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Individualized reversal design and manufacturing method for full knee joint replacing prosthesis

A technology of total knee replacement and reverse design, applied in the direction of knee joints, prostheses, elbow joints, etc., can solve the problems of inability to realize individualized design and customized manufacturing of knee joint prostheses, and achieve a high degree of individual fit , short processing cycle and optimized effect

Active Publication Date: 2014-06-18
BEIJING NATON TECH GRP CO LTD +1
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the existing knee prosthesis processing technology generally adopts mold casting, numerical control finishing and other methods, which cannot realize the personalized design and customized manufacturing of knee prosthesis

Method used

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  • Individualized reversal design and manufacturing method for full knee joint replacing prosthesis
  • Individualized reversal design and manufacturing method for full knee joint replacing prosthesis
  • Individualized reversal design and manufacturing method for full knee joint replacing prosthesis

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] like figure 1 As shown, the personalized reverse design and manufacturing method of the total knee replacement prosthesis provided by the present invention comprises the following steps:

[0035] 1. Establish a three-dimensional digital model of the femur and tibia based on the medical imaging data of the patient's knee joint:

[0036] 1) Based on the CT / MRI tomographic scan image of the patient's knee femur in DICOM format, using the medical imaging software Mimics, the image is segmented and repaired according to the characteristics of different gray levels of soft tissue and bone in the image, and then 3D reconstruction is performed To obtain a three-dimensional digital model of the femur (such as figure 2 shown), and output as a PLY format file.

[0037]2) Based on the CT / MRI tomographic scan image of the patient's tibia in DICOM format...

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Abstract

The invention relates to an individualized reversal design and manufacturing method for a full knee joint replacing prosthesis. The method comprises the following steps that 1, three-dimensional digital models of the thighbone and the tibia are built on the basis of the medical image data of the knee joint of a patient; 2, virtual bone cutting software is used for respectively carrying out simulated bone cutting on the three-dimensional digital models of the thighbone and the tibia; 3, the reversal design of CAD (computer-aided design) models of a thighbone replacing prosthesis, a tibia replacing prosthesis and a tibia gasket prosthesis is carried out; 4, the full knee joint replacing prosthesis is manufactured according to the CAD models of each prosthesis through the 3D (three-dimensional) printing technology. The method provided by the invention has the advantages that on the basis of the original bone structure of the patient, the virtual knee joint replacing operation bone cutting form is combined, the structural form of the replacing prosthesis is subjected to reversal design, the structural form consistency of the cut bone and the replacing implanted body structure is realized to the greatest degree, and the optimum matching between the prosthesis and the individual bone form is reached. In addition, the laser selective melting 3D printing technology is used for manufacturing the designed replacing prosthesis, the optimum matching between the prosthesis and the knee joint bone cutting surface is ensured on the basis of the minimum bone cutting quantity, and the effect optimization is reached.

Description

technical field [0001] The invention relates to a design and manufacturing method of an artificial knee joint prosthesis, in particular to a personalized reverse design and manufacturing method of a total knee joint replacement prosthesis based on native bone morphology. Background technique [0002] At present, osteoarthritis and rheumatoid arthritis are common joint diseases in the elderly, which seriously affect the quality of life of patients, and there is a lack of effective conservative treatment. For patients with advanced osteoarthritis, total knee replacement has been widely used clinically and has become an effective treatment for such diseases, which can reduce the pain of patients and improve the quality of life. [0003] Studies have shown that the anatomical shape of the knee joint of each individual patient is different, and the current knee prosthesis system for total knee replacement is a standardized, modular design of several different types of prostheses,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38G06T19/00
CPCA61F2/30942A61F2/38A61F2002/30001
Inventor 余家阔杨波杨永强宋长辉
Owner BEIJING NATON TECH GRP CO LTD
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