3D打印技术在复杂肿瘤膝关节股骨假体周围骨折翻修术中的应用

doi:10.13481/j.1671-587x.20160527

Abstract

Abstract:

Objective: To perform the preoperative design and operative simulation for periprosthetic femoral fractures (PFF) in one patient with complex tumor knee replacement under assistance of three-dimensional(3D) printing technology, and to explore a more accurate and feasible way to restore the normal anatomy and function of this kind of patients. Methods: The female patient aged 32 years old diagnosed with PFF after an complex tumor knee replacement was selected.The CT images of the patient's bilateral legs were collected and reconstructed.The bilateral femurs were virtually sliced and the important parameters at each location of both sides were recorded respectively. Novel femoral stem and nail paths were specially designed on the basis of original prosthesis according to these parameters. Then vitual assemble was made with the residual femur. The prosthetic femoral stem components and navigator were customized based on the 3D simulation results when no more errors were found. The residual femoral resin model, customized components and navigator were printed with an SLA 3D printer. The bone cement was taken out and newly designed femoral stem was implanted successfully according to the steps designed preoperatively. The preconcerted allograft bone plates were applied for patch of the bone defect. The pathological results,X-ray and functional scores were included in the observation indexes. Results: With the help of successfully preoperative computer matching, successfully printed bone model-prosthesis assemble and re-customized navigator, the operation was successfully performed. The postoperative alignment shown in the X-ray image was good. The patient was able to normally walk and squat one month after operation with a crutch. MSTS93 score was improved from 0 before operation to 14 only one month after operation. Conclusion: As for PFF of complex tumor knee joint, preoperative design and simulation with 3D printing technology may provide a more accurately and effectively operative outcome than traditional methods.

Key words: knee tumor, revision surgery, 3D printing, periprosthetic fracture, preoperative design

CLC Number:

R687.4

LI Chen, ZOU Yun, WANG Xiaonan, ZHAO Hongyu, HAN Qing, WANG Jincheng. Application of 3D printing technology in reconstruction of an complex periprosthetic femoral fracture of tumor knee joint[J].Journal of Jilin University Medicine Edition, 2016, 42(05): 980-984.

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Application of 3D printing technology in reconstruction of an complex periprosthetic femoral fracture of tumor knee joint

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