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External acetabulum cup and hip joint prosthesis including the same

An acetabular and cup technology, which is applied in the direction of hip joints, prostheses, acetabular recesses, etc., can solve the problems of small bone ingrowth area of ​​the acetabular cup, high loosening rate of the acetabular cup, and short service life. , to achieve good pressure stability, increase service life, and increase the effect of contact area

Pending Publication Date: 2019-11-08
TIANJIN ZHENGTIAN MEDICAL INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact area between the existing acetabular cup and the acetabular fossa is small, and the long-term bone ingrowth area of ​​the acetabular cup is small, resulting in a high loosening rate of the acetabular cup and a short service life

Method used

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  • External acetabulum cup and hip joint prosthesis including the same
  • External acetabulum cup and hip joint prosthesis including the same
  • External acetabulum cup and hip joint prosthesis including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] An acetabular cup such as Figure 1-4 shown, including:

[0065] A cup body 1, the cup body 1 has an outer surface 11 and an inner surface 12 connected to the outer surface 11;

[0066] The cup body 1 is provided with a center hole 6 and three installation holes 2 extending from the outer surface 11 to the inner surface 12, the center hole 6 is arranged at the center of the cup body 1, and the three installation holes 2 are arranged around the center hole 6, A gasket installation groove 21 is provided around each mounting hole 2 on the inner surface 12 of the cup body 1 to prevent the gasket 31 from slipping out of the cup body 1;

[0067] The outer surface 11 of the cup body 1 is provided with three circles of grooves 5 around the mounting hole 2; the grooves 5 in each circle are circular; the width of the groove 5 is 0.7mm; the depth of the groove 5 is 0.8mm; the groove 5 The surface is provided with a titanium slurry coating that promotes bone ingrowth, and the thi...

Embodiment 2

[0071] An acetabular outer cup, except that the cup body 1 is provided with two installation holes 2, and the outer surface 11 of the cup body 1 is provided with two rings of grooves 5 around the installation holes 2; the two rings of grooves 5 are respectively rectangular and triangular in shape; the grooves The width of the groove 5 is 0.5 mm; the depth of the groove 5 is 1.0 mm; the surface of the groove 5 is provided with a hydroxyapatite layer for promoting bone ingrowth, and the thickness is 0.3 mm; the number of the second locking member 32 is 3 Except that, the rest of the structure is the same as that of the acetabular outer cup described in Example 1.

Embodiment 3

[0073] An acetabular outer cup, except that the cup body 1 is provided with five mounting holes 2, the outer surface 11 of the cup body 1 is provided with 6 circles of grooves 5 around the mounting holes 2; the 6 circles of grooves 5 are all circular; the grooves 5 The width of the groove 5 is 1.0mm; the depth of the groove 5 is 0.5mm; the surface of the groove 5 is provided with a titanium slurry coating for promoting bone ingrowth, and the thickness is 0.8mm; the number of the second locking member 32 is 5, The rest of the structure is the same as that of the acetabular outer cup described in Embodiment 1.

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Abstract

The invention provides an external acetabulum cup and a hip joint prosthesis including the same. The external acetabulum cup includes a cup body, the cup body is provided with an external surface andan internal surface connected with the external surface, the cup body is provided with a central hole and a mounting hole which extend from the external surface to the internal surface, and the external surface of the cup body is provided with a groove around the mounting hole. The contact area of the external acetabulum cup and a fossa acetabuli is obviously increased, initial fixation and compression stability are good, long-term bone in-growth is facilitated, and the service life of the external acetabulum cup is improved.

Description

technical field [0001] The invention belongs to the technical field of surgical implants, and relates to an acetabular outer cup and a hip joint prosthesis containing the same. Background technique [0002] In surgical medical operations, artificial joint replacement is used to replace and repair damaged natural joints, so as to restore their physiological functions and relieve pain for patients. Artificial joint replacement surgery is an effective treatment method, which has become more and more widely used in recent years. However, whether the joint prosthesis implanted in the human body can be stable for a long time is the key to improving the service life and efficacy of the joint prosthesis, and it is also a subject of great concern and continuous research and discussion. [0003] The acetabular cup is part of the acetabular prosthesis. During surgery, the acetabular cup is inserted into the body. The acetabular outer cup is in contact with the cancellous bone in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/34A61F2/32
CPCA61F2/0077A61F2/32A61F2/34A61F2220/0025A61F2310/00023
Inventor 高小超王经之鲍野
Owner TIANJIN ZHENGTIAN MEDICAL INSTR CO LTD
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