Artificial vertebral body

A vertebral body and artificial technology, applied in prosthetics, medical science, spinal implants, etc., can solve problems such as difficulty in providing fusion, high recurrence rate of in situ tumors, poor long-term effect, etc., to improve adhesion, Improvement effect, effect of increasing space

Inactive Publication Date: 2013-06-19
XIAN REJE BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, clinically, for patients with cervical, thoracic or lumbar vertebral joints (or most of the vertebral body) defects caused by lesions or trauma, including vertebral joints surgically resected due to lesions, the traditional surgery is to take autologous ilium grafts, or take autologous bone The iliac bone transplantation is supplemented by steel plate at the same time, but this treatment not only increases the pain of the patient, but also easily loses the height of the vertebral joints
The normal pressure artificial vertebral body can restore the normal height of the diseased vertebral body, and is beneficial to the fusion and stability of the vertebral segment in the later stage; the existing artificial vertebral bodies are mostly made of metal materials such as titanium alloy, and the common feature of metal materials is their elasticity. The modulus is much larger than that of the vertebral bone, and the interface between the bone and the vertebral body is likely to generate greater stress. The biocompatibility is not ideal, it is difficult to provide good fusion, the long-term effect is poor, and the recurrence rate of in situ tumors is high; currently there are few Many artificial vertebral bodies made of biomaterials still use the traditional artificial vertebral body structure, so they cannot provide enough bone-forming space for the artificial vertebral body to be biocompatible with human bone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like Figure 1 to Figure 3 As shown, the artificial vertebral body is made of hydroxyapatite and zirconia bioceramic composite material, the artificial vertebral body 1 is a hollow columnar structure, its cross-section is a square with rounded corners of the central circle 4, and its area And the shape is similar to the corresponding vertebral body of the human body. The tooth-shaped protrusion strips 3 are formed on the upper and lower end surfaces of the artificial vertebral body 1, and the tooth-shaped protrusion strips 3 can ensure sufficient adhesion between the vertebral body and the cortical bone. On the four faces of the artificial vertebral body 1, there are respectively rectangular through holes 2, and the rectangular through holes 2 on the four faces form a radial cross-shaped through cavity 6, which greatly increases the Bone space, improve the effect of bone fusion.

Embodiment 2

[0024] like Figure 4 As shown, the artificial vertebral body is made of hydroxyapatite and zirconia bioceramic composite material, the artificial vertebral body 1 is a hollow columnar structure, its cross section is a square with rounded corners of the central circle 4, and its area And the shape is similar to the corresponding vertebral body of the human body. The tooth-shaped protrusion strips 3 are formed on the upper and lower end surfaces of the artificial vertebral body, and the tooth-shaped protrusion strips can ensure sufficient adhesion between the vertebral body and the cortical bone. On the four faces of the artificial vertebral body 1, there are respectively rectangular through holes 2, and the rectangular through holes 2 on the four faces form a radial cross-shaped through cavity 6, each of the cross-shaped through cavity 6 The center of one side is also provided with a reinforcing tibia 5, and the cross-shaped cavity 6 greatly increases the space for osteogenes...

Embodiment 3

[0026] Artificial vertebral body 1 is made of hydroxyapatite and zirconia bioceramic composite material, and described artificial vertebral body 1 is hollow columnar structure, and its cross section is circular, and its area and shape are similar to the corresponding vertebral body of human body. The tooth-shaped protrusion strips 3 are formed on the upper and lower end surfaces of the artificial vertebral body 1, and the tooth-shaped protrusion strips 3 can ensure sufficient adhesion between the vertebral body and the cortical bone. On the outer peripheral surface of the artificial vertebral body 1, there are four evenly distributed rectangular through holes 2 with rounded corners. These four rectangular through holes 2 form a radial cross-shaped through cavity 6, which greatly increases the Increased bone formation space, improve the effect of bone fusion.

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Abstract

The invention relates to the field of medical instruments and apparatus, in particular to an artificial vertebral body which can be used as a repairing and replacing structure between vertebral bodies. The artificial vertebral body is made of hydroxyapatite or zirconium dioxide biological ceramics composite materials and is in a hollow-cylinder-shaped structure, and a radial cross-shaped through cavity is formed in the periphery outside the artificial vertebral body. The artificial vertebral body is simple and reasonable in structure, capable of forming biological fusion with a normal vertebra, strong in adhesion, and meanwhile capable of improving comprehensive treatment effect.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an artificial vertebral body which can be used as a replacement structure for intervertebral body repair. Background technique [0002] At present, clinically, for patients with cervical, thoracic or lumbar vertebral joints (or most of the vertebral body) defects caused by lesions or trauma, including vertebral joints surgically resected due to lesions, the traditional surgery is to take autologous ilium grafts, or take autologous bone The iliac bone transplantation is supplemented by a steel plate at the same time, but this treatment not only increases the pain of the patient, but also easily loses the height of the vertebral joints. The normal pressure artificial vertebral body can restore the normal height of the diseased vertebral body, and is beneficial to the fusion and stability of the vertebral segment in the later stage; the existing artificial vertebral bodies are mostly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44A61L27/40A61L27/12A61L27/10
CPCA61F2/44A61F2002/30001
Inventor 孙叶芳
Owner XIAN REJE BIOLOGICAL TECH
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