Hypoesthesia·- reduced tactile sensation 
Astereognosis - unable to recognised tactile sensation
Both - you're fucked, crawling on the ground...

Indeed, bionics is pretty complex for the time. So, unless your character is obsessed about regaining a leg, has tolerance to noise, and has money coming out their behinds in sacks...you're getting a hoof looking thing, or a mannequin leg.