Acetabulum rebuilding big cup

An acetabular and large cup technology, which is applied in the field of acetabular revision large cups, can solve the problems of insufficient anteversion and abduction angles, limited bone ingrowth on the acetabular surface, and upward movement of the acetabular anatomical rotation center. Long-term stability is good and the effect of increasing bone ingrowth effect

Active Publication Date: 2021-06-22
BEIJING CHUNLIZHENGDA MEDICAL INSTR
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  • Abstract
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  • Application Information

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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

Method used

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Embodiment Construction

[0035] The following is attached Figure 1-5 The application is described in further detail.

[0036] The embodiment of the present application provides a large cup for acetabular revision, and adopts the following technical scheme:

[0037] refer to figure 1 with figure 2 , a large cup for acetabular revision, including an outer acetabular cup 100 and an inner acetabular cup 200, the inner acetabular cup 200 is fixed in the outer acetabular cup 100, the diameter of the outer acetabular cup 100 starts from 64mm, and increases by 2mm, to 76mm; the diameter of the acetabular inner cup 2002 starts from 48mm and increases by 2mm to 60mm, and different specifications of acetabular revision large cups can be selected according to actual needs.

[0038] refer to figure 2 with image 3 , in this embodiment, the side surface of the outer acetabular cup 100 and the side surface of the inner acetabular cup 200 have an anteversion angle of 400°. According to the normal physiologica...

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Abstract

The invention relates to an acetabulum rebuilding big cup which comprises an acetabulum outer cup and an acetabulum inner cup, the acetabulum inner cup is fixed in the acetabulum outer cup, the lower edge of the acetabulum outer cup is tangent to the lower edge of the acetabulum inner cup, and an abduction angle of 15-25 degrees is formed between the top end of the acetabulum outer cup and the top end of the acetabulum inner cup. A front inclination angle of 12-15 degrees is formed between the end face of the side face of the acetabulum outer cup and the end face of the side face of the acetabulum inner cup, and a net-shaped metal bone trabecula structural layer is arranged on the outer side face of the acetabulum outer cup. The big cup has the advantages that the big cup has the function of reconstructing the acetabulum anatomical rotation center, and certain help is provided for postoperative limb shortening, abduction capacity reduction, soft tissue relaxation and joint instability of a patient. The problems of collision between prostheses, increase of dislocation probability and the like caused by insufficient angle adjustment of an anteversion angle and an abduction angle in an operation due to acetabulum indentation defects are solved. The good surface metal bone trabecula structure is beneficial for improving the bone ingrowth effect, and the prosthesis implantation long-term stability is good.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to a cup for acetabular revision. Background technique [0002] Revision total hip surgery is performed after a failed primary total hip replacement and requires the removal of the initially implanted acetabular cup components before a new acetabular cup can be inserted. However, when the acetabular cup components are removed, the bone mass around the acetabulum will be lost, so the revised acetabular cup will be larger than the initial implanted acetabular cup, and the revised acetabular cup will be larger than the original acetabular cup. The size is large. [0003] In related technologies, according to the current Paprosky classification of acetabular defects, for Paprosky types I, IIA, and IIB, where the amount of bone defect is less than 50%, the use of acetabular revision acetabular cups is the current mainstream choice. However, refer to the relevant litera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/34
CPCA61F2/34A61F2002/3401A61F2002/3445A61F2002/345
Inventor 周勇刚解凤宝史春宝刘华丰郝孟娟
Owner BEIJING CHUNLIZHENGDA MEDICAL INSTR
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