Age 44,Male,Ht.173cm,slim, In 1984,fallen from cycle?hairline fracture of Lt.femur head.rest for 45 days.after 1 yr pain at Lt hip Jt. Drs misjudged .In1988 diagnosis was Avascular necrosis of Lt hip.now no pain,but Xray show necrosis of head,half head reduced,treatment? please.literature,on line site