Zirconium-niobium alloy hip joint prosthesis system containing oxide layer and preparation method

A hip joint prosthesis, zirconium niobium alloy technology, applied in the direction of hip joints, prostheses, joint implants, etc., can solve problems such as uneven microstructure, poor mechanical properties, surface coating peeling off, etc., to achieve excellent Bone ingrowth and biocompatibility, excellent biocompatibility, the effect of achieving super wear resistance

Active Publication Date: 2021-02-26
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 surface coating in the first method has the risk of falling off, which affects the use effect
The cuff in the second method is an assembly structure with the femoral stem. Clinical studies have shown that in order to combine the femoral stem with the cuff in the structural design, there is a problem of sudden change in the section of the head and neck of the stem in the structural design. There are very serious stress concentrations
The problem

Method used

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  • Zirconium-niobium alloy hip joint prosthesis system containing oxide layer and preparation method
  • Zirconium-niobium alloy hip joint prosthesis system containing oxide layer and preparation method
  • Zirconium-niobium alloy hip joint prosthesis system containing oxide layer and preparation method

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Effect test

Embodiment 1

[0063] A method for preparing a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer, comprising the following steps:

[0064] 1) Preparation of acetabular cup and femoral stem:

[0065] 1-1) The first intermediate product of the acetabular cup and the first intermediate product of the femoral stem are respectively obtained by 3D printing with zirconium-niobium alloy powder as the raw material, and the two first intermediate products are put into a hot isostatic pressing furnace, Under the protection of helium, raise the temperature to 1250°C, place it at 180MPa for 3 hours at a constant temperature, drop to normal pressure, and take it out with the furnace cooling to below 200°C to obtain two second intermediate products;

[0066] 1-2) Place the two second intermediate products in a programmed cooling box to cool down to -80°C at a rate of 1°C / min, place them at a constant temperature for 10 hours, take them out of the programmed cooling box, and plac...

Embodiment 2

[0085] A method for preparing a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer, comprising the following steps:

[0086] 1) Preparation of acetabular cup and femoral stem:

[0087] 1-1) The first intermediate product of the acetabular cup and the first intermediate product of the femoral stem are respectively obtained by 3D printing with zirconium-niobium alloy powder as the raw material, and the two first intermediate products are put into a hot isostatic pressing furnace, Under the protection of argon, raise the temperature to 1325°C, place it at a constant temperature of 160MPa for 2 hours, drop to normal pressure, and take it out with the furnace cooling to below 200°C to obtain two second intermediate products;

[0088] 1-2) Place the two second intermediate products in a programmed cooling box to cool down to -100 °C at a rate of 1 °C / min, keep them at a constant temperature for 7 hours, take them out of the programmed cooling box, and plac...

Embodiment 3

[0107] The preparation method of the zirconium-niobium alloy hip joint prosthesis system containing oxide layer is characterized in that it comprises the following steps:

[0108] 1) Preparation of acetabular cup and femoral stem:

[0109] 1-1) The first intermediate product of the acetabular cup and the first intermediate product of the femoral stem are respectively obtained by 3D printing with zirconium-niobium alloy powder as the raw material, and the two first intermediate products are put into a hot isostatic pressing furnace, Under the protection of argon, raise the temperature to 1400°C, place it at a constant temperature of 140MPa for 1 hour, drop to normal pressure, and take it out with the furnace cooling to below 200°C to obtain two second intermediate products;

[0110] 1-2) Place the two second intermediate products in a programmed cooling box to cool down to -120 °C at a rate of 1 °C / min, keep them at a constant temperature for 5 hours, take them out of the progr...

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Abstract

The invention discloses a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer and a preparation method. The system comprises a femoral stem, a femoral head, a lining and an acetabular cup; the acetabular cup and the femoral stem are prepared from zirconium-niobium alloy powder serving as a raw material through hot isostatic pressing, cryogenic treatment and surface oxidation; the acetabular cup and the femoral stem are provided with a partition bone trabecula; and the femoral stem and the acetabular cup are integrally formed through 3D printing, the problems that a complex structure cannot be manufactured through traditional machining, and connection and matching of an oversleeve and a femoral stem body fail are solved, the bone trabecula and a solid body are highin bonding strength and not prone to disengagement, and the service life of the prosthesis is prolonged. The bone trabecula enables most compressive strain values of bone tissue to be within 1000-3000 microstrain, accords with the bone growth theory, guarantees uniform ingrowth of a bone in a bone trabecula area, and achieves excellent biocompatibility and bone ingrowth of an osseointegration interface and super-strong wear resistance and a low wear rate of a friction interface. The oxidation layer is formed on the surfaces of the femoral head and the lining after oxidation, so that super-strong wear resistance and low wear rate of the friction interface are realized.

Description

technical field [0001] The invention relates to the technical field of artificial joints, in particular to a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer and a preparation method. Background technique [0002] Artificial hip replacement surgery is one of the most important and effective operations for the treatment of end-stage diseases such as femoral head necrosis, hip dysplasia, degenerative hip osteoarthritis, rheumatoid arthritis, etc. , such patients are increasing year by year. [0003] Currently clinically used artificial hip joint prosthesis includes bone cement fixed prosthesis and non-cement fixed prosthesis. Among them, the non-cemented prosthesis has been more and more widely used because of its good bone ingrowth performance. [0004] The osseointegration interface of non-cemented hip prosthesis usually adopts the following two methods: the first is spraying hydroxyapatite coating or titanium coating on the surface of the femo...

Claims

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Application Information

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IPC IPC(8): B22F5/10B22F10/64C22F1/02C22F1/18B22F3/11C21D9/00C22C16/00A61F2/36A61L27/04A61L27/30A61L27/50B33Y80/00
CPCB22F5/10B22F3/15B22F3/24C22F1/02C22F1/186B22F3/11C21D9/0068C22C16/00A61F2/3609A61F2/3662A61L27/047A61L27/306A61L27/50B33Y80/00B22F2003/248B22F2003/247A61F2002/3006A61F2002/30985A61F2002/3611A61L2430/24B22F2998/10A61L2400/18A61L2430/02A61F2/3094A61F2/32A61F2/34A61F2002/3401A61F2002/3403A61F2/36A61F2002/365A61F2002/3092A61F2002/30004A61F2002/30011A61F2/30767A61F2310/00485A61F2310/00491Y02P10/25B22F10/00A61F2002/30971
Inventor 刘念叶金铎提浩强周红秀
Owner JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD
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