Biological hollow cancellous bone screw

A cancellous bone and bio-based technology, applied in the field of medical devices, can solve the problems of aseptic necrosis of the femoral head, large shear stress, nonunion of fractures, etc., and achieve the prevention of femoral head necrosis, good economic and social benefits, The effect of promoting fracture healing

Inactive Publication Date: 2010-09-22
SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the femoral neck fracture site is often subjected to relatively large shear stress, and the blood supply characteristics of the femoral head itself mainly depend on the lateral epiphyseal artery originating from the medial circumflex femoral artery, the blood supply of the femoral head will often be impair

Method used

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  • Biological hollow cancellous bone screw
  • Biological hollow cancellous bone screw
  • Biological hollow cancellous bone screw

Examples

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the embodiments and with reference to the accompanying drawings.

[0024] see figure 1 , a biological hollow cancellous bone screw 100, comprising a screw head 110, a screw body 120 and a screw tail 130, the screw head 110, the screw body 120 and the screw tail 130 are sequentially connected, and the screw body 120 is provided with a container for storing medicine Cavity 121, the cavity 121 runs through the screw body 120 and the screw tail 130, the outer surface of the screw head 110 is provided with threads, the screw body 120 is also provided with a side hole 122, the screw tail 130 is provided with a silicon rubber plug 131, the silicon rubber The rubber plug 131 matches the shape of the mouth of the cavity 121 at the screw tail 130 and plugs the mouth of the cavity 121 .

[0025] In this specific embodiment, the inner diameter of the cavity 121 is 5 mm; the side hole 122 is an oval side hole...

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Abstract

The invention relates to a biological hollow cancellous bone screw which comprises a screw head, a screw body and a screw tail, wherein the screw head, the screw body and the screw tail are sequentially connected; a cavity for storing medicaments is arranged in the screw body; the cavity penetrates through the screw body and the screw tail; screw threads are arranged on the outer surface of the screw head; side holes are also arranged on the screw body; the screw tail is provided with a bolt; and the bolt is matched with the shape of the opening of the cavity at the screw tail and plugs the opening of the cavity. The biological hollow cancellous bone screw of the invention is used as an internal fixation device for a femoral neck and the like which can be fractured easily and can not heal easily and/or parts which can cause osteonecrosis easily, and can accelerate bone repair of fracture parts and prevent aseptic necrosis and nonunion of bones by injecting substances for promoting bone repair and regeneration into the cavity.

Description

【Technical field】 [0001] The invention relates to the field of medical devices, in particular to a biological hollow cancellous bone screw used for internal fixation of fracture sites. 【Background technique】 [0002] The internal fixation treatment of femoral neck fractures has a history of nearly a hundred years. The three-edged nail in the prior art was invented by Smith-Petersen in 1929. It belongs to the single-nail system. The talar side of the femur is implanted to fix the fracture of the femoral neck and prevent rotation. [0003] Sliding compression nails, such as dynamic hip screws (DHS), Richard nails, Pugh nails, etc., generally consist of two parts: a fixed nail and a nail plate with a sleeve. After fixation, the fixation nail can slide in the sleeve. When the fracture surface is absorbed, the nail slides sideways into the sleeve and shortens to keep the fracture end in close contact. [0004] The hollow lag cancellous bone screw produced in the 1980s is a mult...

Claims

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Application Information

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IPC IPC(8): A61B17/86A61L27/54A61L27/38A61M31/00A61K35/28A61P19/08
Inventor 干耀恺戴尅戎
Owner SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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