Hip-joint prosthesis upper-end structure capable of replacing small tuberosity part

Abstract

The invention relates to a hip-joint prosthesis upper-end structure capable of replacing a small tuberosity part. The hip-joint prosthesis upper-end structure comprises: a femoral stem, which is usedfor being connected with a femoral head, namely being connected with an acetabular cup and a femur, so the femur can rotate on the basis of the acetabular cup; a medullary needle connecting stem, which is used for being connected with a medullary needle inserted into the femur to connect the femur with an acetabular prosthesis; and a small tuberosity structure, wherein the upper part and the lowerpart of the small tuberosity structure are fixedly connected with the femoral stem and the medullary needle connecting stem respectively; the medullary needle connecting stem and the femoral stem arearranged at two sides of the small tuberosity structure respectively; the small tuberosity structure is in a polyhedron shape with the side wall being vertical or extending towards an upper middle position; and the bottom surface, located at one side of the parting position of the medullary needle connecting stem and the small tuberosity structure, of the small tuberosity structure is horizontal,so a planar end surface structure is formed. The hip-joint prosthesis upper-end structure provided by the invention has an anti-sinking effect.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an upper end structure of a hip joint prosthesis replacing the trochanter part. Background technique [0002] see figure 1 , the modular prosthesis in the prior art includes an upper end handle 11 used to connect with the femoral head, an upper end prosthesis structure 1 fixed on one end of the upper end handle 11, and an upper end prosthesis structure 1 fixed on The lower end handle body 12 and the medullary pin 13 for inserting into the lower end handle body 12 and inside the femur, and the upper end handle body 11 is used for connecting the femoral head 14 in the acetabular groove 15 . [0003] In hip joint prosthesis revision surgery, the patient’s femoral trochanter will be missing a large number of cases. At this time, the conical upper end prosthesis structure in the prior art cannot completely supplement the missing femoral trochanter. The prosthesis cannot bett...

AI Technical Summary

Problems solved by technology

[0003] In hip joint prosthesis revision surgery, the patient’s femoral trochanter will be missing a large number of cases. At this time, the conical upper end prosthesis structure in the prior art cannot completely supplement the missing femoral trochanter. The prosthesis cannot better reproduce the state of the human hip joint

At the same time, the prosthesis structure at the upper end of the cone cannot achieve the anti-sinking effect. After the hip joint prosthesis is implanted, the prosthesis will sink, which will lead to the dysfunction of the hip joint in the later stage of the patient, so that revision surgery is required

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