Scientists at the University of Minnesota have used a 3D printer to build "scaffolds" to link nerves damaged by disease or accidents. Previously, the only thing that could be done was complicated and often painful surgery to try to reconnect damaged nerves. Now, the scaffolds are placed in the body and provide a direct route for the damaged nerves to grow, heal and reconnect on their own without the painful surgery. Scientists are optimistic that this technique may provide hope for neurological diseases as well.