PMC

Radiographic findings of rod fracture. a Right T10 rod fracture near domino connector (rod fracture #6) diagnosed 58 months postop with associated T7-8 pseudarthrosis. This fracture occurred at location of prior cross-link. This patient had two subsequent PSO operations after the original PSO operation. The rod fracture occurred in a rod from the first PSO operation. Dominos were added during a subsequent PSO operation to connect to original instrumentation. b Bilateral L5-S1 rod fractures (rod fractures #1 and #2) diagnosed at 12 and 20 months post-operation with associated L5-S1 pseudarthrosis. These rods fractured at the apex of the rod bend with an 81° sagittal rod contour. Pseudarthrosis at L5-S1 was diagnosed during the second rod fracture at 20 months post-operation

(A) Prior to implantation, the surgeon traced the rod shapes on paper. The angle between the proximal and distal tangential line was measured (θ1). (B) Postoperative implant rod geometry (θ2) was obtained after the surgical operation using computed tomography.

The operation steps of traditional method for positioning lower limb mechanical alignment　a. Placement of the metal rod on the surface of the body; b. X-ray fluoroscopy, showing the metal rod was at the center of the femoral head; c. X-ray fluoroscopy, showing that the metal rod was at the 62.5% of the tibial plateau; d. X-ray fluoroscopy, showing that the metal rod was at the center of ankle joint; e. The rod with a bracke
传统组下肢机械力线定位操作步骤　a. 将金属力线杆置于身体表面进行 X 线透视；b. X 线透视显示金属力线杆通过股骨头中心；c. X 线透视显示截骨后金属力线杆同时通过胫骨平台宽度的 62.5% 处；d. X 线透视显示金属力线杆同时通过踝关节中心；e. 配套所使用的带支架的金属力线杆

a, b A 6-year-old girl. Preoperative anteroposterior and lateral radiographs. c, d The X-ray image at 1 week of post-operation. e, f Seven months after the operation. g, h Sixteen months after the operation with telescopic rod displacement