From your link...this is fantastic 3D printed body parts
Ears and human tissue
Replacing body parts has gone a step further with 3D bioprinting. Regenerative medicine scientists at Wake Forest Institute for Regenerative Medicine (WFIRM) have created a 3D bioprinter (Integrated Tissue and Organ Printing System) that can produce replacement tissue strong enough to endure transplantation. They have used it to print ear, bone and muscle structures.
The system uses bio-degradable, plastic-like materials to form the tissue shape and water-based gels that contain the cells. A strong, temporary outer structure is formed is also formed. The printing process does not harm the cells.
The system “can fabricate stable, human-scale tissue of any shape. With further development, this technology could potentially be used to print living tissue and organ structures for surgical implantation,” said Anthony Atala, M.D., director of WFIRM and senior author on the study.