Total acetabulum prosthesis

Abstract

The invention relates to the field of medical apparatus and instruments and discloses a total acetabulum prosthesis. The total acetabulum prosthesis comprises a metal outer cup in a half oblate spheroid shape and a lining which is arranged in the metal outer cup in a sleeving mode, grooves are formed in the inner periphery surface of the metal outer cup, elastic protrusions matched with the grooves are formed on the outer periphery surface of the lining, and the elastic protrusions on the lining can be embedded in the grooves under the effect of external force so that the lining can be prevented from moving relative to the metal outer cup. The total acetabulum prosthesis can be mounted more conveniently by an operation and implanted more stably, and a second revision surgery of total acetabulum prosthesis implantation can be effectively avoided.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a total acetabular prosthesis. Background technique [0002] A total acetabular prosthesis is a surgical implant used to replace the acetabulum portion of the human hip joint. It is used in combination with femoral stem and ball head for hip total hip replacement surgery. The structure of the existing total acetabular prosthesis is composed of a metal outer cup and an inner liner through a taper connection, which has the advantages of convenient processing and short development cycle. [0003] However, in the actual use of the existing total acetabular prosthesis, there are still many shortcomings in its structure. For example, the existing total acetabular prosthesis is difficult to install during the operation. Specifically, the metal outer cup and the inner liner of the existing total acetabular It takes a lot of force to drive the inner liner into place, which can easily...

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Problems solved by technology

[0003] However, in the actual use of the existing total acetabular prosthesis, there are still many shortcomings in its structure

For example, the existing total acetabular prosthesis is difficult to install during the operation. Specifically, the metal outer cup and the inner liner of the existing total acetabular It takes a lot of force to drive the inner liner into place, which can easily cause the metal outer cup that has been installed in place to loosen due to excessive force, which eventually leads to revision surgery on the total acetabular prosthesis; For example, the existing total acetabular prosthesis is easy to dislocate the acetabulum during use, and the amount of wear is relatively large. Specifically, because there is no certain gap between the metal outer cup and the inner liner Anti-retraction structure, so during long-term exercise in the human body, the inner lining can easily come out of the metal outer cup, causing acetabular dislocation. At the same time, because the inner li

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