Host bone stress environment based custom prosthesis optimization design method

An optimized design and prosthesis technology, applied in design optimization/simulation, calculation, special data processing applications, etc., can solve the problems of limited stress distribution change, limited stress shielding relief, and complex stress conditions, etc., to achieve optimal prosthesis Internal porous structure, life-span improvement, inward growth promotion effect

Active Publication Date: 2016-07-06
深圳协同创新高科技发展有限公司
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Problems solved by technology

However, after the prosthesis is implanted in the human body, the surrounding mechanical environment changes greatly, and the stress on the prosthesis and the surrounding bone is complex. Changing the dis

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  • Host bone stress environment based custom prosthesis optimization design method
  • Host bone stress environment based custom prosthesis optimization design method
  • Host bone stress environment based custom prosthesis optimization design method

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Embodiment Construction

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, but the embodiments of the present invention are not limited thereto.

[0041] refer to figure 1 , taking the femoral stem prosthesis of the artificial hip joint as an example, the implementation method is as follows:

[0042] Step 1: Collect the CT data of the patient's hip joint, and establish a three-dimensional model of the patient's surrounding bone, that is, the three-dimensional model of the femur, through Mimics (Version16.0, Materialize, Belgium) software, and then perform osteotomy according to the surgical requirements and according to the shape of the three-dimensional femoral model The three-dimensional model of the femoral stem of the artificial hip joint was obtained by designing the shape of the prosthesis, and...

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PUM

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Abstract

The invention, for reducing a stress shielding effect after prosthesis implantation, proposes a host bone stress environment based custom prosthesis optimization design method. Three criteria, namely, the strength, the surrounding bone stress and the interface micro-motion between a prosthesis and a bone, in prosthesis elastic modulus optimization calculation are proposed, and the mechanical property of the host bone and a personalized kinematic input are considered in optimization; the prosthesis elastic modulus distribution is optimized through finite element software to achieve the purpose of optimizing a porous structure in the prosthesis; and for the designed prosthesis, on the premise of meeting the strength requirement, the stress shielding effect after implantation is reduced and the service life of the prosthesis after implantation is prolonged.

Description

technical field [0001] The invention belongs to the technical field of biomedical device prosthesis optimization design, in particular to a customized prosthesis optimization design method based on host bone stress environment. Background technique [0002] Loosening is the most important factor affecting the service life of prostheses implanted in the human body (Yousef Abu-Amer, Isra Darwech, John C Clohisy. Aseptic loosening of total joint replacements: mechanisms underlying osteolysis and potential therapies [J]. Arthritis Research and Therapy, 2007, 9(1): S6). The mechanical factor causing loosening is that after the prosthesis is implanted, it will change the mechanical environment of the surrounding bone of the host. Various medical alloys, including medical stainless steel, titanium alloy, and cobalt-chromium-molybdenum alloy are the most commonly used materials for prostheses, and their elastic modulus is generally 100-250GPa, which is far greater than the elastic m...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王玲孙畅宁康建峰李涤尘靳忠民
Owner 深圳协同创新高科技发展有限公司
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