Designing method and manufacturing method of knee joint femoral prosthesis used for total knee arthroplasty

A femoral prosthesis and total knee replacement technology, applied in the field of total knee replacement, can solve the problems of prosthesis wear, shortened service life, incomplete coverage of the prosthesis, etc., and achieve the effect of improving matching and short processing cycle

Active Publication Date: 2014-02-19
BEIJING NATON TECH GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

The mismatch between the prosthesis and the shape of the knee joint will cause incomplete coverage or suspension of the prosthesis, which will lead to wear and tear of the prosthesis, shortened service life, and clinical symptoms such as knee joint pain and swelling after joint replacement, and even the possibility of prosthesis revision

Method used

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  • Designing method and manufacturing method of knee joint femoral prosthesis used for total knee arthroplasty
  • Designing method and manufacturing method of knee joint femoral prosthesis used for total knee arthroplasty
  • Designing method and manufacturing method of knee joint femoral prosthesis used for total knee arthroplasty

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Embodiment

[0035] refer to figure 1 Shown, present embodiment is used for the design method of the knee joint femoral prosthesis of total knee arthroplasty, comprises the following steps:

[0036] 1. Based on the CT tomographic scan data of normal Chinese medical images in DICOM format, using the medical imaging software Mimics10.01, according to the characteristics of different gray levels of soft tissues and bones in the image, the image is segmented and repaired, and then three-dimensional reconstruction is carried out. structure, establish a digital model of the femoral bone of the knee joint, and output it as a PLY format file;

[0037] 2. Import the PLY file of the femoral bone model into the Geomagic Studio software, first establish the mechanical axis of the femur, and then find the surgical epicondyle line of the femur on the vertical plane of the mechanical axis, take the mechanical axis of the bone as the Z axis, and the surgical epicondyle line as X axis, establish a three-d...

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Abstract

The invention discloses a designing method and a manufacturing method of a knee joint femoral prosthesis used for total knee arthroplasty. The designing method includes the following steps: S11, on the basis of CT (computed tomography) data of a normal Chinese person and in a medical image DICOM format, applying medical image software Mimics to build a three-dimensional digital model of a femur, and outputting a PLY-format file; S12, leading the digitalized femoral model PLY file in Geomagic Studio software, establishing a three-dimensional coordinate system, and utilizing a measuring tool to collect geometric parameters related to prosthesis designing; S13, performing statistical analysis on collected data by utilizing statistical software, and utilizing three-dimensional drawing software to draw a solid entity of the knee joint femoral prosthesis. The designing method and the manufacturing method have the advantages that a series of femoral prostheses different in type exist for men and women respectively, different knee joint femoral skeleton anatomical morphological features of men and women in China can be met, and matching degree of prostheses and knee joints is increased.

Description

technical field [0001] The invention relates to the technical field of total knee replacement, in particular to a design method and a manufacturing method of a knee-femoral prosthesis used in total knee replacement. Background technique [0002] Osteoarthritis (OA) is a chronic joint disease characterized by the degeneration and destruction of articular cartilage and bone hyperplasia. It has become one of the most common causes of chronic disability in middle-aged and elderly people, and the knee joint is Common site of bone and joint degeneration. Total knee arthroplasty is a very mature and widely used orthopedic surgery, and has become an effective means of treating advanced osteoarthritis. [0003] In addition, 3D printing technology has become one of the major technological advances in the manufacturing industry in recent years, and has successfully opened up research areas in medical applications. The rapidity, accuracy and rapid manufacture of complex-shaped workpie...

Claims

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Application Information

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