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Intervertebral implant

An implant and intervertebral technology, applied in the field of medical implants, can solve problems such as high dissolution rate, difficult bioabsorption, and insufficient micro/nano-scale pores

Active Publication Date: 2015-06-17
METAL INDS RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after magnesium is removed at high temperature, only the porous HA remains, which also has the problem of poor mechanical strength.
[0008] Furthermore, conventional high-temperature (usually >1000°C) sintered porous hydroxyapatite (HA) materials do not have sufficient micro / nano-scale pores and are difficult to be absorbed by organisms.
On the other hand, biodegradable polymers conventionally used for scaffolds have the disadvantages of relatively low strength and too high dissolution rate

Method used

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Embodiment Construction

[0026] see figure 1 , an intervertebral implant provided by the present invention, which is composed of metal powder and degradable biomaterial; wherein, the degradable biomaterial has a plurality of communicating holes after sintering, and the metal powder is filled in The plurality of communicating holes are sintered to interfit with the degradable biomaterial. In this way, the degradable biomaterial contained in the intervertebral implant can dissolve through body fluids and cell-mediated biodegradation, part of which participates in the local or remote bone tissue reconstruction of bone tissue implantation, and the other part is gradually excreted by the metabolic system In vitro, the defect site is finally completely replaced by new bone tissue, and the metal scaffold also acts as a permanent scaffold, that is, bone tissue engineering scaffold material. Based on this, the degradable biological material can also be replaced by absorbable biological material, so as to achi...

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Abstract

The invention relates to an intervertebral implant, especially to an intervertebral implant that utilizes porous hydroxyapatite as the scaffold model filled with metal powder and undergoes sintering shaping to compose a locally degradable hydroxyapatite / metal bulk. The hydroxyapatit structure degrades gradually along with the time of implantation into the human body, and bone tissues guided to attach to the inside of porous metals so as to form a steady upper bone and lower bone fusion effect.

Description

technical field [0001] The invention relates to the technical field of medical implants, in particular to a partially degradable and porous intervertebral implant, which is used to form partially degradable hydroxyl apatite and metal mixed blocks material, so as to guide bone regeneration and form the effect of stabilizing the fusion of upper and lower bones. Background technique [0002] Press, lumbar interbody fusion, which means removing the intervertebral disc from two vertebrae and then fusing the two together. This procedure is also known as "spinal fusion". It is usually used to treat patients with persistent back pain, sciatica or weakness of legs caused by spinal diseases such as degenerative spondylosis and herniated disc. Spinal fusion is also an important part of the surgery to correct spinal deformities such as scoliosis, spondylolisthesis or spinal trauma. [0003] It would be of great practical benefit if implants for bone repair (or implants for bone repai...

Claims

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Application Information

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IPC IPC(8): A61L31/02A61L31/14
Inventor 王鍏晴吴孟修王福山苏子可陈维德施威任
Owner METAL INDS RES & DEV CENT
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