Interlocking nail piece self-stabilizing interbody fusion cage

An intervertebral cage and self-stabilizing technology, applied in the direction of spinal implants, etc., can solve the problems of high risk of locking piece prolapse and inability to adjust the length of the cage, and achieve the effect of ensuring self-stabilizing performance

Pending Publication Date: 2021-10-26
浙江德康医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a self-stabilizing intervertebral fusion device with interlocking screws to solve the problem that the existing intervertebral fusion device uses a single type of insert or screw to fix the upper and lower vertebral bodies, and One or more of isolation of locks, high risk of lock dislodgement postoperatively, and inability to adjust the length of the fusion cage

Method used

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  • Interlocking nail piece self-stabilizing interbody fusion cage
  • Interlocking nail piece self-stabilizing interbody fusion cage
  • Interlocking nail piece self-stabilizing interbody fusion cage

Examples

Experimental program
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Effect test

Embodiment 1

[0057] A specific embodiment of the present invention, such as Figure 1-3 As shown, an intervertebral fusion device is disclosed, including a fusion device body 1, the length of the fusion device body 1 can be adjusted, such as Figure 4-10 As shown, the fusion device body 1 includes a bone graft body 11, an instrument body 16 and a connection assembly, the bone graft body 11 is connected to the instrument body 16 through the connection assembly, and the bone graft body 11 and the instrument body 16 are arranged along the length direction of the fusion body 1 .

[0058] By adjusting the connection assembly to control the distance between the bone graft body 11 and the instrument body 16, the length adjustment of the fusion cage body 1 can be realized conveniently and quickly, which overcomes the traditional fusion cage with two parts up and down that can only adjust the height of the fusion cage. The length of the fusion cage cannot be adjusted, resulting in the defect that ...

Embodiment 2

[0081] Another specific embodiment of the present invention discloses a self-stabilizing intervertebral fusion device with interlocking screws. The difference from the intervertebral fusion device in Embodiment 1 is that the locking part includes a fixed insert 2 and a universal self-locking screw 3.

[0082] Such as Figure 1-4 , Figure 14-16 As shown, the interlocking screw self-stabilizing intervertebral fusion cage includes a fusion body 1 and a locking piece; wherein, the locking piece includes a fixing insert 2 and a universal self-locking screw 3, and the tail end of the fixing insert 2 A screw hole is provided for the universal self-locking screw 3 to pass through and drive into the vertebra; A screw penetration channel and a fixed insertion piece penetration channel are respectively provided. Both the screw penetration channel and the fixed insertion piece penetration channel are connected to the installation port of the locking piece. The fixed insertion piece 2 a...

Embodiment 3

[0099] Another specific embodiment of the present invention, such as Figure 1-4 , Figure 14-15 As shown, an intervertebral fusion device is disclosed, which includes the fusion body 1 of Embodiment 1 and the locking member of Embodiment 2, that is, the locking member includes a fixing insert 2 and a universal self-locking screw 3 . Specifically, the fusion device body 1 includes a bone graft body 11, an instrument body 16, and a connection assembly. The bone graft body 11 is connected to the instrument body 16 through the connection assembly. Arrangement; the locking piece includes a fixed insert 2 and a universal self-locking screw 3, and the tail end of the fixed insert 2 is provided with a screw hole, and the screw hole is used for the universal self-locking screw 3 to pass through and drive into the vertebrae .

[0100] In this embodiment, the end face of the side wall of the fusion device body 1 is provided with a locking member installation port, and the upper surfac...

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Abstract

The invention relates to an interlocking nail piece self-stabilizing interbody fusion cage. The interbody fusion cage comprises a fusion cage body and a locking piece. A locking piece installation opening is formed in the end face of the side wall of the fusion cage body, and locking piece channels communicated with the locking piece installation opening are formed in the upper surface and the lower surface of the fusion cage body. The locking piece is installed in the locking piece installation opening, the locking piece comprises a fixed insertion piece and a universal self-locking screw, a screw hole is formed at the tail end of the fixed insertion piece, and the universal self-locking screw penetrates through the screw hole; and the fixed insertion piece and the universal self-locking screw are installed in the locking piece installation opening and penetrate through the locking piece channels to be implanted into the vertebra at a reverse included angle. A double-locking mechanism of the fixed insertion piece and the universal self-locking screw is adopted, the self-stability performance of the fusion cage is better, the length of the fusion cage is adjustable, the situation that a patient changes the operative position in an operation and an implant is improperly taken out in the operation is effectively avoided, the fusion rate is increased, and postoperative subsidence is effectively reduced.

Description

technical field [0001] This patent belongs to the technical field of medical devices and relates to an intervertebral fusion device, in particular to a self-stabilizing intervertebral fusion device with interlocking nails. Background technique [0002] Spinal intervertebral fusion is a common technique used to treat spinal diseases, including disc herniation, degenerative diseases, etc. It is a classic surgery for various spinal diseases. Usually clinical treatment is used to implant an intervertebral fusion device, which is used as a bone graft fusion carrier to establish and maintain the stability of the spine, restore the intervertebral height and the physiological curvature of the spine. [0003] A common intervertebral fusion device is only composed of a body, and after being implanted in the intervertebral space, internal fixation (screw rod) needs to be applied to maintain its stability. There are self-stabilizing cervical fusion cages or zero-profile cervical fusion...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): A61F2/44
CPCA61F2/447
Inventor孙新志许小波宁静王云张小曼
Owner浙江德康医疗器械有限公司