Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 24: Non-equilibrium Phenomena in Materials Induced by Electrical and Magnetic Fields 4
MM 24.4: Vortrag
Mittwoch, 7. September 2022, 16:45–17:00, H45
Field assisted sintering of piezoelectric-bioactive scaffolds for bone tissue engineering — •Abdullah Riaz1, Christian Polley1, Eberhard Burkel2, and Hermann Seitz1 — 1Chair of Microfluidics, Faculty of Mechanical Engineering and Marine Technology, University of Rostock, Rostock, Germany — 2Institute of Physics, University of Rostock, Rostock, Germany
The treatment of critical size bone defects is still a challenge. The external material is often needed to support bone and guide tissue regeneration by physical stimulation. Promising effects of electrical stimulation on bone cell growth have led to an interest in using piezoelectric ceramics for tissue repair. Nevertheless, it is still concerning due to the toxicity of ceramics, which exhibit ion dissolution in biological fluids. In this study, nanostructured pure and doped calcium titanate is prepared by sol-gel synthesis and field assisted sintering. The piezoelectric behaviour is observed in calcium titanate, which is also a non-cytotoxic compound. This behaviour is referred to as pseudo-piezoelectricity since it is generated by the distorted structure which is formed during densification by field assisted sintering. Additionally, piezoelectric barium titanate-45S5 bioactive glass composites are combined with titanium alloy Ti6Al4V for the potential implantation of piezoelectric-bioactive scaffolds in load-bearing areas. For the engineering of these bulk scaffolds, electron beam melting is utilized for manufacturing metallic load-bearing lattice structures and combined with piezoelectric-bioactive composites for the joint processing via field assisted sintering.