Figure 3.

Characterizations of biomimetic silicate‐based bioceramic (Akermanite, (AKT), Ca₂MgSi₂O₇) scaffolds with lotus root‐like microstructure. a) Optical microscope and b) SEM images show the lotus root‐like biomimetic structure. The materials are packed by struts (Ø1.5 mm) with different numbers of channels (Ø400–600 µm). c) SEM image for cross‐section showing that the hollow channels are completely open. d) SEM image for the inner surface microstructure of the channels. e) XRD analysis demonstrating the pure crystal phase of silicate‐based bioceramic scaffolds. f) Packing patterns (i.e., cross packing pattern, quartet close packing pattern, and hexagonal close packing pattern) have significant influence on the g) porosity and h) compressive strength of the lotus root‐like biomimetic materials. Porosity and mechanical property can be well controlled by predesign of packing pattern and number of channels. (n = 5, **P < 0.01, ***P < 0.001.)