(A) H&E staining of the HAp scaffold (Hs), β-TCP scaffold (Ts), β-TCP/CaSiO3 scaffold (Os) and scaffold with a micro/nano-HAp surface layer (NMs). Scale bar 200 μm. (B) Masson staining of the HAp scaffold (Hs), β-TCP scaffold (Ts), β-TCP/CaSiO3 scaffold (Os) and scaffold with a micro/nano-HAp surface layer (NMs). Scale bar 200 μm (M: materials, CB: cortical bone, NB: new bone matrix, black arrows indicate osteogenesis).