Hip joint replacement prosthesis

A hip replacement and prosthesis technology, applied in hip joints, prostheses, joint implants, etc., can solve the problems of uneven distribution of elastic modulus, self-weight, affecting functions, etc., achieve good structural mechanical properties, prevent The effect of sinking and rotating, enhancing the firmness of the connection

Active Publication Date: 2017-07-04
CHONGQING RUNZE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the porous structures used in the current artificial joint replacement prosthesis are single-pore materials, and the reports on the selection of multi-level porous materials are very limited.
This may be mainly due to the fact that the existing porous materials themselves have a significant decrease in structural mechanical strength with the increase of porosity, so the porosity is generally low and the permeability is low, which is not conducive to the efficient exchange of substances in human tissues. Poor biocompatibility, heavy self-weight, poor postoperative human body feeling, and uneven distribution of voids lead to uneven distribution of mechanical strength, elastic modulus, etc., resulting in defects such as quality hazards
For example, CN201210185031 discloses a preparation method of a bionic artificial bone with a multi-level (micron/nanometer) pore structure, but the three-dimensional multi-level pore structure obtained by this method still ca

Method used

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  • Hip joint replacement prosthesis
  • Hip joint replacement prosthesis
  • Hip joint replacement prosthesis

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] As attached Figure 1-2 As shown, a hip replacement prosthesis includes a femoral stem 1, a femoral neck 2 and a fastening rod 3; the lower part of the femoral neck 2 is in the shape of a positive cylinder as a whole, and the upper part is set as an offset inclined column; The lower end of the neck 2 is composed of two parts, one of which is an elastic barb 4 and the other is a columnar body 5. There is a gap 6 between the elastic barb 4 and the columnar body 5; in the head of the femoral stem 1 An L-shaped through hole 7 is provided, and the upper end of the head of the femoral stem 1 is additionally provided with a positioning hole 8; the lower part of the femoral neck 2 is inserted into the L-shaped through hole 7, and the elastic barb 4 is hooked in the L-shaped through hole 7 is in the transverse hole 9; the middle part of the femoral stem 1 is additionally provided with a hole 10, which has an interference fit with a fastening plunger 3; the lower ...

Example Embodiment

[0039] Example 2

[0040] As attached image 3 As shown, a hip replacement prosthesis includes a femoral stem 1 and a femoral neck 2; the lower part of the femoral neck 2 is in the shape of a positive cylinder as a whole, and the upper part is set as an offset inclined column; the lower end of the femoral neck 2 is formed by It consists of two parts, one of which is an elastic barb 4, the other is a columnar body 5, and there is a gap 6 between the elastic barb 4 and the columnar body 5; an L-shaped through hole is provided in the head of the femoral stem 1 7, and the upper end of the head of the femoral stem 1 is additionally provided with a positioning hole 8; the lower part of the femoral neck 2 is inserted into the L-shaped through hole 7, and the elastic barb 4 is hooked to the transverse hole 9 on the L-shaped through hole 7. In; the lower surface of the femoral stem 1 is attached with a protruding rib 11 made of a multi-level hole material, the protruding ribs 11 are two e...

Example Embodiment

[0050] Example 3

[0051] As attached Figure 4 As shown, a hip replacement prosthesis includes a femoral stem 1 and a femoral neck 2; the lower part of the femoral neck 2 is in the shape of a positive cylinder as a whole, and the upper part is set as an offset inclined column; the lower end of the femoral neck 2 is formed by It consists of two parts, one of which is an elastic barb 4, the other is a columnar body 5, and there is a gap 6 between the elastic barb 4 and the columnar body 5; an L-shaped through hole is provided in the head of the femoral stem 1 7; The lower part of the femoral neck 2 is inserted into the L-shaped through hole 7, and the elastic barb 4 is hooked in the transverse hole 9 on the L-shaped through hole 7; the lower surface of the femoral stem 1 is attached with a multi-level hole The ribs 11 are made of materials, and the ribs 11 are four evenly distributed along the axial direction of the femoral stem 1. The multi-porous material used in the production ...

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Abstract

The invention relates to a hip joint replacement prosthesis. The hip joint replacement prosthesis comprises a femoral stem (1) and a femoral neck (2). The hip joint replacement prosthesis is characterized in that the tail end of the lower part of the femoral neck (2) is formed by two parts, one part is an elastic barb (4) and the other part is a cylindrical object (5), and an interval gap (6) is arranged between the elastic barb (4) and the cylindrical object (5). The head of the femoral stem (1) is internally provided with an L-shaped hole (7). The lower part of the femoral neck (2) is plugged in the L-shaped hole (7), and the elastic barb (4) is hooked and clamped in a horizontal hole (9) of the L-shaped hole (7). The surface of the lower part of the femoral stem (1) is attached with raised edges (11) made of a hierarchical porous material. The hip joint replacement prosthesis is reasonable in structure design, and has relatively high connection stability and biocompatibility after being implanted.

Description

technical field [0001] The invention relates to human body joint replacement, in particular to a hip joint replacement prosthesis. Background technique [0002] At present, most of the existing hip replacement prostheses are designed in one piece. Although this structure has the advantages of easy processing and installation, but due to factors such as uneven force during application, if some parts of it break, such as the neck Breakage and other situations will cause the overall function of its structure to fail, which undoubtedly causes huge waste. In addition, the existing hip joint replacement prosthesis also has low stability of connection with human tissue in the early stage of implantation, and it is easy to loosen and fall off; the biocompatibility is poor, and it is easy to repel with human tissue in the later stage of implantation, and the service life Shorter and other common problems, these problems cannot be fully realized by simply relying on optimal structura...

Claims

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Application Information

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IPC IPC(8): A61F2/32A61L27/04A61L27/06A61L27/56A61F2/36
CPCA61F2/32A61F2/3609A61F2/3662A61F2002/2832A61F2002/30011A61F2002/3006A61F2002/30224A61F2002/30331A61F2002/30433A61F2002/30467A61F2002/30878A61F2002/30879A61F2002/3208A61F2002/3631A61F2310/00023A61F2310/00131A61L27/047A61L27/06A61L27/56A61L2430/24
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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