A cervical intervertebral fusion device and its preparation method

An intervertebral cage and cage technology, which are applied in the field of intervertebral cages to reduce discomfort and avoid secondary surgery for removal.

Active Publication Date: 2017-10-27
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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  • A cervical intervertebral fusion device and its preparation method
  • A cervical intervertebral fusion device and its preparation method
  • A cervical intervertebral fusion device and its preparation method

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 6.3 mm. 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 7.0 mm. 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 intervertebral fusion device and a preparation method thereof. The cervical intervertebral fusion device comprises a fusion device main body made of medical degradable materials and an anterior cervical fixation plate. The fusion device main body is high at the front and low at the rear The anterior cervical fixation plate is located at the front end of the fusion cage body and integrally formed with the fusion cage body, and the upper and lower ends of the anterior cervical fixation plate are respectively provided with fixing holes for fixing with the cervical spine. The present invention can fix the entire cervical intervertebral fusion device on the upper and lower vertebral bodies by designing an integrally formed anterior cervical fixation plate and fusion device main body, preventing it from slipping forward or sliding backward to compress the central nerve; and both It is made of medical degradable materials, which can be degraded by itself after surgery, effectively reducing the discomfort of patients and avoiding the need for secondary surgical removal.

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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Patent Type & Authority Patents(China)
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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