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Bone Plate With Retainer and Stop for Screw Lock

a technology of screw lock and bone plate, which is applied in the field of devices, can solve the problems of affecting the correct amount of rotation of the lock

Inactive Publication Date: 2014-03-27
SPINAL US
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Prevents bone screw lock fracture and ensures secure fixation of bone screws by providing a clear indication of the correct rotation, thereby enhancing the stability and reliability of bone plate fixation.

Problems solved by technology

Such flexing can cause damage to the bone screw lock, risking fracture of the lock.
In addition, one difficulty that can arise with the use of such rotatable bone screw locks is that the practitioner does not have a way of knowing when the lock has been rotated the correct amount to adequately block the underlying bone screw from backing out, other than mere visual inspection.

Method used

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  • Bone Plate With Retainer and Stop for Screw Lock
  • Bone Plate With Retainer and Stop for Screw Lock
  • Bone Plate With Retainer and Stop for Screw Lock

Examples

Experimental program
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Embodiment Construction

[0027]Referring to the drawing figures, like reference numerals designate identical or corresponding elements throughout the several figures.

[0028]The aforementioned two patent document describe bone plates and locks for the screws of bone plates; as those of ordinary skill in the art are well familiar with bone plates, screws for bone plates, and locks for the screws of bone plates, the details of those devices will not be included herein.

[0029]In general terms, in addition to the various features described in the two aforementioned patent documents, in accordance with principles of the present invention, a bone plate can be provided with a stop, a retainer, or both, for each one or more of the bone screw locks (also called a ‘bow-tie rivet’ herein). In essence, the stop is sized and positioned so that, when the bow-tie rivet is rotated in one direction, e.g., clockwise, the leading edge of the rivet hits the stop and prevents further rotational motion of the rivet. The lower surfa...

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PUM

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Abstract

A bone plate, having a bone screw and a rotatable lock for retaining the bone screw in place, includes a retainer element and / or a stop element. The retainer element inhibits the lock from being pushed off of the bone plate, while the stop element limits the rotational range of motion of the lock.

Description

[0001]This application is a Continuation of, and claims priority under 35 U.S.C. §120 to, U.S. patent application Ser. No. 12 / 567,978, filed 28 Sep. 2009, which claimed priority under 35 U.S.C. §119 to U.S. provisional patent application no. 61 / 101,737, filed 01 Oct. 2008, the entireties of which are incorporated by reference herein.BACKGROUND[0002]1. Field of Endeavor[0003]The present invention relates to devices, systems, and processes useful as bone plates, and more specifically to improvements in such plates fitted with screw locks.[0004]2. Brief Description of the Related Art[0005]U.S. Pat. No. D592,946 relates to a design of a rotatable lock for the bone screws used to hold bone plates to a bone, such as anterior cervical plates used in spinal surgeries. U.S. Patent Application Publication No. 2008 / 0091206, “Bone Plate”, describes similar bone plates including rotatable screw locks. The entirety of each of these documents is incorporated by reference herein.[0006]While the bon...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/80
CPCA61B17/8052A61B17/7059A61B17/8042
Inventor WALKER, LAWRENCEJOHNSON, JEFFREYSEYMOUR, MORRISLEWISGHAVAM, CYRUS
Owner SPINAL US