Rolling type bipolar head

A pole head and ball head technology, applied in the field of total hip replacement, can solve the problems of ceramic materials such as fragility, poor effect, and high price, and achieve the effect of long service life, easy manufacture, and simple structure

Inactive Publication Date: 2014-07-02
BEIJING AKEC MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some companies use materials such as ceramic ball heads, ceramic linings, and ultra-high molecular weight polyethylene high-crosslinking linings, the effect is not very good because of the high price, the fragile ceramic materials, and the polyethylene material is easy to cause osteolysis.

Method used

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  • Rolling type bipolar head

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Embodiment Construction

[0015] Such as figure 1 As shown, a rolling bipolar head is composed of a metal acetabular cup 1, a ball 2, a ball head 3, and a snap ring 4 along the cup. The metal acetabular cup 1 is a hollow hemisphere, the outer spherical surface is polished, the inner spherical surface is polished, and the outer edge of the inner ball has a snap ring groove 5 . The ball head 3 is a sphere with a conical blind hole in the sphere. The cup edge snap ring 4 is a hollow annular structure with locking teeth on one side. The inner spherical surface of the metal acetabular cup 1 is covered with balls 2, and the ball head 3 rolls on the inner spherical surface of the metal acetabular cup 1 through the balls 2. The snap ring groove 5 on the outside of the inner ball of the metal acetabular cup 1 is blocked by the teeth of the cup edge snap ring 4 to prevent the ball 2 from coming out. The ball 2 at the super-radius position in the inner spherical surface of the metal acetabular cup 1 seals the ...

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Abstract

The invention discloses a rolling type bipolar head. The rolling type bipolar head comprises a metal acetabulum cup, balls, a bulb and a cup edge clamping ring, wherein the outer spherical surface of the bulb is matched with the inner spherical surface of the metal acetabulum cup through the balls, the cup edge clamping ring is installed at the edge of the metal acetabulum cup to prevent the balls from falling out, and the bulb is connected with the thighbone stem awl in a matched mode. The components can be applied to an artificial hip joint prosthesis replacement operation after being combined into a whole. Compared with a common artificial hip joint prosthesis, the rolling type bipolar head is most characterized by adopting a rolling type artificial hip joint spherical surface to replace a common sliding friction type artificial hip joint spherical surface. After the rolling type bipolar head is implanted into the human body, little abrasion is generated, friction chips generated by the common sliding friction type artificial hip joint spherical surface are avoided, and osteolysis caused by the friction chips is also avoided. The rolling type bipolar head guarantees that the joint spherical surface moves flexibly and is longer in service life to the maximum extent, and a patient can better recover the normal hip joint motion function of the human body by means of the rolling type bipolar head.

Description

technical field [0001] The invention relates to a rolling type bipolar head, which is applied to total hip replacement in artificial hip joint replacement with surgical implants. Background technique [0002] Surgical Implants Prosthetic hip prostheses - bipolar heads have been around for quite some time. In total hip replacement, the lifespan of the artificial hip joint prosthesis-bipolar head is generally 3-10 years, after which the hip joint prosthesis revision must be performed. The reason why the artificial hip joint prosthesis-bipolar head is not long life is mainly that the spherical surface of the artificial joint will be severely worn during activities, and eventually the spherical surface of the joint will be deformed and lose its function. The secondary reason is that the debris produced by the wear of the spherical surface of the artificial joint will cause osteolysis, which will induce the loosening and dislocation of the artificial hip joint prosthesis after i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32
CPCA61F2/32A61F2002/30001
Inventor 马欣
Owner BEIJING AKEC MEDICAL
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