Fig. 2

X-ray films of a 62-year-old female patient with bilateral congenital hip dysplasia and secondary bilateral osteonecrosis of femoral heads in group B. a. Before operation; b. 3 months after operation; c. 18 months after operation
X-ray films of a 62-year-old female patient with bilateral congenital hip dysplasia and secondary bilateral osteonecrosis of femoral heads in group B. a. Before operation; b. 3 months after operation; c. 18 months after operation