Additive-manufactured porous tantalum metal acetabular outer cup and preparation method thereof

An additive manufacturing, porous tantalum technology, applied in metal processing equipment, manufacturing tools, acetabular sockets, etc., can solve the problems of prosthesis loosening, high strength and modulus, and limited rough treatment layer thickness, and achieve limb restoration. function, improve joint function, restore stability

Pending Publication Date: 2020-07-28
深圳大洲医学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating has improved bone fusion and bone ingrowth, but there is a problem of delamination and peeling from the metal acetabular cup matrix, resulting in loosening of the prosthesis
Although the bone fusion performance of the metal acetabular cup with roughened surface has been improved, the thickness of the roughened layer is limited, the bone ingrowth is not obvious, and there are still problems of high strength and modulus, and the service life of the joint prosthesis is far lower than expected

Method used

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  • Additive-manufactured porous tantalum metal acetabular outer cup and preparation method thereof
  • Additive-manufactured porous tantalum metal acetabular outer cup and preparation method thereof
  • Additive-manufactured porous tantalum metal acetabular outer cup and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1 Biomimetic Acetabular Outer Cup with Porous Trabecular Bone Structure

[0038] like Figure 1-4 As shown, the acetabular outer cup in this embodiment is composed of a dense structure cup mouth 2 and a bionic bone trabecular porous structure hemispherical shell cup body 1, wherein the average wire diameter of the porous structure is 298 μm, and the average pore diameter is 878 μm; the porosity is 75.1%, and the pores are connected. Sex is 99%. The outer height of the cup mouth is 1mm, and the inner height is 5mm; the inside of the cup mouth is evenly distributed along the circumference of 10 cylindrical slots 4, the slot diameter is 3mm, and the depth is 1mm; the cup body of the porous structure hemispherical shell is provided with 7 through screw holes 3 , the inner wall of the screw hole is a dense layer with a thickness of 1mm; the diameter of the screw hole is 5mm.

[0039] The manufacturing steps of the bionic bone trabecular porous structure acetabular ...

Embodiment 2

[0049] Example 2 Rhombohedral acetabular cup with porous structure

[0050] like Figure 5-8 As shown, the acetabular outer cup of this embodiment is composed of a rhomboid dodecahedron porous structure hemispherical shell cup body 1, wherein the average wire diameter of the porous structure is 413 μm, the average pore diameter is 835 μm; the porosity is 70%, and the pore connectivity is 99%. The cup body of the porous structure hemispherical shell is provided with 4 through screw holes 3 , the inner wall of the screw holes is a dense layer with a thickness of 1 mm; the diameter of the screw holes is 5 mm.

[0051] The manufacturing steps of the rhombic dodecahedron porous structure acetabular outer cup are as follows:

[0052] Using modeling software to construct the three-dimensional model of the acetabular outer cup of the bionic trabecular porous structure, convert the three-dimensional model into the format required by the printing equipment and import it into the equipm...

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Abstract

The invention discloses an additive-manufactured porous tantalum metal acetabular outer cup and a preparation method thereof. 50% or above of the volume of the porous tantalum acetabular outer cup adopts a porous structure, the average pore size is 200-2000 [mu]m, the average wire diameter is 300-1000 [mu]m, the porosity is 50-95%, the pore connectivity is larger than 80%, the porous structure penetrates through a whole semispherical shell cup, the thickness is larger than 3 mm, and one or more screw holes are formed in the porous structure; the porous tantalum metal acetabular outer cup is integrally prepared by additive manufacturing technologies such as powder bed laser melting or electron beam melting with pure tantalum metal or tantalum alloy powder as a raw material, and the particlesize of raw material powder is 10-150 [mu]m; the rim of the porous tantalum acetabular outer cup is of a compact structure, the thickness is larger than 1 mm, and three or more clamping grooves are uniformly distributed in the inner side of the compact structure. The tantalum metal acetabular outer cup has the technical advantages as follows: the porous structure of the tantalum metal cup has mechanical properties close to those of human bone and facilitates rapid bone growth to form biological fixation and improve implantation stability.

Description

technical field [0001] The invention relates to the technical field of biomedical metal materials and medical devices, in particular to a porous tantalum metal acetabular outer cup manufactured by additive manufacturing and a preparation method thereof. Background technique [0002] The hip joint is the largest load-bearing joint in the human body. When the hip joint is painful, stiff, or deformed due to degeneration, disease, or trauma, and even inconvenient to move, and the symptoms cannot be relieved by drugs or other treatments, an artificial hip is usually surgically implanted. Joint prosthesis, so that patients can restore the normal physiological function of the hip joint. Artificial total hip replacement can relieve pain, improve joint function, restore joint stability and limb function, and has been recognized by most patients and orthopedic surgeons. The acetabular cup is one of the key components of artificial total hip joint prosthesis. Its comprehensive mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/34B22F3/11B22F3/24B33Y10/00B33Y40/00B33Y80/00
CPCA61F2/34B22F3/11B22F3/24B33Y10/00B33Y40/00B33Y80/00A61F2002/3483A61F2002/3092A61F2002/30985A61F2002/3097A61F2002/30906A61F2002/3401A61F2310/00131B22F2003/248B22F2999/00B22F10/28Y02P10/25
Inventor 杨景周张大琛张树培杨景浩陈海深
Owner 深圳大洲医学科技有限公司
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