Abstract
Bioprinting has become an attractive tool to generate three-dimensional (3D) in vitro tissues on demand. It allows the exact positioning of cells, biomaterials, and molecules in 3D space to create organ-like structures suitable for drug development, disease modeling, and regenerative medicine. In this chapter, the different bioprinting platforms are discussed. Mainly, we focus on bioinks, the bioresorbable polymers used for bioprinting purposes. So far, most of the bioinks are not developed for printing applications and thus exhibit only superior cytocompatibility. A prospective bioink should also provide optimal printing properties. We discuss features of printable polymers concerning polymerization modes, biocompatibility, printability, and polymer characterization. Furthermore, promising tissue printing results are presented. Bioprinting technology is still in its infancy and faces major hurdles, but once novel well-characterized bioinks with superior printing properties are available, the technology will have a huge impact in regenerative medicine.
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