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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Porous tantalum rod implantation is associated with low survival rates in patients with type C2 osteonecrosis of the femoral head but has no effect on the clinical outcome of conversion total hip arthroplasty: a retrospective study with an average 8-year follow-up

Fig. 2

a, b Anteroposterior and frog lateral X-rays of bilateral hips showed that left hip was in ARCO stage II and JIC type C2. c, d, e, f preoperative MRI images showed left hip was involved serious ONFH, the lateral column was involved (sign of C2). g radiographs followed by PTRS of left hip was shown. h, i subchondral bone collapsing was observed with serious clinical symptom at 2 years postoperatively. j THA was performed

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