Fig. 6

Stage-wise details of a 49-year-old female patient with bilateral Crowe type IV DDH who underwent THA surgery. A Preoperative X-ray exams of bilateral hip joints showed that both femoral heads were deformed and detached from the outside of the true mortar, which was shallow and small; B and C In the first stage, the left THA was performed first. The postoperative X-ray showed that the left acetabular prosthesis was in the true acetabulum, and the greater trochanter bone block was well fixed with steel wire; D Three months after the first surgery, the right limb was significantly shorter than the left, about 7.5 cm