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Combined artificial hip joint cup

A hip joint socket and composite technology, applied in the direction of hip joint, acetabular socket, joint implants, etc., can solve the problems of non-existence and other problems, and achieve not easy deformation, reduce stress concentration, and facilitate drilling and positioning Effect

Inactive Publication Date: 2015-11-11
JIANSU OKANI MEDICAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its corrosion resistance, PEEK is an ideal composite connection material, however, there are no reports of PEEK polymer materials used in hip joint cups

Method used

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  • Combined artificial hip joint cup
  • Combined artificial hip joint cup
  • Combined artificial hip joint cup

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] Such as figure 1 As shown, a composite artificial hip joint acetabular cup provided by the present invention is in the shape of a concave semicircle, including an outer layer 1 and an inner layer 3; wherein the outer layer 1 has screw holes 2, and the outer layer 1 is made of biocompatible materials; The inner layer 3 is made of polyether ether ketone or its derivative polymer material, and the inner layer 3 and the outer layer 1 are fixed into an integral structure; the screw holes 2 are covered by the inner layer.

[0030] In the above technical solution, the biocompatible material is one...

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Abstract

The invention relates to a combined artificial hip joint cup in a concave semi-arc shape. The combined artificial hip joint cup comprises an outer layer and an inner layer; the outer layer is provided with screw holes; the outer layer is made of biocompatible material; the inner layer is made of polyetheretherketone or its derivative polymer material; the inner layer and the outer layer are integrally fixed; the screw holes are covered by the inner layer. The joint of the surface of the PEEK (polyetheretherketone) inner layer and the outer surface of a different cup liner may reduce stress concentration and reduce the risk of fretting wear and liner damage; or the inner surface of the PEEK inner layer and the outer surface of a femoral prosthesis directly form a friction pair, decreasing wear of the outer surface of the femoral prosthesis. The surface of the PEEK inner layer has the advantages of corrosion resistance and fretting wear resistance, and the release of existing metal ions and granules of metal prostheses, causing harm to the human body, is avoided.

Description

technical field [0001] The invention relates to a medical rehabilitation device, more specifically, to a composite artificial hip joint acetabular cup. Background technique [0002] Acetabular cup prosthesis is widely used in total hip arthroplasty. In the case of bone defect or poor bone quality, the current unified approach is to selectively use bone screws in the safety zone, which will increase the initial prosthesis stability and promote bone ingrowth of the prosthesis (TabataT , KakuN, HaraK, TsumuraH. Initial stability of cementless acetabular cups: press-fit and screw fixation interaction-aninvitrobiomechanical study. EurJOrthopSurgTraumatol. 2015Apr;25(3):497-502.doi:10.1007 / s00590-014-15Nub21-4.5). However, the vacant screw holes help to transport the fine-grained synovial fluid to the interface of the bone prosthesis, which can cause osteolysis, and at the same time, the synovial fluid or body fluid will impact the bone interface under the action of joint force, ...

Claims

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Application Information

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IPC IPC(8): A61F2/34A61L27/32A61L27/30A61L27/04
CPCA61F2/34A61L27/06A61L27/32
Inventor 朱健徐龙伟
Owner JIANSU OKANI MEDICAL TECH CO LTD
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