Artificial hip stem with low elasticity modulus

A low elastic modulus, hip joint technology, applied in the direction of hip joints, femoral heads, joint implants, etc., can solve prosthetic looseness, high elastic modulus, mechanical properties of implant prosthesis and bone tissue cannot interact Matching and other issues to achieve good biocompatibility

Inactive Publication Date: 2010-05-19
BEIJING AKEC MEDICAL
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AI Technical Summary

Problems solved by technology

[0002] Artificial hip replacement surgery has become a relatively common surgical operation in the medical field, but the metal materials used are mostly stainless steel, titanium alloy, cobalt alloy, and biological ceramics are also used. Their common defect is that the elastic modulus is too high. High, such as titanium alloy is 110 ~ 120GPa, stainless steel and cobalt alloy is as high as 200GPa or more; while the elastic modulus of cortical bone and cancellous bone is only about 15GPa and 1.5GPa respectively
The elastic modulus of metal materials or ceramic materials is more than ten times or even dozens of times that of bone tissue. The mechanical properties of the implant prosthesis made of the above materials cannot match the bone tissue, and the high elastic modulus will make the implant false. Too little load on the surrounding bone tissue leads to bone resorption, bone atrophy, and disuse osteoporosis, which eventually leads to loosening of the prosthesis

Method used

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  • Artificial hip stem with low elasticity modulus
  • Artificial hip stem with low elasticity modulus
  • Artificial hip stem with low elasticity modulus

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Embodiment Construction

[0016] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 As shown, a low elastic modulus artificial hip joint femoral stem of the present invention is characterized in that it includes a head 1, a neck 2 and a handle body 3, the handle body 3 is designed as a hollow structure, and the surface of the handle body 3 is a hole 4 Or the mesh 5 structure keeps the hollow part inside the handle body 3 in communication with the outside, the number and shape of the holes 4 can be designed according to the size specification and the stress situation of the handle body 3, and the number and shape of the mesh hole 5 can be designed according to the handle body 3 size specifications and stress conditions, the mesh can be designed as a single layer, it can also be designed as multi-layered, there is an opening 7 at the far end of the handle body 3, and the doctor removes the broken bone particles 6 from the opening according to the needs before the operation. ...

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Abstract

The invention relates to an artificial hip stem with low elasticity modulus, which comprises a head part, a neck part and a stem body, wherein the stem body is designed into a hollow structure, and the surface of the stem body is provided with a plurality of holes or a mesh structure to make sure that the hollow part inside the stem body is kept communicating with the outside. Before implantation, the hollow part of the stem body is filled with autologous or xenogenous crushed bone particles; after external bone tissues grow with the crushed bone particles filled into the stem body into a whole, the total elasticity modulus can be approximate to that of human bone so as to lastingly and effectively prevent the loose action between the artificial hip stem and sclerotin.

Description

technical field [0001] The invention relates to a low elastic modulus artificial hip joint femoral handle. Background technique [0002] Artificial hip replacement surgery has become a relatively common surgical operation in the medical field, but the metal materials used are mostly stainless steel, titanium alloy, cobalt alloy, and biological ceramics are also used. Their common defect is that the elastic modulus is too high. High, such as titanium alloy is 110 ~ 120GPa, stainless steel and cobalt alloy is as high as 200GPa or more; while the elastic modulus of cortical bone and cancellous bone is only about 15GPa and 1.5GPa respectively. The elastic modulus of metal materials or ceramic materials is more than ten times or even dozens of times that of bone tissue. The mechanical properties of the implant prosthesis made of the above materials cannot match the bone tissue, and the high elastic modulus will make the implant false. Too little load on the surrounding bone tiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32A61L27/10A61L27/04A61L27/32
CPCA61F2/36A61F2002/30001
Inventor 张卫平
Owner BEIJING AKEC MEDICAL
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