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Additive manufacturing porous tantalum artificial tibia cushion block

An additive manufacturing, porous tantalum technology, applied in manufacturing tools, additive manufacturing, metal processing equipment, etc., can solve the problems of poor matching of human cancellous bone mechanical properties, osteolysis, poor mechanical properties, etc., to solve clinical problems. demand, the effect of promoting rapid growth and regeneration, excellent biocompatibility

Pending Publication Date: 2021-11-05
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

However, the mechanical properties of the traditional porous tantalum tibial spacer are not good, and the mechanical properties of human cancellous bone are poorly matched, and it is easy to produce stress shielding effect and cause osteolysis

Method used

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  • Additive manufacturing porous tantalum artificial tibia cushion block
  • Additive manufacturing porous tantalum artificial tibia cushion block
  • Additive manufacturing porous tantalum artificial tibia cushion block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, the porous truss structure inside the tibial spacer of this embodiment is a bionic bone trabecular structure, the proximal tibial surface 1 is in the shape of left and right steps, the height difference between the left and right steps is 15 mm, and the wire diameter of the porous truss structure is 0.3 mm. mm, average pore diameter 0.8mm, porosity 70%, the distance between the left end surface and the right end surface is 50mm, the distance between the front end surface and the rear end surface is 32mm, the minimum height of tibial proximal surface 1 and tibial distal surface 2 is 15mm, the left end The front surface and the right end surface are respectively inclined at 20° from the vertical direction, the front end surface and the rear end surface are inclined at 15° from the vertical direction, the thickness between the inner surface 4 and the outer surface 3 is 5mm, and the depth of the cylindrical groove is 3mm.

[0036] The medical pure...

Embodiment 2

[0053] Such as figure 2 As shown, the porous truss structure inside the tibial pad of the present embodiment is a rhombic dodecahedron structure, the wire diameter of the porous truss structure is 0.3 mm, the average pore diameter is 1 mm, the porosity is 76%, and the distance between the left end face and the right end face 55mm, the distance between the front end surface and the rear end surface is 33mm, the distance between the tibia proximal surface 1 and the tibia distal surface 2 is 15mm, the left end surface and the right end surface are respectively inclined at 20° from the vertical direction, the front end surface and the rear end surface are in line with the The vertical direction is inclined at 15°, the thickness between the inner surface 4 and the outer surface 3 is 5mm, and the depth of the cylindrical groove is 3mm.

[0054] The tantalum alloy powder is integrally formed by the additive manufacturing process, and the particle size of the powder is 15-45 μm. The ...

Embodiment 3

[0070] Such as image 3 As shown, the porous truss structure inside the tibial pad of this embodiment is a bionic bone trabecular structure, and the proximal surface of the tibia is in the shape of a left and right ladder, with an arc transition between the left and right steps, and the height difference between the left and right steps is 15mm. The porous truss The wire diameter of the structure is 0.25mm, the average pore diameter is 0.35mm, the porosity is 65%, the distance between the left end surface and the right end surface is 55mm, the distance between the front end surface and the rear end surface is 33mm, the distance between the proximal tibial surface 1 and the distal tibial surface 2 The distance between them is 15mm, the left end surface and the right end surface are respectively inclined at 20° to the vertical direction, the front end surface and the rear end surface are inclined at 15° to the vertical direction, the thickness between the inner surface 4 and the ...

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Abstract

The invention provides an additive manufacturing porous tantalum artificial tibia cushion block which is integrally formed by tantalum-containing metal powder through an additive manufacturing process, the interior of the tibia cushion block is of a porous truss structure, the porosity is 50%-85%, the wire diameter is 200-500 [mu]m, and the aperture is 300-1500 [mu]m; the shape of the tibia cushion block is a hollow table body matched with the tibia of a human body, the tibia cushion block comprises a tibia near-end face, a tibia far-end face, an outer surface and an inner surface, a cylindrical surface groove is formed in the inner surface, and pores of the porous truss structure are filled with bioactive peptides. One-time forming is achieved in an additive manufacturing mode, the reasonable pore channel design enables the artificial bone to have the mechanical property very similar to that of cancellous bone of the human body, and meanwhile, metal tantalum has excellent biocompatibility, can fused with bone cells and can effectively avoid osteolysis caused by the stress shielding effect; and the pores are filled with the bioactive peptides, so that ingrowth and regeneration of joint tissues can be quickly induced, and the adaptability of the tibia cushion block is improved.

Description

technical field [0001] The invention relates to the technical field of medical implants, in particular to a porous tantalum artificial tibial pad manufactured by additive manufacturing. Background technique [0002] Total knee arthroplasty has become a well-established and commonly used surgical technique. It has the advantages of relieving pain in patients with end-stage knee arthropathy, restoring or improving knee joint function, and improving the quality of life of patients that other operations cannot replace. However, in patients undergoing total knee arthroplasty and revision, especially those with severe knee valgus deformity, there are often different degrees of tibial defect. Surgical treatment of tibial defects includes filling with crushed bone, bone impaction grafting, allograft bone grafting, reconstruction with bone cement screws, dry end cuffs, etc. In some cases, it is often necessary to remove a relatively thick portion of the proximal tibia and replace i...

Claims

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Application Information

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IPC IPC(8): A61F2/38A61F2/30A61L27/04A61L27/22A61L27/54A61L27/56
CPCA61F2/389A61F2/30771A61F2/30942A61L27/047A61L27/227A61L27/56A61L27/54A61F2002/30784A61F2002/30985A61F2002/30943A61F2002/3097A61F2002/30968A61F2310/00131A61L2300/252A61L2300/412C08L89/00
Inventor 杨景周张大琛陈海深杨景浩张树培
Owner 深圳大洲医学科技有限公司
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