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Cervical vertebra interbody fusion cage and manufacturing method thereof

A technology of intervertebral fusion device and fusion device, which is applied in the field of intervertebral fusion device, so as to avoid secondary surgical removal and reduce discomfort

Active Publication Date: 2015-03-25
杨述华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a cervical vertebra integratedly formed of medical degradable materials, aiming at the problem that the existing cervical intervertebral fusion uses a separate titanium plate or stainless steel plate to block the fusion at the front end and has the above-mentioned defects. Intervertebral fusion device and preparation method thereof

Method used

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  • Cervical vertebra interbody fusion cage and manufacturing method thereof
  • Cervical vertebra interbody fusion cage and manufacturing method thereof
  • Cervical vertebra interbody fusion cage and manufacturing method thereof

Examples

Experimental program
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Embodiment 1

[0067] This embodiment is used to prepare a cervical intervertebral fusion device made of PLA material. Among them, the fuser body 1 is made of pure L-lactic acid (PLLA, with a molecular weight of 800,000) material; the size of the fuser body 1 is 14.0 mm in length, 12.5 mm in width, 7.0 mm in height at the front end, and 6.0 mm in height at the rear end; The upper and lower end surfaces of the fusion device main body 1 have a tooth-like structure with a depth of 0.35 mm and a spacing of 2.0 mm; the left and right sides of the fusion device main body 1 are centered near the rear and have a cylindrical vertical through hole 12 with a diameter of 4.6 mm. The center of the vertical through hole 12 reaches The distance between the rear end surface of the fuser main body 1 is 6.3mm. After testing, the axial compressive strength of the cage body 1 of this embodiment is 110.6 MPa.

[0068] The anterior cervical fixation plate 2 is made of pure racemic polylactic acid (PDLLA, with a ...

Embodiment 2

[0071] This embodiment is used to prepare the cervical intervertebral fusion device of PLA / PCL composite material. Among them, fusion device main body 1 is made of pure PCL (molecular weight: 150,000) material; fusion device main body 1 is 15.0 mm long, 12.0 mm wide, front end height is 8.0 mm, rear end height is 7.0 mm; fusion device main body 1 The upper and lower end surfaces of the fusion device have a tooth-like structure with a depth of 0.5 mm and a spacing of 2.0 mm; the left and right sides of the fusion device body 1 are centered near the back and have a square vertical through hole 12 with a side length of 5.5 mm, and the center of the vertical through hole 12 reaches the fusion device body 1 The distance of the rear end face is 7.0mm. After testing, the axial compressive strength of the cage body 1 of this embodiment is 121.5 MPa.

[0072] The anterior cervical fixation plate 2 is made of pure left-handed polylactic acid (PLLA, with a molecular weight of 200,000); ...

Embodiment 3

[0075] This embodiment is used to prepare the cervical intervertebral fusion device common to the PLGA / β-TCP composite material and the PCL / β-TCP composite material. Among them, the fuser main body 1 is made of PCL / β-TCP composite material (PCL molecular weight is 176,000, β-TCP particle size distribution is 12.0±2.0 μm), PCL / β-TCP=6 / 4(w / w) ; The size of fusion device main body 1 is 16.0 mm in length, 14.0 mm in width, 9.0 mm in height at the front end, and 7.5 mm in height at the rear end; the upper and lower end surfaces of the fusion device body 1 have tooth-like structures with a depth of 0.6 mm and a spacing of 2.2 mm ; There is a cylindrical vertical through hole 12 with a diameter of 6.0 mm in the left and right of the fusion device body 1 near the back, and the distance from the center of the vertical through hole 12 to the rear end surface of the fusion device body 1 is 8.0 mm. After testing, the axial compressive strength of the cage body 1 of this embodiment is 137....

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Abstract

The invention relates to a cervical vertebra interbody fusion cage and a manufacturing method thereof. The cervical vertebra interbody fusion cage comprises a fusion cage body and an anterior cervical approach fixing plate, wherein the fusion cage body and the anterior cervical approach fixing plate are made of a medical degradable material, the fusion cage body is in the shape of a wedge which becomes lower from front to back, the anterior cervical approach fixing plate is located at the front end of the fusion cage body in an integrated mode, and fixing holes for fixation of the cervical vertebra are formed in the upper end and lower end of the anterior cervical approach fixing plate respectively. By designing the integrally formed anterior cervical approach fixing plate and fusion cage body, the whole cervical vertebra interbody fusion cage can be fixed to the upper centrum and lower centrum and prevented from sliding forwards to disengage or backwards to press the central nervous system. Due to the fact that both the anterior cervical approach fixing plate and the fusion cage body are made of the medical degradable material, automatic degradation can be achieved after an operation, the discomfortableness of a patient is relieved effectively, and another operation for removal is avoided.

Description

technical field [0001] The invention relates to intervertebral fusion device technology, in particular to a cervical intervertebral fusion device and a preparation method thereof. Background technique [0002] Interbody fusion cage, also often referred to as spine cage, is a medical device commonly used in clinical intervertebral bone graft fusion surgery. It is mostly used in total intervertebral disc replacement. After the necrotic intervertebral disc, inserting an intervertebral fusion device equipped with autologous bone or other bone grafting materials can effectively immediately stabilize, expand and maintain the height of the intervertebral space, and promote the fusion of adjacent segments of the vertebral body. [0003] Currently, intervertebral fusion devices in clinical use are mainly made of materials such as titanium alloy, stainless steel, polyether ether ketone, carbon fiber, and allogeneic bone. However, these materials cannot be degraded and absorbed in the...

Claims

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Application Information

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IPC IPC(8): A61F2/44A61B17/70
Inventor 杨闻杨述华叶树楠田洪涛崔福斋仇志烨张自强
Owner 杨述华
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