Acetabular cup prosthesis

An acetabular cup and prosthesis technology, applied in the field of acetabular cup prosthesis, can solve the problem of difficulty in ensuring the minimum thickness of the bearing part, and achieve the effects of ensuring thickness, ensuring strength and wear resistance, and securing firmness

Active Publication Date: 2022-06-17
BEIJING NATON INST OF MEDICAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to minimize the amount of osteotomy of the patient during the operation, the implanted acetabular cup prosthesis should not be too large. Therefore, the polyethylene lining should not be too thick, and it is necessary to redesign the inner lining with limited thickness. The locking structure makes it difficult to guarantee the minimum thickness of the bearing part

Method used

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  • Acetabular cup prosthesis
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Embodiment Construction

[0030] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0031] The present invention provides an acetabular cup prosthesis, such as Figure 1-3 shown, including outer cup 1 and inner liner 2, where:

[0032] The inner surface of the outer cup 1 is provided with an abutting surface 11 along the circumferential direction, and the abutting surface 11 can be realized in the following ways:

[0033] method one:

[0034] like figure 1 As shown, the inner surface of the outer cup 1 is provided with an annular groove 12 with a triangular longitudinal section along the circumferential direction.

[0035] Method two:

[0036] The inner surface of the outer cup is provided with an annular protrusion (not shown) along the circumferential direction, and a side wall of the annular protrusion away from t...

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PUM

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Abstract

The invention discloses an acetabular cup prosthesis, which belongs to the technical field of medical prosthesis. The acetabular cup prosthesis includes an outer cup and an inner liner, and the inner surface of the outer cup is provided with an abutment surface along the circumferential direction; The outer surface of the liner is provided with a raised snap ring at the bearing part, and an elastic locking tongue is arranged at the non-bearing part; both the raised snap ring and the elastic locking tongue are against the abutment surface to secure The inner liner is self-locking within the outer cup. The acetabular cup prosthesis of the present invention can ensure the thickness of the inner liner to the greatest extent, and reduce the osteotomy amount of the patient as much as possible, and is easy to install, difficult to come out, and firmly fixed.

Description

technical field [0001] The present invention relates to the technical field of medical prostheses, in particular to an acetabular cup prosthesis used for hip joint replacement. Background technique [0002] The acetabular cup prosthesis is one of the most widely used prostheses in hip replacement, and its structure is generally composed of a metal outer cup and a polyethylene lining. During the operation, the metal outer cup is inserted into the human acetabulum first, and then the polyethylene lining is installed into the metal outer cup. On the one hand, it is necessary for doctors to easily insert the polyethylene lining into the metal outer cup during the operation. The inner lining is tightly fitted in the metal outer cup, and the fixing is stable, and there is no loosening or falling out. Therefore, the assembly of the inner lining in the outer cup should achieve three main functions: easy to load, not easy to come out, and firm to fix. [0003] Since the outer cup ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/34A61F2/30
CPCA61F2/34A61F2/30749A61F2002/3241
Inventor 胡肖强董骧
Owner BEIJING NATON INST OF MEDICAL TECH CO LTD
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