Developmental dysplasia of the hip: What has changed in the last 20 years?

Figure 4 Acetabuloplasty. A female patient was diagnosed with DDH of the left hip at the age of 6 mo using sonography. She was treated with a spica cast. AVN of the left femoral head was seen on follow-up radiographs at the age of 3 years (A,B); C, D: Acetabuloplasty of the left hip with femoral derotational osteotomy was performed at the age of 5 years; E, F: Follow-up X-rays at the age of 8 years. DDH: Developmental dysplasia of the hip; AVN: Avascular necrosis.