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Bionic gradient knee femoral prosthesis structure and a production method thereof

A technology for a femoral prosthesis and a manufacturing method, which is applied in the field of bionic gradient knee joint femoral prosthesis structure and its manufacturing, can solve the problems of difficulty in realizing gradient porosity change, complicated preparation process and high preparation cost, and achieves light weight and guaranteed mechanical properties. Performance, low cost effect

Active Publication Date: 2014-02-19
BEIJING NATON TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Bionic gradient knee femoral prosthesis structure and a production method thereof
  • Bionic gradient knee femoral prosthesis structure and a production method thereof
  • Bionic gradient knee femoral prosthesis structure and a production method thereof

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Embodiment

[0036] Such as Figure 4 As shown, the bionic prosthesis of this embodiment 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 fixing device. Stretch to the surface of the original distal femur, and replace the entity with a thickness of more than 5mm from the curved surface with a gradient porous structure. The fixation device is generated on the inner distal plane of the femoral prosthesis. The area to be replaced by the prosthesis is excised and replaced by the upper femoral prosthesis. Therefore the femoral prosthesis is divided into the curved surface feature that cooperates with the tibial prosthesis below, the femoral prosthesis medial surface feature that cooperates with the femoral osteotomy retainer, and the fixation feature in order to fix the femoral prosthesis and the femoral osteotomy retainer. The core of the present invention is to adopt...

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Abstract

The invention discloses a bionic gradient knee femoral prosthesis structure and a production method thereof. The prosthesis structure comprises a smooth curved-surface shell, a post-osteotomy completely-covering joint face, a gradient porous structure and a fixing device. The curved-surface shell is based on the shape of the distal end of a connate femur. The post-osteotomy completely-covering joint face reversely spreads to the distal-end curved surface of the connate femur. A solid more than 5mm distant from the curved surface is replaced by the gradient porous structure, and the fixing device is formed on the distal-end plane on the inner side of a femoral prosthesis. Compared with conventional standard prostheses, the prosthesis structure has the advantages that matching degree is high, and the prosthesis highly fits the bone shape of a connate knee and is adaptable to motions of a patient. The bionic gradient knee femoral prosthesis structure is easy to produce, and conventional production methods for conventional bionic gradient prostheses are complex; by the 3D (three-dimensional)-printing production method, prostheses can be customized according to individual differences of patients, production period is short, cost is low, and a possibility for application and development of individualized therapy is provided.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38
CPCA61F2/38A61F2002/30001B33Y80/00
Inventor 杨永强宋长辉余家阔杨波张曼慧
Owner BEIJING NATON TECH GRP CO LTD
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