Cobalt alloy partition bone trabecula femoral condyle prosthesis and preparation method

A technology of trabecular bone and cobalt alloy, applied in the field of medical implant materials, can solve the problems of powder failure to obtain good fusion, uneven microstructure, and surrounding tissue damage, and achieve long-term stability and excellent resistance. Compressive properties and beneficial effects on bone ingrowth

Pending Publication Date: 2021-02-02
JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many years of clinical application have found that bone cement fixation can bring many safety and effectiveness problems: bone cement monomer polymerization releases heat, causing damage to surrounding tissues; if bone cement particles enter the blood or cause high pressure in the medullary cavity during filling, it will cause pulmonary embolism and fat embolism
However, the solid part of 3D printing products is prone to problems such as uneven microstructure and internal defects, and the mechanical properties are not good; the powder in the structure of the trabecular bone is not well sintered, and the mechanical properties are poor.

Method used

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  • Cobalt alloy partition bone trabecula femoral condyle prosthesis and preparation method
  • Cobalt alloy partition bone trabecula femoral condyle prosthesis and preparation method
  • Cobalt alloy partition bone trabecula femoral condyle prosthesis and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]The preparation method of cobalt alloy partition trabecular bone femoral condyle prosthesis includes the following steps:

[0047]1) Using cobalt alloy powder as a raw material, the first intermediate product of the cobalt alloy partitioned trabecular femoral condyle prosthesis is obtained by 3D printing, and the first intermediate product is put into a hot isostatic pressing furnace and protected by argon. When the temperature is lowered, the temperature is raised to 1140°C, placed at a constant temperature of 170MPa for 3h, and then reduced to normal pressure. The furnace is cooled to below 200°C and taken out to obtain the second intermediate product:

[0048]2) Place the second intermediate product in a programmed cooling box to cool to -80℃ at a rate of 1℃ / min, keep it at a constant temperature for 10 hours, and take it out of the programmed cooling box; place it in liquid nitrogen for another 16 hours, and adjust the temperature to At room temperature, the third intermediate p...

Embodiment 2

[0065]The preparation method of cobalt alloy partition trabecular bone femoral condyle prosthesis includes the following steps:

[0066]1) Using cobalt alloy powder as a raw material, the first intermediate product of the cobalt alloy partitioned trabecular femoral condyle prosthesis is obtained by 3D printing, and the first intermediate product is put into a hot isostatic pressing furnace and protected by argon. When the temperature is lowered, the temperature is raised to 1170°C, placed at a constant temperature of 140MPa for 2h, and then reduced to normal pressure. The furnace is cooled to below 200°C and taken out to obtain the second intermediate product:

[0067]2) Place the second intermediate product in a programmed cooling box to cool to -100℃ at a rate of 1℃ / min, keep it at a constant temperature for 7 hours, and then take it out of the programmed cooling box; place it in liquid nitrogen for another 24 hours and adjust the temperature to At room temperature, the third intermedia...

Embodiment 3

[0083]The preparation method of cobalt alloy partition trabecular bone femoral condyle prosthesis includes the following steps:

[0084]1) Using cobalt alloy powder as the raw material, the first intermediate product of the cobalt alloy partitioned trabecular bone femoral condyle prosthesis is obtained by 3D printing integrally, and the first intermediate product is put into the hot isostatic pressing furnace and protected by helium Then, the temperature is raised to 1200°C, placed at a constant temperature of 110MPa for 1 hour, and then reduced to normal pressure, and the furnace is cooled to below 200°C and taken out to obtain the second intermediate product:

[0085]2) Place the second intermediate product in a programmed cooling box to cool down to -120℃ at a rate of 1℃ / min, and place it at a constant temperature for 5 hours, then take it out of the programmed cooling box; place it in liquid nitrogen for another 36 hours and adjust the temperature to At room temperature, the third int...

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Abstract

The invention discloses a cobalt alloy partition bone trabecula femoral condyle prosthesis and a preparation method. The preparation method comprises the steps that cobalt alloy powder is used as a raw material, an intermediate product of the cobalt alloy partition bone trabecula femoral condyle prosthesis is obtained through 3D printing integral forming, and the cobalt alloy partition bone trabecula femoral condyle prosthesis is obtained through hot isostatic pressing and cryogenic treatment. Bone trabecular is arranged at subareas of a condylus medialis fixing surface and a condylus lateralis fixing surface of the cobalt alloy partition bone trabecula femoral condyle prosthesis. According to the cobalt alloy partition bone trabecula femoral condyle prosthesis, micro-strain of most areasof femoral condyle bone tissue is between minimum effective strain threshold value and hyper-physiological strain threshold value, bone ingrowth is facilitated, and the long-term stability is improved. 3D printing integral forming is adopted, the bonding strength of the bone trabecula and a solid body is high, falling is not likely to happen, and the service life of the prosthesis is prolonged. The bone trabecula part of the cobalt alloy partition bone trabecula femoral condyle prosthesis prepared by the invention has excellent compression resistance. The solid part releases residual stress, and plasticity is enhanced.

Description

Technical field[0001]The invention relates to the technical field of medical implant materials, in particular to a cobalt alloy partitioned trabecular bone femoral condyle prosthesis and a preparation method.Background technique[0002]Total knee arthroplasty is currently a clinically effective treatment for end-stage knee joint diseases. It uses artificially designed joint prostheses to replace the injured knee joint tissue to relieve the patient’s pain, restore the knee joint function, and improve his life quality. Corresponding to the human anatomy, the knee joint prosthesis is composed of femoral condyle, tibial plateau and platform pad. With the rapid development of medical device technology and the continuous improvement of people's requirements for the safety and effectiveness of prosthetic products, the design and manufacturing technology of knee joint prostheses will require continuous optimization and improvement.[0003]At present, the clinically used knee joint prostheses in...

Claims

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Application Information

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IPC IPC(8): A61F2/38B22F5/10B22F10/64B33Y10/00B33Y40/20B33Y70/00C22C19/07
CPCA61F2/3859A61F2002/3006A61F2002/3093A61F2002/30934A61F2002/30985A61F2310/00029B22F3/00B22F3/15B22F3/24B22F5/10B22F2003/248B33Y10/00B33Y70/00B33Y40/20C22C19/07
Inventor 曹雨李建宇黄洁茹张景康刘璐
Owner JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD
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