3d printers or are they life savers

Man cut's off his fingers and he makes a prostatic hand with a 3d printer. This man was a carpenter and was working on a house in Illinois when he was cutting the rug and his hand got caught in the saw when he stood up he realized that all of his fingers were gone.Who knew that you could make something so useful with a 3d printer, apparently you can make a arm with a 3d printer and hopefully in the near future you could make more like a car or like a computer with a 3d printer. The man was finally able to make it so a id could shake his own fathers hand and if thats not amazing then i dint know what is. This invention is also really cool because it has help so many people in so many ways.