“…36 Extrusion has already been applied to the manufacturing of wollastonite-based threedimensional scaffolds. More precisely, we succeeded in forming reticulated structures by the deposition of multiple filaments, coming from manual extrusion of a mixture of MK, H62C and MTES (methyltriethoxysilane; first proposed by Cromme et al [92]) and n-CaCO 3 (together with hydroxyapatite micropowders), as shown in Fig. 7b, 36 or by stacking of filaments from hot extrusion (i.e.…”