Hip joint prosthesis

Abstract

The invention relates to a hip joint prosthesis, which comprises a femoral neck, a proximal end, a femoral stem and a distal end, wherein a longitudinal ridge is arranged on the proximal end. The activity range of the femoral neck is large, the prosthesis is stably implanted, the operation is convenient, and the rotation is effectively prevented, and thus the defects of the traditional hip joint prostheses are overcome.

Description

technical field [0001] The invention relates to a medical implant device, in particular to a hip joint prosthesis. Background technique [0002] see figure 1 As shown, the existing more advanced hip prosthesis is composed of femoral neck 1 and femoral stem. Wherein, the femoral neck 1 is cylindrical; the femoral stem adopts a cylindrical design, including a proximal end 21 and a distal end 22, the surface of the proximal end 21 is provided with micropores, and the outer side 23 of the proximal end 21 adopts a straight design. The existing hip joint prosthesis has the advantages of convenient processing and short development period, and belongs to the biologically fixed hip joint prosthesis. [0003] However, it was found in actual use that after the existing hip joint prosthesis is implanted into the human body: the hip joint prosthesis moves between the angle formed by the cylindrical femoral neck 1 and the edge of the acetabulum, and the femoral range of motion is limite...

AI Technical Summary

Problems solved by technology

[0003] However, it was found in actual use that after the existing hip joint prosthesis is implanted into the human body: the hip joint prosthesis moves between the angle formed by the cylindrical femoral neck 1 and the edge of the acetabulum, and the femoral range of motion is limited, which increases acetabular dislocation risk, and is not conducive to bone ingrowth, easy to loose; the distal end 22 cylinder of the femoral stem does not match well with the medullary cavity, which will affect the blood supply to the medullary cavity; the straight design of the proximal outer side 23 is likely to cause Large trochanteric fractures require a high level of surgery for clinical doctors; the oval design of the proximal 21 section and the distal 22 cylindrical design make the prosthesis's anti-rotation ability poor, and the short-term fixation effect is not ideal

[0004] It can be seen that the existing hip joint prosthesis obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

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