Compressive strength 8 Finite element method 6 Optical properties 6 Tensile strength 6 Biocompatibility 5 Fabrication 5 Hydrogels 5 Morphology 5 Reinforcement 5 human 5 3D printing 4 Copper oxides 4 Economic analysis 4 Infrared devices 4 Learning algorithms 4 MEMS 4 Machine learning 4 Nanocomposites 4 Performance 4 Scanning electron microscopy 4 Simple++ 4 article 4 chemistry 4 microstructure 4 Additives 3 Anisotropy 3 Bending strength 3 Biomimetics 3 Calcium 3 Cell culture 3