A bionic gradient knee femoral prosthesis structure and its manufacturing method

Abstract

The invention discloses a bionic gradient knee joint femoral prosthesis structure and a manufacturing method thereof. The prosthesis structure includes a smooth curved shell based on the shape of the original distal end of the femur, a fully covered fitting surface after osteotomy, a gradient porous structure, and a fixed After the osteotomy, the fully covered fitting surface is stretched back to the original distal femoral surface, and the gradient porous structure is used to replace the entity that is more than 5mm thick from the curved surface. The fixation device is generated on the inner distal plane of the femoral prosthesis. Compared with the traditional standardized prosthesis, the present invention has a high degree of fit, a high degree of conformity between the prosthesis and the native knee joint bone, and is more suitable for the patient's movement. The bionic gradient knee femoral prosthesis of the present invention is easy to manufacture, and the traditional manufacturing method of the prosthesis with the bionic gradient structure is very difficult. The 3D printing manufacturing method adopted in the present invention can realize the custom prosthesis according to the individual differences of patients, and the production cycle is short and convenient. The low cost provides the possibility for the application and development of individual adaptive therapy.

Description

technical field [0001] The invention relates to the field of biomedical manufacturing, in particular to a bionic gradient knee femoral prosthesis structure and a manufacturing method thereof. Background technique [0002] Total knee arthroplasty is a common surgical method for the clinical treatment of advanced knee arthrosis. In addition to the surgical technique, the design of the replacement prosthesis plays a crucial role in the surgical effect. The mechanical and biological properties of artificial joints are the key factors affecting its clinical application effect, so the implanted prosthesis should have good biocompatibility, strength and toughness. At present, the knee-femoral prosthesis is made of metal materials, including stainless steel, cobalt-chromium alloy, titanium and its alloys. The prosthesis made of these metal materials has good mechanical properties, but there are obvious differences from the bones in the human body. Bone is a perfect "smart" materia...

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Problems solved by technology

[0003] At present, there are sintering method, casting method, etc. for the preparation of gradient porous structure prosthesis. These processes are either difficult to achieve gradient porosity change, or the preparation process is complicated, the cycle is long, and the preparation cost is high.

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