Artificial joint femoral stem and preparation method thereof

A technology for artificial joints and femoral stems, applied in the direction of femur, femoral head, femoral shaft, etc., can solve the problems of unstable long-term fixation effect, poor bone ingrowth effect, and recovery after surgery failure, to maintain effective mechanical support, mechanical High strength and reduced stress shielding effect

Active Publication Date: 2017-03-22
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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  • Artificial joint femoral stem and preparation method thereof
  • Artificial joint femoral stem and preparation method thereof
  • Artificial joint femoral stem and preparation method thereof

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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 used to form holes or grooves on the body of the artificial joint femoral stem, and then the additive manufacturing technology is used to construct columnar processes, spherical processes or other three-dimensional structures in the holes or grooves. shape.

[0020] The various processing methods are any processing methods known in the art that can form holes or grooves on the body of the artificial joint femoral stem, 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, cobalt-chromium alloys, wh...

Embodiment 1

[0024] An artificial joint femoral stem, the preparation method of which comprises: manufacturing the artificial joint femoral stem body through vacuum dewaxing casting or forging through titanium alloy, and then adopting the laser melting method on the long-term contact part between the artificial joint femoral stem body and human bone Holes or grooves are generated on the surface, and then 3D printing is used to construct columnar protrusions, spherical protrusions or other three-dimensional shapes in the holes; the laser melting method adopts the existing technology, so that the diameter of the holes is 50 μm, the depth is 25 μm, and the width of the grooves is 50μm, and the depth is 25μm; the 3D printing technology adopts the existing technology, so that the height of the columnar, spherical or other three-dimensional shapes is 2μm.

Embodiment 2

[0026] An artificial joint femoral stem, the preparation method of which comprises: manufacturing the artificial joint femoral stem body through vacuum dewaxing casting or forging through titanium alloy, and then adopting the laser melting method on the long-term contact part between the artificial joint femoral stem body and human bone Holes or grooves are generated on the surface, and then 3D printing is used to construct columnar protrusions, spherical protrusions or other three-dimensional shapes in the holes; this laser melting method adopts the existing technology, so that the diameter of the hole is 10000 μm, the depth is 5000 μm, 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 columnar, spherical or other three-dimensional shape 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 one of the worldwide problems in orthopedic treatment, seriously affecting the quality of life of patients. The artificial joint femoral stem is a common orthopedic material in clinical application. The wide application of artificial joint femoral stem in orthopedic treatment has significantly improved the problems that could not be solved clinically in the past, and the success rate of implantation has also reached quite satisfactory results. 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 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/36A61F2/30B33Y80/00
CPCA61F2/36A61F2002/30001A61F2/30771A61F2/30942A61F2/3662A61F2/367A61F2/3672A61F2/3676A61F2002/2825A61F2002/30108A61F2002/30772A61F2002/3097A61F2002/30985A61F2002/3625A61F2002/368A61F2240/002
Inventor 吴栋
Owner JINGWEI MEDICAL EQUIP MFG SHENZHEN CO LTD
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