“…The organic part of biomaterial provides biomaterial flexibility and improves its biocompatibility [21][22][23], whereas the inorganic part provides load-bearing strength and stiffness [22]. In organic-inorganic composites, the organic matrix may be composed of natural polymers (e.g., chitosan, collagen, hyaluronic acid, fibrin, silk fibroin, alginate, amylopectin, carrageenan, agar, dextran, xanthan gum, pullulan) [15,[23][24][25][26] and/or synthetic polymers (e.g., polylactic acid (PLA), polycaprolactone (PCL), poly(glycolic acid) (PGA), polyanhydride, polyphosphazene, polyether ether ketone (PEEK), polypropylene fumarate (PPF)) [27], whereas the inorganic part may be made of metal alloys [16] and ceramics, such as hydroxyapatite (HA), calcium phosphate bone cements (CPS), α-tricalcium phosphate (α-TCP), β-tricalcium phosphate (β-TCP), Bioglass (BG), glass-ceramics, as well as carbon nanotubes [15,24,27,28].…”