Novel artificial hip joint made of porous Ti

A technology of porous titanium and hip joints, applied in the direction of hip joints, joint implants, joint implants, etc., can solve the problems of low safety and service life, and unsatisfactory bone ingrowth effect of artificial hip joint prosthesis , to achieve the effect of improving early load capacity, improving long-term stability, and good biocompatibility

Active Publication Date: 2016-12-21
ZHONGAO HUICHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, it refers to constructing a porous titanium surface on the surface of the prosthetic cup and femoral stem in contact with the host bone tissue, and using its three-dimensional connected porous structure of bone-like trabeculae to promote the transformation of mesenchymal cells into bone tissue and induce the formation of host bone tissue , to solve the problems of unsatisfactory bone ingrowth effect of artificial hip joint prosthesis and low stability, safety and service life of artificial prosthesis in the later stage of implantation

Method used

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  • Novel artificial hip joint made of porous Ti
  • Novel artificial hip joint made of porous Ti
  • Novel artificial hip joint made of porous Ti

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An artificial hip joint with porous titanium material as the joint surface, such as Figure 1 to 4 and Figure 6 to Figure 8 As shown, it includes a femoral stem 4 with a porous titanium surface layer, a femoral ball head 3, an acetabular lining 2 and a porous titanium acetabular cup 1. The porous titanium material is constructed on the surface of the acetabular cup and the femoral stem; in this application , The acetabular lining is polyethylene lining.

[0039] In this application Figure 8 Among them, Ti is porous titanium; B is canine femoral cancellous bone.

[0040] Porous titanium is made by mixing 0-45μm Ti6Al4V powder and gelatin forming agent into a uniform slurry, injection molding, and sintering in high temperature vacuum. Calculated by weight percentage, the content of C element in Ti6Al4V powder is 0.05wt%, the content of O element is 0.8wt%, the content of N element is 0.2wt%, the content of Fe element is 0.03wt%, and the content of Si element is less than 0.0...

Embodiment 2

[0045] An artificial hip joint with porous titanium as the joint surface, such as Figure 1 to Figure 5 and Figure 7 with Figure 8 As shown, it includes a femoral stem 4 with a porous titanium surface layer, a femoral ball head 3, an acetabular lining 2 and a porous titanium acetabular cup 1. The porous titanium material is constructed on the surface of the acetabular cup and the femoral stem; in this application, The acetabular lining is polyethylene lining.

[0046] Porous titanium is made by mixing 15-53μm Ti6Al4V powder with gelatin forming agent to form a uniform slurry, injection molding, and sintering in high temperature vacuum. Calculated by weight percentage, the content of C element in Ti6Al4V powder is 0.011wt%, the content of O element is 0.12wt%, the content of N element is 0.013wt%, the content of Fe element is 0.2wt%, and the content of Si element is less than 0.035wt% . The porous titanium has an average pore diameter of 500 μm, a porosity of 80%, an elastic m...

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Abstract

The invention relates to a novel artificial hip joint made of porous Ti. A porous Ti material with pore diameter being 400-1000 mu m and porosity being 45%-85% is prepared from Ti6Al4V powder with pore diameter smaller than 100 mu m as raw materials through slurry injection molding and vacuum sintering. The porous Ti material can be taken as a biomimetic bone implantation material and solves the problem of interface loosening between a metal joint and host bone tissue of a bone implantation prosthesis. The artificial hip joint with porous Ti as the surface is designed with the porous Ti material as the core, contact interfaces between the artificial hip joint prosthesis with the porous Ti surface and the host bone tissue are porous Ti, and the artificial hip joint prosthesis specifically comprises a femoral stem with a porous Ti surface layer and a porous Ti acetabular cup. The porous Ti has effects of prompting mesenchymal cells to be transformed into cells of the bone tissue and inducing tissue generation, bones are formed between the interfaces in the early stage, early load of the artificial hip joint prosthesis is effectively increased, and the long-term stability of the artificial hip joint prosthesis after implantation in vivo is effectively improved.

Description

Technical field [0001] The invention relates to an artificial hip joint prosthesis constructed with porous titanium materials, and specifically refers to using the structural characteristics of porous titanium materials to improve the biological fixation effect between the artificial hip joint prosthesis and the host bone tissue, and belongs to the new material in medical treatment. Application in the field of device technology. Background technique [0002] The interface combination between the internal implant and the host bone is a key factor to maintain the initial and long-term stability of the internal implant, increasing the bone formation between the bone-implant prosthesis interface, and making the artificial prosthesis and the host bone form firm The osseointegration can achieve the effect of near and long-term fixation and reduce the occurrence of prosthesis loosening. At present, the joints used in artificial hip replacement are metal joints. The degree of fusion bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32A61F2/34A61L27/56A61L27/50A61L27/06C22C1/08C22C14/00B22F3/11
CPCA61L27/06A61L27/50A61L27/56A61F2/0077A61F2/32A61F2/34C22C14/00B22F3/1121A61L2430/02B22F2998/10A61F2310/00023B22F1/10B22F3/225
Inventor 李瑞玲金攻涂江平李众利李玲玲郭立
Owner ZHONGAO HUICHENG TECH CO LTD
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