Composite artificial semi-knee joint system

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