An acetabular revision cup

Abstract

The present application relates to an acetabular revision large cup, comprising an acetabular outer cup and an acetabular inner cup, the acetabular inner cup is fixed in the acetabular outer cup, and the lower edges of the acetabular outer cup and the acetabular inner cup are Tangent, there is an abduction angle of 15-25° between the acetabular outer cup and the top of the acetabular inner cup, and the lateral end face of the acetabular outer cup and the lateral end face of the acetabular inner cup have a 12-15° Anterior inclination angle, the outer surface of the acetabular cup is provided with a mesh metal trabecular bone structure layer. The beneficial effects of the present application are as follows: it has the function of reconstructing the anatomical rotation center of the acetabulum, and it is helpful for patients with postoperative limb shortening, reduced abduction ability, soft tissue relaxation and joint instability, so as to make up for the surgery caused by the defect of the acetabulum. Insufficient adjustment of the anteversion angle and abduction angle can lead to problems such as the increase in the probability of impingement and dislocation between the prostheses. The good surface metal trabecular structure helps to increase the effect of bone ingrowth, and the long-term stability of prosthesis implantation is good.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to an acetabular revision cup. Background technique [0002] Total hip revision surgery is performed after a failed primary total hip replacement and requires the removal of the initially implanted acetabular cup component before a new acetabular cup can be implanted. However, when the acetabular cup component is removed, it will cause the loss of bone around the acetabulum, so the revised acetabular cup is larger than the initial implanted acetabular cup, and then the revised acetabular cup is larger than the original acetabular cup. Large size. [0003] In the related art, according to the current Paprosky classification of acetabular defects, for Paprosky types I, IIA, IIB, and the amount of bone defect is less than 50%, the use of acetabular revision acetabular cup is the current mainstream choice. However, refer to the relevant literature ( DoJumbo Cups Caus...

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Problems solved by technology

[0007] In order to improve the phenomenon that the acetabular anatomical center of rotation moves up, the anteversion angle and abduction angle are insufficient, and the bone ingrowth effect of the acetabular surface is limited in the clinical use of the existing acetabular revision cup, the application provides an acetabular cup Renovate Mug

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