Carbon fiber can not self repair if get fractured. Dead bone looks the same like living bone. Bone has everything like normal tissue, but more dynamic. read more
The bones in your body are made from material which has a tensile strength of 150MPa, a strain to failure of 2% and a fracture toughness of 4MPa(m) ½. For a structural material that's not good. We can make alloy steels that are ten times better in all three of those properties. read more