five times higher effective surface area than a 3D Ti mesh with a primitive cubic-based cell fabricated by additive manufacturing. In addition, the Ti foams exhibited similar mechanical properties to cancellous bone and facilitated the adhesion, proliferation, and maturation of human osteoblasts in vitro.

Titanium; Metallic foam; Scaffold; Direct foaming; Robocasting; Osteoblast

Titanium; Metallic foam; Scaffold; Direct foaming; Robocasting; Osteoblast

OLIVER URRUTIA, C.; CASAS LUNA, M.; KOLEDOVÁ, Z.; SLÁMEČKA, K.; ZIKMUND, T.; KAISER, J.; ČELKO, L.; MONTUFAR JIMENEZ, E.

2025

01.11.2024

ELSEVIER

AMSTERDAM

2238-7854

Journal of Materials Research and Technology-JMR&T

33

11

Federative Republic of Brazil

1704

1714

11

https://www.webofscience.com/wos/woscc/full-record/WOS:001324667400001

http://hdl.handle.net/11012/249756

1-s2.0-S2238785424021410-main