Implant for fixing orthopedic prosthesis and acetabular cup prosthesis

Abstract

The invention provides an implant for fixing an orthopedic prosthesis and an acetabular cup prosthesis. The implant comprises a head end and a tail end, wherein the head end is provided with a top anda bottom, the thickness from the bottom to the top decreases progressively to enable the implant to enter a preset area, and the ratio of the maximum width to the maximum thickness of the implant isgreater than 1.155. The implant is in a thin shape on the one hand and can reduce bone defects during implantation; and on the other hand, punching holes in an acetabulum and measuring the depth of the holes are not needed, and the implant can be inserted without alignment. The operation process of fixing the acetabular cup prosthesis is simplified, and the problem of loosening of the acetabular cup prosthesis caused by inaccurate screw implantation position does not occur.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an implant for fixing an orthopedic prosthesis and an acetabular cup prosthesis. Background technique [0002] In total hip replacement, after implanting the acetabular cup prosthesis, it is necessary to fix the acetabular cup prosthesis to the acetabulum to ensure that the acetabular cup prosthesis will not loosen even if it is subjected to a large impact during movement , especially when the bone has not fully grown into the pore structure of the outer surface of the acetabular cup prosthesis, or the coefficient of friction of the outer surface of the acetabular cup prosthesis is too low, this requirement will be particularly obvious. [0003] At present, the acetabular cup prosthesis is mostly fixed by locking screws into the reserved holes on the acetabular cup prosthesis. To complete this process accurately, the screw holes corresponding to the reserved holes on the...

AI Technical Summary

Problems solved by technology

[0005] First, the process of screw implantation is very complicated, and it takes a relatively long time during the operation, and the accuracy depends too much on the experience of the chief surgeon and his assistants. Unable to accurately guide the doctor to find the position and direction of the implanted screw, often resulting in the screw not being implanted in the expected position and direction;

[0006] Second, the implantation position and direction of the screw are mainly affected by the line of sight, the position of the patient, the distribution of the reserved holes on the acetabular cup prosthesis, and the guide line engraved on the acetabular cup prosthesis, which makes it impossible for the doctor to accurately find the center of the screw circle Location

[0007] Furthermore, when the screw is implanted in an inaccurate position, the screw will loosen or even fall off, especially in the subsequent revision surgery, there will be a large bone defect at the position of the original screw hole, which will increase the risk of surgical failure

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