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A femoral stem of artificial joint and its preparation method

A technology of artificial joints and femoral stems, which is applied in the direction of hip joints, femoral heads, joint implants, etc., can solve the problems of unstable long-term fixation effect, poor bone ingrowth effect, and rehabilitation after surgery failure, so as to maintain effective mechanics Support, high mechanical strength, reduce the effect of stress shielding

Active Publication Date: 2018-06-01
JINGWEI MEDICAL EQUIP MFG SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing artificial joint femoral stem either uses additive manufacturing technology to form a certain rough surface on the artificial joint femoral stem body, or uses subtractive manufacturing technology to generate holes and other structures on the artificial joint femoral stem body. The artificial joint femoral stem and the bone prepared by advanced technology or subtractive manufacturing technology have poor bone ingrowth effect, insufficient fusion, and unstable long-term fixation effect, which may lead to operation failure or poor postoperative rehabilitation in severe cases.

Method used

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  • A femoral stem of artificial joint and its preparation method
  • A femoral stem of artificial joint and its preparation method
  • A femoral stem of artificial joint and its preparation method

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preparation example Construction

[0019] In the preparation method of the artificial joint femoral stem of the present invention, various processing methods are first used to form holes or grooves on the body of the artificial joint femoral stem, and then the studs, bulbous processes or other three-dimensional structures are constructed in the holes or grooves by additive manufacturing technology. shape.

[0020] The various processing methods are any processing methods known in the art that can create holes or grooves on the artificial joint femoral stem body, such as casting, forging, laser melting, acid etching, and the like.

[0021] The additive manufacturing technology is preferably but not limited to 3D printing.

[0022] The artificial joint femoral stem body is preferably but not limited to be made by vacuum dewaxing casting or forging of biocompatible metal materials, wherein the biocompatible metal materials are preferably but not limited to titanium alloys and cobalt-chromium alloys. Titanium alloys incl...

Embodiment 1

[0024] An artificial joint femoral stem, and its preparation method includes: manufacturing an artificial joint femoral stem body by vacuum dewaxing casting or forging from a titanium alloy, and then adopting a laser melting method on the part of the artificial joint femoral stem body in long-term contact with human bone Holes or grooves are formed on the surface, and then 3D printing is used to construct studs, ball protrusions or other three-dimensional shapes in the holes; this laser melting method adopts the existing technology, so that the hole diameter is 50μm, the depth is 25μm, and the width of the groove is 50μm and a depth of 25μm; the 3D printing technology adopts the existing technology, so that the height of the columnar, bulbous or other three-dimensional shape is 2μm.

Embodiment 2

[0026] An artificial joint femoral stem, and its preparation method includes: manufacturing an artificial joint femoral stem body by vacuum dewaxing casting or forging from a titanium alloy, and then adopting a laser melting method on the part of the artificial joint femoral stem body in long-term contact with human bone Holes or grooves are formed on the surface, and then 3D printing is used to construct studs, bulbs or other three-dimensional shapes in the holes; the laser melting method adopts the existing technology, so that the hole diameter is 10000μm, the depth is 5000μm, and the width of the groove is 10000μm, the depth is 5000μm; the 3D printing technology adopts the existing technology, so that the height of the pillars, bulbs or other three-dimensional shapes is 6000μm.

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Abstract

The invention discloses an artificial joint femoral stem and a preparation method thereof. The preparation method includes the steps: firstly, forming a hole or a groove in an artificial joint femoral stem body by the aid of various processing methods; secondly, building a cylindrical projection, a spherical projection or other stereoscopic shapes in the hole or the groove by the aid of additional material manufacturing technologies. A locking function is formed among an implant and bone tissues, ideal space structures for growing new bones can be provided, attachment and proliferation abilities of bone tissue cells are improved, excellent bone combination is achieved, convergence among the artificial joint femoral stem and autologous tissues is improved, and the artificial joint femoral stem effectively plays a role in a human body for a long time, is excellent in mechanical property and high in mechanical strength, can effectively reduce stress shielding and keep effective mechanical support.

Description

Technical field [0001] The invention relates to the technical field of medical devices, in particular to an orthopedic implant artificial joint femoral stem and a preparation method thereof. Background technique [0002] Artificial joint disease caused by disease and trauma is a common clinical disease, and it is also one of the worldwide problems in orthopedic treatment, which seriously affects the quality of life of patients. Artificial joint femoral stem is a common orthopedic material in clinical applications. The widespread application of artificial joint femoral stems in orthopedic treatment has significantly improved the problems that could not be solved clinically in the past, and the implantation success rate has also reached quite satisfactory results. Existing artificial joint femoral stems either use additive manufacturing technology to form a certain rough surface on the artificial joint femoral stem body, or use subtractive manufacturing technology to create holes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/36A61F2/30B33Y80/00
CPCA61F2/36A61F2002/30001
Inventor 吴栋
Owner JINGWEI MEDICAL EQUIP MFG SHENZHEN CO LTD
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