Avascular necrosis of the hip was evaluated in two groups of patients.
On group had sustained the insult to the epiphysis in infancy and had a
mean growth loss in the proximal end of the femur of 21.5 millimeters at a
mean age of 11.7 years. The other group had sustained the insult in
mid-childhood (due to Legg-Perthes disease) and had a mean growth loss of
seven millimeters at 12.4 years. Based on this evaluation, we concluded
that trochanteric epiphyseodesis was nary in the latter group.