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Additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve and preparation method

A technology of additive manufacturing and trabecular bone, applied in the direction of hip joints, manufacturing tools, additive processing, etc., can solve the problems of powder failure to be well sintered, uneven microstructure, poor mechanical properties, etc., to achieve Improve long-term stability, prosthesis life, and the effect of not falling off

Pending Publication Date: 2021-01-01
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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  • Additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve and preparation method
  • Additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve and preparation method
  • Additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Additively manufactured titanium alloy partitioned trabecular bone artificial hip cuff (see figure 1 , 2 , 3), comprising a variable-diameter circular tube 1 with a large upper part and a smaller lower part, the upper outer surface of the variable-diameter circular tube 1 is connected with a bump 3, and the longitudinal section of the bump 3 passing the center line is triangular, and the shape of the bump is The cross-section is formed by the arc of a part of the variable-diameter circular tube and the horizontal U-shape, which is arranged in a large upper part and a smaller one. The axial section 5 of the variable-diameter circular tube perpendicular to the center line of the block and the cross-section 15 of the middle and lower part of the variable-diameter circular tube divide the external surface of the variable-diameter circular tube and the bump into an inner upper zone 8 and an inner lower zone 9, and an outer upper zone 10 and the outer lower area 11; the rati...

Embodiment 2

[0046] Additively manufactured titanium alloy partitioned trabecular bone artificial hip joint cuff, including a diameter-reducing circular tube 1 with a large upper part and a smaller lower part. The longitudinal section of the center line is triangular, and the cross section of the bump is enclosed by the arc of a part of the variable-diameter circular tube and the horizontal U-shape. The outer surface is provided with bone trabeculae 4, and the axial section 5 of the variable diameter circular tube perpendicular to the center line of the bump and the cross section 15 of the middle and lower part of the variable diameter circular tube divide the outer surface of the variable diameter circular tube and the convex block into the upper and lower inner sides. Zone 8 and inner lower zone 9, outer upper zone 10 and outer lower zone 11; the ratio of the height above the cross section 15 of the variable diameter circular tube to the height below is 2:1;

[0047] The bone trabeculae ...

Embodiment 3

[0057] Additively manufactured titanium alloy partitioned trabecular bone artificial hip joint cuff, including a diameter-reducing circular tube 1 with a large upper part and a smaller lower part. The longitudinal section of the center line is triangular, and the cross section of the bump is enclosed by the arc of a part of the variable-diameter circular tube and the horizontal U-shape. The outer surface is provided with bone trabeculae 4, and the axial section 5 of the variable diameter circular tube perpendicular to the center line of the bump and the cross section 15 of the middle and lower part of the variable diameter circular tube divide the outer surface of the variable diameter circular tube and the convex block into the upper and lower inner sides. Zone 8 and inner lower zone 9, outer upper zone 10 and outer lower zone 11; the ratio of the height above the cross section 15 of the variable diameter circular tube to the height below is 2.5:1;

[0058] The bone trabecula...

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Abstract

The invention discloses an additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve and a preparation method. The preparation method comprises the following steps: (1) titanium alloy powder is taken as a raw material, 3D printing integrated forming is conducted to obtain an intermediate product of the additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve, and hot isostatic pressing and copious cooling processes are conducted to obtain an additive manufacturing titanium alloy partition bone trabecula artificial hip joint oversleeve; and the oversleeve structurally comprises a reducing round pipe with a large upper portion and a small lower portion, a protruding block is connected to the outer surface of the upperportion of the reducing round pipe, and bone trabecula arranged in a partitioned mode is arranged on the outer surface of the reducing round pipe and the outer surface of the protruding block. According to the method, the proportion of a bone ingrowth area in a bone tissue finite element model reaches 75%, bone ingrowth is facilitated, and the long-term stability after implantation is improved; 3D printing integrated forming is adopted, the bonding strength of the bone trabecula and a solid body is high, falling is not prone to occurring, and the service life of the prosthesis is prolonged; and the solid part releases residual stress, and the plasticity of the solid part is improved.

Description

technical field [0001] The invention relates to the technical field of artificial joints, in particular to an artificial hip joint cuff made of titanium alloy partitioned trabecular bone by additive manufacturing and a preparation method thereof. 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. The osseointegration interface of non-cemented prostheses is usually sprayed with hydroxyapatite coating or titanium coating on the surface, but the surface coating is ea...

Claims

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Application Information

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IPC IPC(8): A61F2/32A61F2/30B22F5/00B33Y10/00B33Y70/00B33Y80/00C22C14/00
CPCA61F2/30734A61F2/32A61F2002/3006A61F2002/30738A61F2002/30985A61F2310/00023B22F5/00B33Y10/00B33Y70/00B33Y80/00C22C14/00
Inventor 提浩强叶金铎曹雨徐福东李莉
Owner JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD