Composite artificial semi-knee joint system

Z. Li, S.-f. Xu, D.-c. Li, Z. Sun, T. Zhang, J.-x. Lu, Z. Wang

Department of Orthopaedics, No. 161 Hospital of PLA, Wuhan, China. lizhi301@163.com

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• Orthopedics

OBJECTIVES: The purpose of the study was to investigate the clinical implantation protocol of custom-made artificial semi-knee joint based on computer-aided design so as to improve the limb salvage efficiency.

MATERIALS AND METHODS: The custom-made artificial semi-knee joint was designed and manufactured based on rapid prototyping technology. The repeated modifications were carried out in the design and manufacture of the semi-knee joint, together with the operation protocol. Clinical trial was conducted on 2 cases of osteosarcoma, one receiving allograft prosthesis composite transplantation, and the other receiving synthetic bone graft prosthesis composite transplantation. The clinical outcomes of the 2 patients were evaluated.

RESULTS: The custom-made artificial semi-knee joint met the clinical customization needs. In clinical trial, 18-month follow-up demonstrated the satisfactory knee joint function recovery in near future.

CONCLUSIONS: The custom-made artificial semi-knee joint based on computer-aided design can afford satisfactory knee joint function recovery following allograft bone transplantation.

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