I imagine any inorganic implamt is going to degrade, and have proprietery patents included. Your last question reminded me of the Jarvik Heart, in particular. I

I imagine any inorganic implamt is going to degrade, and have proprietery patents included. Your last question reminded me of the Jarvik Heart, in particular. Interesting read on evolution of the permanent to impermanent artificial heart: http://mobile.nytimes.com/2016/03/21/us/artificial-hearts-ticking-along-decades-after-jarvik-7-debate.html?referer= http://mobile.nytimes.com/2016/03/21/us/artificial-hearts-ti...