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Inner supporting frame for femoral head

A support frame and femoral head technology, applied in the field of human implants, can solve problems such as low strength and insufficient short-term support force, and achieve the effect of preventing occurrence and development, facilitating repair and reconstruction, and good results

Inactive Publication Date: 2011-04-27
北京畅想天行医疗技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the strength is low and the short-term support is not enough

Method used

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  • Inner supporting frame for femoral head
  • Inner supporting frame for femoral head
  • Inner supporting frame for femoral head

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] An implantable polyether ether ketone material close to the elastic modulus of the bone is selected to make the main part of the femoral head inner support frame of the present invention. The main part of the femoral head inner support frame of the present invention is a cylindrical hollow structure, which is divided into three parts: a head 2 , a body 1 and a tail 3 . The three parts of the head 2, the body 1 and the tail 3 are connected front and back on the same axis. Wherein, the body part 1 of the support frame is a circular tube body, and the front end thereof is the head part 2 of the support frame. The head 2 is a hemispherical shell with a closed lumen 6. The hemispherical diameter of the head 2 is the same as that of the body 1 tube, which is 5-20mm, usually 10mm. The thickness of the tube wall of the body and the head of the support ...

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Abstract

The invention relates to an inner supporting frame for a femoral head. A main body of the inner supporting frame is a hollow cylinder, a body part of the inner supporting frame is a round tube body, and a front end is connected with a hemispherical head; a tube wall of the tail part of the inner supporting frame is thickened compared with the body part and is provided with an external screw thread, and a back end face of the tail part is a plane and is provided with a straight line slot or a cruciform slot; lateral through holes are arranged on a spherical wall of the head of the inner supporting frame and the side walls of the body part and the tail part; and an artificial osteoinduction material is filled in a hollow cavity from the head to the tail part of the supporting frame. When the inner supporting frame for the femoral head is applied, the stress shielding and the dissolving of some metallic elements caused by big elastic modulus are avoided, therefore, the sufficient overall strength is not only provided, but also the bone tissue growth condition for transferring ossification and inducing ossification is reinforced.

Description

technical field [0001] The invention relates to a human body implant, in particular to a support frame implanted in a femoral head for treating necrosis of the femoral head. Background technique [0002] The common treatment method for femoral head necrosis is core decompression. In order to prevent the bone defect left after core decompression and the weakness of the femoral neck from accelerating the collapse of the femoral head, people use internal supports to provide support. Common support materials are: [0003] 1. Metal solid or hollow rods, such as titanium and titanium alloy rods, tantalum rods, cobalt-chromium alloy rods, stainless steel rods, etc. The advantage of the metal support is that it has a large support force and is permanently implanted at one time. However, its elastic modulus is many times larger than that of bone. For example, the elastic modulus of titanium is nearly 114GPa, while the elastic modulus of bone is only 10-30GPa. When dynamic force is ...

Claims

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Application Information

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IPC IPC(8): A61F2/36A61L27/18
Inventor 沈龙吴春生邱芹尹晓宇
Owner 北京畅想天行医疗技术有限公司
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