Friday, September 20, 2019

Prosthetics :: essays research papers

Introduction Prosthetics is the branch of surgery dealing with mechanical devices used to reproduce the form and function of missing body parts. Prosthetics is the replacement of faulty or amputated body parts with artificial body parts. Artificial limbs have been in use since at least 300 BC. In AD 1509 German knight, GÃ ¶tz von Berlichingen, called GÃ ¶tz of the Iron Hand, wore an artificial hand with jointed fingers. Early in the 19th century a German prosthesist built a hand with fingers that could be flexed or extended and that could hold light objects, such as a pen or a hat. Before World War I (1914-1918), wood was considered the best substance for making artificial legs, but later an aluminum alloy called Duraluminum, and more recently fiber materials, have made artificial limbs both lightweight and strong. In recent years, the manufacture of prosthetic devices has developed into a science. Artificial limbs with functioning joints can simulate natural motion. Hip joint prostheses can pr ovide virtually normal mobility for people with damaged hip joints. History Artificial limbs, in one form or other, have been in use from ancient times. In 1885, a specimen was discovered in a tomb at Capua, Italy, along with other relics dating from 300BC. The celebrated artificial hand built in 1509 for the German knight Gotz von Berlichingen, who was called Gotz of the Iron Hand, weighed about 1.4 kg (3 lb.) and had articulated fingers so constructed as to be able to grasp a sword or lance. The hand is in the NÃ ¼rnberg Museum and is still in working order. Early in the 19th century a German prosthesist built a hand with fingers that could be flexed or extended without assistance and yet could still close to hold light objects, such as a pen, a handkerchief, or a hat. In 1851, a French prosthesist invented an artificial arm fitted with a wooden hand and attached to a leather socket that fitted the stump firmly. The fingers were half-closed, the thumb pivoted on a pin and could press firmly against the fingertips by a concealed, strong rubber band; the gr asp of the thumb could be operated by a mechanism attached to the opposite shoulder. The same inventor devised a leg that reproduced a natural gait and lengthened the stride. Technology Before World War I, wood was universally considered the best substance for making artificial legs. Prosthetic devices made of leather reinforced with metal bands tended to lose their shape and were therefore unsatisfactory.

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