Washington State University researchers have used a 3D printer to create a bone-like material and structure that can be used in orthopaedic procedures, dental work and even to deliver medicine for treating osteoporosis.
http://ummid.com/news/2011/December/01.12.2011/bone_like_material_created.htm
http://ummid.com/news/2011/December/01.12.2011/bone_like_material_created.htm