Bent-knee prosthesis.
D000368:Aged; D000671:Amputation, Surgical / Q000009:adverse effects; D000672:Amputation Stumps; D001186:Artificial Limbs; D003286:Contracture / Q000628:therapy; D049669:History, 16th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D007719:Knee Joint; D007866:Leg / Q000601:surgery*; D008297:Male; D019736:Prostheses and Implants / Q000266:history