Artificial organ almost always preceded by extensive experiments with animals. Initial testing in humans is frequently limited to those either already facing death or who have exhausted every other treatment possibility. Artificial arms and legs, or prosthetics, are intended to restore a degree of normal function to amputees. Mechanical devices that allow amputees to walk again or continue to use two hands have probably been in use since ancient times, the most notable one being the simple peg leg. Since then, the development of artificial limbs has progressed rapidly. New plastics and other materials, such as carbon fiber have allowed artificial limbs
Occupational medicine Occupational medicine Occupational medicine, until 1960 called industrial medicine, is the branch of medicine which is concerned with the maintenance of health in the workplace, including prevention and treatment of diseases and injuries, with secondary objectives of maintaining and increasing productivity and social adjustment in the workplace. It is, thus, the branch of clinical medicine active in the field of occupational health and safety. OM specialists work to ensure that the highest standards of occupational health and safety are achieved and maintained in the workplace. While OM may involve a wide number of disciplines, it centers on preventive medicine and