Multi-layered composite bionic self-retaining prosthesis for femoral shaft

A multi-layered composite bionic self-retaining prosthesis for a femoral shaft, comprising:

• a scaffold, an upper bone plate, and a lower bone plate,
• wherein:
• an upper outer side of the scaffold is fixed to a low inner side of the upper bone plate, and a lower outer side of the scaffold is fixed to an upper inner side of the lower bone plate;
• the scaffold comprises an upper trabeculae layer, a middle cortical bone layer, and a lower trabeculae layer;
• the middle cortical bone layer is of a multi-layered composite structure which comprises an outer frame layer, a middle filling layer, and an inner frame layer;
• the upper bone plate comprises a first inner trabeculae layer and a first outer reinforcement layer, and the lower bone plate comprises a second inner trabeculae layer and a second outer reinforcement layer;
• the scaffold is cylindrical;
• the upper bone plate and the lower bone plate are arc-shaped;
• a cell structure of the middle filling layer is of a body-centered cubic structure, with a porosity from 60% to 70%;
• and
• a cell structure of each of the outer frame layer and the inner frame layer is of a glass sponge-mimicking bidiagonal structure, with a porosity from 70% to 90%.