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Anti-loosening bone fixing implant and design method thereof

An implant and anti-loosening technology, which is applied in the direction of bone implants, joint implants, joint implants, etc., can solve problems that cannot meet the treatment needs of patients, prevent micro-movement, simplify the development process, and improve stability Effects on Sex and Lifespan

Inactive Publication Date: 2021-09-03
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] With the in-depth development of research and treatment methods, traditional standardized implants can no longer meet the treatment needs of patients

Method used

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  • Anti-loosening bone fixing implant and design method thereof
  • Anti-loosening bone fixing implant and design method thereof
  • Anti-loosening bone fixing implant and design method thereof

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Experimental program
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Effect test

preparation example Construction

[0069] The preparation steps of the bone fixation implant include:

[0070] 1) According to the CT tomography results and the big data analysis of the bone parameters of the target patient population, obtain the bone defect and necrosis of the patient, obtain the size and shape characteristics of the affected area, and match the bone parameters of the target patient population to obtain the preliminary design standards and data.

[0071] 2) preliminary modeling of the bone implant required by the patient is carried out according to the CT tomography result, and the positive and negative Poisson's ratio structure distribution situation of the implant is designed according to the model's stress analysis result in the simulation software;

[0072] 3) According to the static analysis results of the patient, the stress-strain cloud map is obtained. Based on the big data analysis results of the bone parameters of the target patient population, the spatial topology optimization design...

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Abstract

The invention discloses an anti-loosening bone fixing implant and a design method thereof, and relates to the field of orthopedic medical instruments. The anti-loosening bone fixing implant comprises a bone fixing implant body. The bone fixing implant body is of a porous gradient structure formed by arranging negative Poisson's ratio unit cells and positive Poisson's ratio unit cells in a spatial dispersion mode, according to the stress condition, the negative Poisson's ratio unit cells are arranged on the side, subjected to tension, of the implant body, and the positive Poisson's ratio unit cells are arranged on the side, subjected to pressure, of the implant body. The negative Poisson's ratio unit cells and the positive Poisson's ratio unit cells are all of a three-dimensional porous structure, and the porous gradient structure is formed by arranging the negative Poisson's ratio unit cells and the positive Poisson's ratio unit cells in the axial direction and the radial direction, so that the elasticity modulus of the bone implant body is in gradient distribution. According to the anti-loosening bone fixing implant and the design method thereof, the effects of preventing loosening and falling off and improving fatigue strength can be achieved, bone ingrowth and osseointegration are facilitated, the stability of the implant is improved, and the service life of the implant is prolonged.

Description

technical field [0001] The invention belongs to the field of orthopedic medical instruments, and particularly relates to an anti-loose bone fixation implant and a design method thereof. Background technique [0002] With the popularity of artificial implants, many implants have longevity problems and need to be refurbished every year. According to statistics, as many as 2 million patients need joint replacement surgery, and 10-15% of patients need to undergo a second revision surgery for implants within ten years. The reason is that the problem of aseptic loosening caused by the fretting friction of the implant accounts for most of the cases of implants that need to be refurbished. In addition, the elastic modulus of the implant is much higher than the elastic modulus of human bone, resulting in stress shielding phenomenon and osteolysis. The fracture of the implant caused by fatigue fracture and fatigue fracture also leads to the problem of the second refurbishment of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/28A61F2/30
CPCA61F2/28A61F2/30A61F2/30771A61F2/30942A61F2002/3006A61F2002/30075A61F2002/30077A61F2002/30317A61F2002/30784A61F2002/3093A61F2002/30934A61F2002/30948A61F2002/30985A61F2002/30943
Inventor 高琳同治强田泽水梁智美申泽宇刘尚飞吕佳侨李涤尘
Owner XI AN JIAOTONG UNIV
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