Hinged Bone Plate and Related Methods

a technology of thoracic/lumbar plate and thoracic spine, which is applied in the field of anterior thoracic/lumbar plate insertion, can solve the problems of less effective control of vertebral motion by redundant annular fibers, less able to handle compression load, and thinner nucleus, and achieves comfortable fitting of patient anatomy and low profil

Inactive Publication Date: 2008-09-18
NUVASIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The hinged plate system offers improved spinal stability, reduces the risk of screw backout, and facilitates easier implantation, promoting successful fusion and healing by providing a secure and adjustable connection between vertebrae.

Problems solved by technology

The nucleus becomes thinner and less able to handle compression loads.
The redundant annular fibers are less effective in controlling vertebral motion.
Disc herniation can also cause arthritis of the facet joints, which, in turn, may cause back pain.
Such problems may include pain in the back or legs, nerve injury, risk of future nerve injury, or spinal deformity.
This device is difficult to place, and over-penetration of the screws can result in damage to the spinal cord.
Problems have resulted from over rigid fixation and stress shielding, resulting in nonunion of the bony fusion, chronic micromotion during healing, resulting in stress fracture of the fixation device at either the screw to the plate resulting in screw backout, or inadequate fixation strength and resultant collapse of the graft and angulation of the spine.
However, this construct extends outwardly further than a plate / screw system, potentially affecting the surrounding muscle, and causing pain to the patient.
However, while screws without nuts are easier to insert, they also are known to back out, causing potential failure of the fusion.

Method used

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  • Hinged Bone Plate and Related Methods
  • Hinged Bone Plate and Related Methods
  • Hinged Bone Plate and Related Methods

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Embodiment Construction

[0046]Illustrative embodiments of the invention are described below. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure. The hinged anterior thoracic / lumbar plate disclosed herein boasts a variety of inventive features and components that warrant patent protection, both individually and in combination.

[0047]Spinal plate systems using a combination of screws and bolts to attach plates to the poster...

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Abstract

A bone plate system comprising a thin plate and fasteners for securing the plate to at least two segments of bone. The plate may be hinged along the central axis, with a pair of collinear holes on each portion of the plate. Each of the holes accommodates a bolt which is screwed into the bone and secured to the plate using a nut.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001]The present application is a division of commonly owned and co-pending U.S. patent application Ser. No. 10 / 860,850, filed on Jun. 3, 2004, now issued as U.S. Pat. No. 7,341,590, which is division of commonly owned and co-pending U.S. patent application Ser. No. 10 / 108,287 filed Mar. 27, 2002, now issued as U.S. Pat. No. 6,764,489, the complete disclosures of which are hereby incorporated herein by reference in their entireties for all purposes. Additionally, the present application claims benefit under 35 U.S.C. § 119(e) from U.S. Provisional Application Ser. No. 60 / 279,157, filed on Mar. 27, 2001, the entire contents of which are hereby expressly incorporated by reference into this disclosure as if set forth fully herein.BACKGROUND OF THE INVENTION[0002]I. Field of the Invention[0003]This invention relates generally to devices for use in spinal surgery, and, in particular, to a hinged anterior thoracic / lumbar plate which is implantable ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61B17/80A61B17/56A61B17/70A61B17/86
CPCA61B17/7059A61B17/8695A61B17/8665A61B17/8047Y10S606/901Y10S606/907Y10S606/909Y10S606/90
InventorFERREE, BRET A.
OwnerNUVASIVE