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Anti-loosening femoral stem prosthesis

A femoral stem, loose technology, applied in the direction of prosthesis, femur, femoral head, etc., can solve the problems of femoral stem prosthesis and femoral medullary cavity loosening, affecting patients' normal life, economic pressure, etc.

Pending Publication Date: 2021-01-08
北京中安泰华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the femoral stem prosthesis on the market can generally be used for 8-15 years after operation. With the increase of the service life and frequency of use, the gap between the femoral stem prosthesis and the femoral medullary cavity will be due to osteoporosis and slight femoral medullary cavity. Looseness is caused by deformation. When the degree of looseness is large, it will seriously affect the normal life of the patient. At this time, only revision surgery can be performed, but revision surgery will bring secondary pain and economic pressure to the patient.
[0004] In view of the related technologies mentioned above, the inventor believes that with the increase of the service life and the frequency of use, loosening is likely to occur between the femoral stem prosthesis and the femoral medullary cavity

Method used

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  • Anti-loosening femoral stem prosthesis

Examples

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Effect test

Embodiment 1

[0036] The embodiment of the present application discloses a loosening-proof femoral stem prosthesis. refer to figure 1 and figure 2 , the femoral stem prosthesis includes a femoral stem body 1 and a femoral neck 2; one end of the femoral stem body 1 is the proximal end of the femoral stem, the other end is the distal end of the femoral stem, and the femoral neck 2 is integrally connected to the proximal end of the femoral stem. The outer wall of the neck 2 is provided with a ring-shaped relief groove 21. The setting of the relief groove 21 enables the femoral stem prosthesis to have a greater range of motion after being assembled with the acetabular cup 3, allowing the patient to perform larger movements. The sports movement of angle has reduced the possibility that femoral stem prosthesis and liner 4 collide.

[0037] refer to image 3 , the femoral stem body 1 is provided with an inserter and two groups of movable parts 5, wherein, the inserter can be vertically inserte...

Embodiment 2

[0042] The embodiment of the present application discloses a kind of anti-loosening type femoral stem prosthesis, refer to Figure 5The difference between this embodiment and Embodiment 1 lies in the movable part. The movable part 5 includes a slide bar 51 arranged in the guide hole 11. The end of the slide bar 51 near the insert is processed with a first tapered head 52. The guide hole 11 A guide sleeve 8 communicated with it is embedded inside, and the inner wall of the guide sleeve 8 and the outer wall of the slide bar 51 are all processed with rough surfaces, so that the friction between the guide sleeve 8 and the slide bar 51 is greater than the gravity of the movable part 5, Prevent slide bar 51 from sliding freely.

[0043] One end of the slide bar 51 away from the first conical head 52 is provided with a groove 511, and a push rod 54 is slidably arranged in the groove 511, and the push rod 54 is located between one end in the groove 511 and the inner bottom wall of the...

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Abstract

The invention relates to the field of femoral stem prosthesis installation, in particular to an anti-loosening femoral stem prosthesis. The anti-loosening femoral stem prosthesis comprises a femoral stem body, a femoral neck integrally connected to the femoral stem body, a movable part movably arranged in the femoral stem body and capable of extending outwards from the side face of the femoral stem body under external force, and an inserting piece which is inserted into the femoral stem body from the end close to the femoral neck; and when the inserting piece is inserted into the femoral stembody, one end of the movable part abuts against the inserting piece, and the other end of the movable part extends out of the femoral stem body. The anti-loosening femoral stem prosthesis has the advantages that the stability of the femoral stem prosthesis and a femoral medullary cavity after installation is improved, the possibility of loosening between the femoral stem prosthesis and the femoralmedullary cavity is reduced, and the service life and and the use life are prolonged.

Description

technical field [0001] The present application relates to the field of femoral stem prosthesis installation, in particular to an anti-loosening type femoral stem prosthesis. Background technique [0002] In recent years, with the increasing aging of the world's population, the number of joint replacements is also increasing. Artificial joint replacement surgery has gradually become an effective method commonly used in the medical field to treat joint disabling diseases. The fixation effect between the femoral stem prosthesis and the human natural femur is the key to determine the service life and curative effect of the artificial joint. [0003] At present, the femoral stem prosthesis on the market can generally be used for 8-15 years after operation. With the increase of the service life and frequency of use, the gap between the femoral stem prosthesis and the femoral medullary cavity will be due to osteoporosis and slight femoral medullary cavity. Looseness is caused by d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/28A61F2/36
CPCA61F2/28A61F2/36A61F2/3609A61F2/3662A61F2002/2825A61F2002/2832A61F2002/30405A61F2002/30891
Inventor 张东兴蒋鹏陈立叶周中位黄馨
Owner 北京中安泰华科技有限公司
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