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Flanged interbody fusion device with oblong fastener apertures

a fusion device and fusion device technology, applied in the field of spinal fixation systems and methods, can solve the problems of degenerative changes in bones, spine instability, pain and instability,

Inactive Publication Date: 2007-03-08
SPINAL ELEMENTS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The system effectively prevents screw loosening and backout, providing stable fixation and allowing for sequential attachment along the vertebral column, enhancing the treatment of spinal disorders by maintaining implant position and facilitating bone fusion.

Problems solved by technology

Advancing age, as well as injury, can lead to degenerative changes in the bones, discs, joints and ligaments of the spine, producing pain and instability.
Spine instability may result from causes such as fracture, scoliosis and spondylolisthesis, where one or more vertebrae move in a forward direction relative to the other vertebrae.
Early fixation devices tended to be applicable only to long bone injuries with only limited uses for lower lumbar spinal injuries and disorders.

Method used

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  • Flanged interbody fusion device with oblong fastener apertures
  • Flanged interbody fusion device with oblong fastener apertures
  • Flanged interbody fusion device with oblong fastener apertures

Examples

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Embodiment Construction

[0096] Advancing age, as well as injury, can lead to degeneration in the bones, discs, joints, and ligaments of the spine producing pain from nerve root compression. Under certain circumstances, alleviation of pain can be provided by performing a spinal fusion. Spinal fusion is a procedure that involves joining two or more adjacent vertebrae so that they no longer are able to move relative to each other.

[0097] In existing spinal fusion implants there have also been problems with loosening and backing out of screws into the patient's throat area. Backout is the exhibited tendency of bone screws, which affix the bone plate to the bone(s), to loosen with respect to both the plate and bone, resulting in poor fixation, fusion and ultimately, healing. Essentially, this loosening of the bone screw causes the screw to work itself out of the bone into which it is implanted. This results in the bone plate being poorly fixed in place thus becoming devoid of its fixation capabilities. Usually,...

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Abstract

Methods and devices are disclosed for treating the vertebral column. An integrated fixation device within fastener apertures and screws configured to resist backout of screws attaching the fixation device to bone is provided. In some embodiments, a fastener aperture insert is also provided to resist shear forces acting between the screw and fixation device. The fastener apertures and aperture inserts may have an oblong configuration. In some embodiments, an integrated fixation plate and spacer system is provided. Alternative fixation systems are also contemplated.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a continuation-in-part of U.S. application Ser. No. 11 / 374,665 filed on Mar. 13, 2006, which claims priority under 35 U.S.C. §119(e) to 1) U.S. Provisional Application No. 60 / 662,747 filed on Mar. 17, 2005, and 2) U.S. Provisional Application No. 60 / 708,918 filed on Aug. 17, 2005, the disclosures of which are incorporated by reference herein in their entirety.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates generally to systems and methods for performing spinal fixation. The invention comprises one or more vertebral spacers that feature an attachment system that resists backing out of the screws used to attach the spacers to the vertebrae. The invention may be configured so that multiple adjacent spacers may be used along the vertebral column. [0004] 2. Description of the Related Art [0005] Advancing age, as well as injury, can lead to degenerative changes in the bones...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F2/30
CPCA61B17/7059A61F2310/00179A61B17/8047A61B2017/8655A61F2/447A61F2002/2817A61F2002/2835A61F2002/30062A61F2002/30131A61F2002/30166A61F2002/30378A61F2002/30462A61F2002/30471A61F2002/30484A61F2002/30495A61F2002/30505A61F2002/30514A61F2002/30517A61F2002/30578A61F2002/30677A61F2002/30772A61F2002/30794A61F2002/30904A61F2002/3092A61F2002/449A61F2210/0004A61F2220/0025A61F2220/0033A61F2220/0075A61F2220/0091A61F2230/0013A61F2230/0028A61F2310/00011A61B17/88A61F2/4455A61F2/46A61F2002/4415A61B17/8042A61F2002/3079A61B17/86
Inventor BLAIN, JASONMARTIN, GREG
Owner SPINAL ELEMENTS INC
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