Fusion cage

By designing a multi-directional deformation fusion device, the problems of poor bone grafting effect, low bone fusion rate and large surgical trauma in the prior art are solved, and the size of the fusion device is adjustable and multi-directional adaptation is achieved, which improves surgical effect and safety.

CN119700382AActive Publication Date: 2025-03-28DECANS MEDICAL DEVICES CO LTD
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Patent Information

Application Number
CN202411911838.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-03-28
Estimated Expiration
2044-12-24

AI Technical Summary

Technical Problem

The existing fusion devices have problems such as poor bone grafting effect, low bone fusion rate, unsatisfactory recovery of physiological lordosis after vertebral fusion, and great surgical trauma during surgery.

Method used

A fusion device is designed including a drive assembly, an inner housing and an outer housing. The drive assembly realizes the retraction and release in four directions: up, down, left and right through deformation and supportable openings. The inner shell is composed of a plurality of retractable openings that can be separated, and the outer shell is made of memory alloy, which can be adjusted as needed to adapt to the insertion environment.

Benefits of technology

Through the adjustable size and multi-directional deformation function of the fusion device, it can maintain the minimum volume before implantation in the body to reduce surgical trauma, adapt to the intervertebral environment for fusion after insertion, improve the bone grafting effect and bone fusion rate, and facilitate secondary surgery removal and revision.

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Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a fusion cage which comprises a driving assembly and a fusion cage body, the driving assembly comprises a driving part and a deformation part connected with the driving part, the driving part moves between a first position and a second position, and the deformation part is driven by the driving part to deform; when the driving part is located at the first position, the deformation part is in a contraction state and is close to the central shaft; when the driving part is located at the second position, the deformation part is in an open state and is far away from the central shaft; the driving assembly is sleeved with the inner shell, the inner shell comprises a plurality of separable expandable bodies, the adjacent expandable bodies are elastically connected, when the deformation part is in the contraction state, the expandable bodies are close to the center shaft, and when the deformation part is in the open state, the expandable bodies are pushed to be away from the center shaft; the outer shell is arranged on the outer side of the inner shell in a sleeving mode, the outer shell is made of memory alloy, when entering the to-be-inserted position, the outer shell is in an open state, and the inner shell is driven by the driving assembly to be in the open state so as to support the outer shell to keep stable.
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