D-Rev engineers headed by Krista Donaldson have done the ReMotion Knee, an affordable prosthetic knee for above-knee amputees. The team’s goal was to give a chance to lead a better life for people who are an amputee and are living on less than four dollars a day. A high-end prosthetic knee costs about 20000 dollars, it has a microprocessor inside and can pretty much do anything. A low-end titanium knee is a four-bar mechanism that mimics a natural human knee, but it costs about 1500 dollars.
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