Description

      Li Tingxin, 26, is a Chinese female. In 11 years she got admitted in the hospital for several times because of “repeated left femoral fracture with deformity and limited activity”. The patient was diagnosed as osteogenesisimperfecta and multiple skeletal malformations. In 2004, her right femur fractured caused by falling injury, which was treated by open reduction and internal fixation with steel plate. In 2014, the right femur again fractured due to falling injury. External fixation frame and Kirschner wire fixation were performed again. After One year, the external fixation frame was taken out and Kirschner wire has been retained. In 2000, she had left hip pain without any deformity, which improved after rest. In 2008 she again felt the pain, but no ovious cause detected. After X-ray examination in hospital, she was diagnosed as left femur fracture. After traction treatment, the fracture healed, and then left femur deformity gradually appeared, making it difficult to stand.

      We printed her left femur in 3D, simulated osteotomy with computer, and made osteotomy guide plate. During the operation, we cut the bone according to the position of the guide plate, and then used Ortho-Bridge System (OBS) invented by ourselves to fix the fracture [1], so as to ensure the almost correct shape of the femur. After the operation, the effect was good, and the patient could stand on his own.

Figures

Figure 1: Bilateral femur deformity on CT, especially in the left side.

Figure 2: 3D printing simulation operation of femur.

Figure 3: Full length films of both legs after operation.

References

1. Wang, DX, Xiong Y, Deng H, Jia F, Gu S et al. Biomechanical analysis and clinical effects of bridge combined fixation system for femoral fractures.[J]. Proc Inst Mech Eng H. 2014; 228: 899-907.