The artificial bone, porous and coated with a thin layer of calcium phosphate, is implanted into the arm in place of the damaged bone.

ECONOMIST: MONITOR

For regeneration to continue, stem cells from both the bone marrow and the heart itself must be coaxed to grow a second layer of tissue that is necessary for the formation of arteries, which are bigger and thicker than capillaries.

WSJ: Nanotechnology Holds Promise for Heart Patients