When you think of future bone replacement methods, you probably either imagine cultivated, lab-grown tissue or some manner of steel and plastic implants. You probably don't think of wood -- at least not inside you. Too many weird "George Washington had carved chompers" connotations to think about. Yet Discovery News is reporting a new procedure may make it possible to turn a block of wood into artificial bone. It's not simply a matter of whittling a femur out of red oak, though.