Zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing oxide layer and preparation method

A technology of zirconium-niobium alloy and oxide layer, which is applied in the fields of medical science, prosthesis, additive processing, etc., can solve the problems of poor sintering of powder, uneven microstructure, poor mechanical properties, etc., and achieve Reduce stress shielding effect, improve initial stability and long-term stability, and excellent biocompatibility

Active 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, 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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  • Zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing oxide layer and preparation method
  • Zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing oxide layer and preparation method
  • Zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing oxide layer and preparation method

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Experimental program
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Effect test

Embodiment 1

[0043] Oxide-containing zirconium-niobium alloy partitioned trabecular unicompartmental femoral condyle (see Figure 1-2 ) preparation method, comprising the steps of:

[0044] 1) Using zirconium-niobium alloy powder as the raw material, the first intermediate product of the femoral condyle with zirconium-niobium alloy partitioned trabecular unicompartment with oxide layer was obtained by 3D printing, and the first intermediate product was put into a hot isostatic pressing furnace. Under the protection of helium, raise the temperature to 1250°C, place it at a constant temperature of 180MPa for 3 hours, drop to normal pressure, and take it out with the furnace cooling to below 200°C to obtain the second intermediate product;

[0045] 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...

Embodiment 2

[0058] The preparation method of the single-compartment femoral condyle of the zirconium-niobium alloy partitioned trabecular bone comprising an oxide layer comprises the following steps:

[0059] 1) Using zirconium-niobium alloy powder as the raw material, the first intermediate product of the femoral condyle with zirconium-niobium alloy partitioned trabecular unicompartment with oxide layer was obtained by 3D printing, and the first intermediate product was put into a hot isostatic pressing furnace. Under the protection of helium, 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 the second intermediate product;

[0060] 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 n...

Embodiment 3

[0073] 1. The preparation method of trabecular unicompartmental femoral condyle containing oxide layer zirconium-niobium alloy partition, comprising the following steps:

[0074] (1) Using zirconium-niobium alloy powder as the raw material, the first intermediate product of the femoral condyle with zirconium-niobium alloy partitioned trabecular unicompartment containing the oxide layer was obtained through 3D printing, and the first intermediate product was placed in 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 the second intermediate product;

[0075] (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 nit...

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Abstract

The invention discloses a zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing an oxide layer and a preparation method. The preparation method comprises thesteps that zirconium-niobium alloy powder serves as a raw material, an intermediate product of the zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing theoxide layer is obtained through 3D printing integral forming, then the zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing the oxide layer is obtained through hot isostatic pressing, cryogenic treatment and surface oxidation, the femoral condyle comprises a femoral condyle articular surface and an osseointegration surface, and the osseointegration surface is provided with the bone trabecula in a partitioned manner. Micro-motion of the prosthesis and a bone interface can be reduced, the stress shielding effect of the prosthesis on bone tissue is reduced, the stress of the femoral condyle bone tissue is uniform, and the initial stability and long-term stability of the single-compartment femoral condyle are improved. According to the preparation method, excellent biocompatibility and bone ingrowth of the osseointegration interface and super-strong wear resistance and low wear rate of a friction interface are integrally realized; the femoral condyle bone trabecula has excellent compression resistance; and the compressive yield strength and plasticity of the solid part are enhanced.

Description

technical field [0001] The invention relates to the field of artificial joints, in particular to a zirconium-niobium alloy containing an oxide layer and a trabecular single-compartment femoral condyle and a preparation method thereof. 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 prosthesis interface, avoiding 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): B22F5/00B33Y10/00B33Y80/00A61L27/04B22F3/15B22F3/24C22C16/00
CPCB22F5/00B22F3/15B22F3/24B33Y10/00B33Y80/00A61L27/047C22C16/00B22F2003/248A61L2430/24B33Y70/00C22C1/0458B22F10/00B22F10/60B22F2998/10B22F2999/00Y02P10/25B22F10/64B22F10/66B22F2203/11
Inventor 陈伟曹雨张月静杨友李莉
Owner JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD
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