Cobalt alloy partitioned bone trabecula single-compartment femoral condyle prosthesis and preparation method

A technology of trabecular bone and cobalt alloy, which is used in prostheses, metal processing equipment, additive manufacturing, etc., can solve the problems of powder failure to obtain good fusion, uneven microstructure, and poor mechanical properties, and achieve excellent results. Bone ingrowth performance, uniform bone ingrowth performance, and the effect of reducing stress shielding effect

Pending Publication Date: 2021-01-05
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, 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 partitioned bone trabecula single-compartment femoral condyle prosthesis and preparation method
  • Cobalt alloy partitioned bone trabecula single-compartment femoral condyle prosthesis and preparation method
  • Cobalt alloy partitioned bone trabecula single-compartment femoral condyle prosthesis and preparation method

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Experimental program
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Effect test

Embodiment 1

[0038] The preparation method of cobalt alloy partitioned trabecular single-compartment femoral condyle prosthesis comprises the following steps:

[0039] 1) Using cobalt alloy powder as the raw material, the first intermediate product of the cobalt alloy partitioned trabecular unicompartmental femoral condyle prosthesis was obtained by 3D printing, and the first intermediate product was put into a hot isostatic pressing furnace and heated in argon Under gas protection, raise the temperature to 1140°C, place it at a constant temperature of 170MPa for 3 hours, drop to normal pressure, cool down to below 200°C with the furnace, take it out, and obtain the second intermediate product:

[0040] 2) Place the second intermediate product in a programmed cooling box to cool down to -80°C at a rate of 1°C / min, place 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 Ro...

Embodiment 2

[0050] The preparation method of cobalt alloy partitioned trabecular single-compartment femoral condyle prosthesis comprises the following steps:

[0051] 1) Using cobalt alloy powder as the raw material, the first intermediate product of the cobalt alloy partitioned trabecular unicompartmental femoral condyle prosthesis was obtained by 3D printing, and the first intermediate product was put into a hot isostatic pressing furnace and heated in argon Under gas protection, raise the temperature to 1170°C, place it at a constant temperature of 140MPa for 2 hours, drop to normal pressure, cool down to below 200°C with the furnace, take it out, and obtain the second intermediate product:

[0052] 2) Place the second intermediate product in a programmed cooling box to cool down to -100°C at a rate of 1°C / min, place it at a constant temperature for 7 hours, and take it out of the programmed cooling box; place it in liquid nitrogen for another 24 hours, and adjust the temperature to Ro...

Embodiment 3

[0063] The preparation method of cobalt alloy partitioned trabecular single-compartment femoral condyle prosthesis comprises the following steps:

[0064] 1) Using cobalt alloy powder as a raw material, the first intermediate product of the cobalt alloy partitioned trabecular unicompartmental femoral condyle prosthesis is obtained through 3D printing, and the first intermediate product is put into a hot isostatic pressing furnace and heated in a helium Under gas protection, raise the temperature to 1200°C, place it at a constant temperature of 110MPa for 1 hour, drop to normal pressure, cool down to below 200°C with the furnace, take it out, and obtain the second intermediate product:

[0065] 2) Place the second intermediate product in a programmed cooling box to cool down to -120°C at a rate of 1°C / min, place it at a constant temperature for 5 hours, and take it out of the programmed cooling box; place it in liquid nitrogen for another 36 hours, and adjust the temperature to ...

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Abstract

The invention discloses a cobalt alloy partitioned bone trabecula single-compartment femoral condyle prosthesis and a preparation method. The preparation method comprises the following steps: by taking cobalt alloy powder as a raw material, performing 3D printing integrated molding to obtain an intermediate product of the cobalt alloy partitioned bone trabecula single-compartment femoral condyle prosthesis, and performing hot isostatic pressing and a deep cooling process to obtain the cobalt alloy partitioned bone trabecula single-compartment femoral condyle prosthesis. The prosthesis comprises a femoral condyle articular surface and an osseointegration surface. Due to the partitioned bone trabecula, micro motion of the prosthesis and a bone interface can be reduced, and the initial stability is achieved; the stress shielding effect of the prosthesis on bone tissues is reduced, the femoral condyle bone tissue stress is uniform, excellent and uniform bone ingrowth performance is achieved, prosthesis looseness caused by osteoporosis after long-term implantation of the prosthesis is avoided, and long-term stability is achieved. Due to 3D printing integrated molding, the bone trabeculaand the entity are high in bonding strength, the bone trabecula does not easily drop, and the service life of the prosthesis is prolonged. The bone trabecula part of the prosthesis has excellent compression resistance; and the entity part releases residual stress, and the plasticity is enhanced.

Description

technical field [0001] The invention relates to the field of medical device joint prosthesis, in particular to a cobalt alloy partitioned trabecular unicompartmental femoral condyle prosthesis and a preparation method. Background technique [0002] The unicompartmental knee prosthesis is used to replace the unilateral diseased compartment of the knee joint. It has the characteristics of small surgical incision, less intraoperative osteotomy, and preservation of the knee ligament structure. Therefore, the recovery after unicompartmental replacement is fast and the preservation normal knee motion and proprioception. [0003] Biological unicompartmental knee prosthesis can achieve effective fit between bone tissue and the interface of the prosthesis, and can avoid the defects caused by bone cement fixation. At present, most biological unicompartmental knee prostheses are double-coated (titanium microporous + HA coating), which has problems such as coating peeling off and uneve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38A61F2/30B22F5/00B33Y10/00B33Y80/00B33Y70/00C22C19/07
CPCA61F2/30942A61F2/3859A61F2002/30011A61F2002/30985A61F2310/00029B22F5/00B33Y10/00B33Y70/00B33Y80/00C22C19/07
Inventor 李莉王献抗曹雨张月静杨友周红秀
Owner JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD
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