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Fusion device

A fusion device, a technology of spinal fusion, applied in the directions of internal bone synthesis, medical science, spinal implants, etc., can solve the problem of less firm implantation, achieve homogeneous connection, and facilitate the ingrowth of bone.

Inactive Publication Date: 2009-12-30
PIONEER SURGICAL TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While efforts can be made to reduce the impact of the boundary interface by reducing the size of the implant so that more graft material can be packed into the intervertebral space surrounding the implant, this results in a less robust to implant

Method used

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Embodiment Construction

[0039] The spinal fusion device of the present invention is used to form bone between two vertebrae while maintaining the height of the spinal disc between two adjacent vertebral bodies. The device allows for the injection of bone cement into one or more hollow cores in a fusion device. Bone cement fills the one or more hollow cores and engages the surface of the vertebral body on one or both sides of the implanted device. Once the bone cement sets, independent motion of the vertebrae is largely or completely eliminated. The devices, systems, and methods of the present invention reduce the time for fixation and improve the stability of the vertebral motion segment, thereby reducing or eliminating the need for secondary fixation. The present invention provides for a shorter spinal fusion procedure by reducing or eliminating the drilling, tapping or insertion of screws associated with secondary fixation. In some embodiments, as bony spinal fusion occurs, the bone cement resorb...

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Abstract

The spinal fusion device (100) of the invention is implanted within an intervertebral space between adjacent upper and lower vertebrae and secured to the vertebrae with cement. The fusion device includes upper and lower endplate facing surfaces (150, 160) each having at least one opening (120) for delivering cement material to adjacent contact surfaces of the vertebrae above and below the implant. Utilizing quick-setting cement compositions with the device <:an allow for almost immediate fusion of the vertebrae, thus, reducing or eliminating the need for adjuvant fixation devices such as screws, plates, and / or rods, while also simultaneously providing precise delivery of cement to contact surfaces between the fusion device and vertebrae.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of the filing date of US Provisional Application No. 60 / 851,972, filed October 16, 2006, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to spinal fusion implants for fusing adjacent vertebrae, and in particular, the present invention relates to implants positionable in the intervertebral space and secured in place with a cement composition. Background technique [0004] The spine primarily consists of a series of vertebrae and a spinal disc located in the space between adjacent vertebrae. The vertebrae are formed of hard bone, while the spinal discs include the softer annulus and nucleus pulposus. These spinal discs hold the vertebrae in place and allow the trunk to rotate and bend sideways and forward and backward. These spinal discs also act as shock absorbers or cushions when the spine experiences shocks,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44
CPCA61F2/28A61F2/447A61F2002/30772A61F2/4465A61F2230/0069A61B17/7098A61F2002/30904A61F2002/2817A61F2002/30062A61F2002/30586A61F2/4455A61F2/441A61F2002/30583A61F2230/0065A61F2310/00293A61F2002/4631A61F2210/0085A61F2310/00011A61F2002/30225A61F2310/00179A61F2002/302A61F2310/00353A61F2210/0004A61F2002/30579A61F2002/2835A61F2002/4495
Inventor 爱德华·S·阿恩约翰·茨维纳尔
Owner PIONEER SURGICAL TECH INC
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