Fig. 4

Preoperative anterior–posterior X-ray highlighting a bilateral DDH (right hip as Crowe IV and left hip as Crowe III) in a 49-year-old female patient (a). Postoperative X-ray showing an asymmetrical reconstruction of the Crowe III hip with high hip center and the Crowe IV hip at the anatomical position (b). SSTO was performed in the Crowe IV hip, and the osteotomy length was 3.5 cm. At final follow-up, radiographic evaluation after 3.5 years showing no loosening (c). Full-length standing anteroposterior radiograph showing that both lower limbs were of equal length (d)