Synthetic bones promote natural bone regeneration after being implanted into animals.
Fig.1 | Close-up photograph of a small region of the first several layers of a 3-D printed hyper-elastic bone sheet. Each fiber is approximately 200 micrometers in diameter. (Credit: Adam E. Jakus, Northwestern University, Evanston).
Fig.2 | A cross-section of a 3-D printed adult human femur (Credit: Adam E. Jakus, Northwestern University, Evanston).