Figure 5.

Reconstruction of a type IV pelvic defect. A, preoperative CT; B, diagram of the iliac bone flange, with the yellow arrows showing the custom iliac bone flanges design; C, back view of the prosthesis, with the red area showing the porous surface area, the yellow arrows showing the custom iliac bone flanges design, and the red arrow showing the custom iliac augment; D, side view of the prosthesis, with the red arrow showing the custom iliac augment; E, 3D design of the prosthesis before operation, with the yellow arrows showing the custom ilium flanges design, which can avoid the defect area and ensure the best use of the remaining ilium; F, postoperative CT.