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Femoral stem prosthesis

A femoral stem and prosthesis technology, applied in the direction of femoral head, hip joint, joint implants, etc., can solve problems such as limited range of motion, large trochanteric fracture, unfavorable bone ingrowth, etc., to improve stability and service life , Improve the anti-rotation and increase the effect of compressive capacity

Pending Publication Date: 2019-01-25
BEIJING CHUNLIZHENGDA MEDICAL INSTR
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Problems solved by technology

However, in actual use, it will be found that after the femoral stem prosthesis 100' is implanted in the human body, the range of motion of the femoral neck 1' in the angle interval formed with the edge of the acetabulum is limited, which increases the risk of acetabular dislocation. It is also unfavorable for bone ingrowth simultaneously, causes femoral stem prosthesis 100 ' to loosen easily; The surgical level of clinical doctors i

Method used

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Embodiment Construction

[0023] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

[0024] Figures 1 to 3 The structure of a femoral stem prosthesis 100 according to the present invention is shown. Such as figure 1 As shown, the femoral stem prosthesis 100 includes a femoral neck 1 connected in turn and a flat femoral stem, and the femoral stem includes a proximal femoral segment 21 connected to the femoral neck 1 and a distal femoral segment connected to the proximal femoral segment 21 22. The proximal femoral segment 21 includes a first inner side 211 close to the inner side of the human femur and a first outer side 212 opposite to the first inner side 211 . Wherein, the first inner side su...

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Abstract

The invention relates to the field of medical devices and discloses a femoral stem prosthesis. The femoral stem prosthesis comprises a femoral neck and a flat femoral stem connected in turn, the femoral stem comprising a proximal femur segment connected to the femoral neck and a distal femur segment connected to the proximal femur segment, the proximal femur segment comprising a first medial surface close to the medial side of the human femur and a first lateral surface opposite to the first medial surface. The first inner side surface is configured as an arc-shaped surface curved toward the first outer side surface, the arc-shaped surface being formed with a plurality of first pressure steps arranged in sequence along the length direction of the arc-shaped surface. The femoral stem prosthesis of the invention is more stable in fixation with the human femur, can effectively prolong the service life of the femoral stem prosthesis in the human body and alleviate the pain of the patient.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a femoral stem prosthesis. Background technique [0002] Hip joint replacement, also known as artificial hip replacement, is to fix the artificial hip joint prosthesis (including femoral stem prosthesis and acetabular prosthesis) on the normal bone by bone cement and screws to replace the diseased bone. It is a relatively mature and reliable treatment method to reconstruct the normal function of the patient's hip joint. [0003] The femoral stem prosthesis is an important prosthesis in hip replacement surgery, and its adaptability and stability to the human femur are particularly important. Such as Figure 5 As shown, the existing femoral stem prosthesis 100' usually includes a femoral neck 1', a proximal femoral end 2' and a distal femoral end 3' connected in sequence. Although the existing femoral stem prosthesis 100' has the advantages of convenient processing and short de...

Claims

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Application Information

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IPC IPC(8): A61F2/36
CPCA61F2/36
Inventor 王坤正史春宝陈立叶解凤宝李明洋
Owner BEIJING CHUNLIZHENGDA MEDICAL INSTR
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