5/2/2023 0 Comments Envisiontec print shrinkage![]() ![]() Furthermore, the elastic admissible strain (EAS) and specific energy absorption (SEA) of the hpHA scaffolds can be increased up to 4.4% and 1.22 kJ/kg, respectively, indicating greatly enhanced mechanical performances owing to the hierarchical porous structure. The scaffolds are mechanically compatible with the natural cancellous bone, with compressive strength in the range of 1.41–7.84 MPa and Young’s modulus of 57.3–304 MPa. Via formulation of the emulsion inks, such as varying the oil volume and adding Pluronic® F-127, this process demonstrates effective control of the microporosity and pore morphology of the scaffolds. The scaffolds exhibit high porosity up to 73.7%, featuring 3D printed macropores of 300 – 400 μm and emulsion templated microporosity of <20 μm. With this in mind, this study reports the fabrication of hierarchical porous hydroxyapatite (hpHA) scaffolds by 3D printing of emulsion inks. Inspired by the hierarchical porous materials in Nature, hierarchical porous BTE scaffolds can achieve a combination of superior mechanical efficiency and biological functions. Nonetheless, existing fabrication strategies have found it difficult to prepare highly porous BTE scaffolds for improved biological properties while also preserving sufficient mechanical properties that are compatible with the natural bone. Mechanical and biological properties constitute the most fundamental requirements for bone tissue engineering (BTE) scaffolds. ![]()
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