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Cervical vertebra interbody fusion cage

A technology of intervertebral fusion device and fusion device, which is applied in the field of cervical intervertebral fusion device, to achieve the effect of reducing discomfort and avoiding the removal of secondary surgery

Inactive 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 intervertebral fusion device made of medical degradable materials in view of the above-mentioned defects in which a separate titanium plate or stainless steel plate is used to block the fusion device at the front end of the existing cervical intervertebral fusion device. Cervical intervertebral fusion cage fixed together with fusion cage body

Method used

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  • Cervical vertebra interbody fusion cage
  • Cervical vertebra interbody fusion cage
  • Cervical vertebra interbody fusion cage

Examples

Experimental program
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Effect test

Embodiment 1

[0047] 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.

[0048] The anterior cervical fixation plate 2 is made of pure racemic polylactic acid (PDLLA, with a ...

Embodiment 2

[0051] 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.

[0052] The anterior cervical fixation plate 2 is made of pure left-handed polylactic acid (PLLA, with a molecular weight of 200,000);...

Embodiment 3

[0055] 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. 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, a first fixing hole used for being connected with the front end of the fusion cage body is formed in the middle of the anterior cervical approach fixing plate, and second fixing holes used for being connected with the cervical vertebra are formed in the upper end and lower end of the anterior cervical approach fixing plate respectively. By fixing the anterior cervical approach fixing plate and the fusion cage body which are made of the medical degradable material together, 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, and more specifically relates to a cervical intervertebral fusion device. 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 physiological en...

Claims

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Application Information

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IPC IPC(8): A61F2/44A61B17/70A61L27/58A61L27/18
Inventor 杨述华刘先哲许伟华王晶崔福斋仇志烨张自强
Owner 杨述华
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