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Cortical bone-based composite implants

Inactive Publication Date: 2003-07-24
REGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in a recent study evaluating the success and relief rates achieved according to these procedures, it was found that less than 100% success rate (fusion, patient improvement and absence of complications) was achieved, regardless of which method or implant was used (Grooms et al, 1996).

Method used

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  • Cortical bone-based composite implants
  • Cortical bone-based composite implants
  • Cortical bone-based composite implants

Examples

Experimental program
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Embodiment Construction

[0022] According to this invention, a substantially "D"-shaped cortical bone implant for cervical Smith-Robinson fusions is produced, preferably under aseptic conditions. Class 10 clean room processing is desirable, and sterilization of all machining tools is likewise preferred, (particularly after switching from one allograft donor to the next), so that the finished product may be treated by standard techniques known in the art (alcohol, peroxide, or like treatments), prior to storage and shipment to physicians for use in implantation procedures. Because of the peculiarities of working with bone, and in particular, because of the desirability of maintaining aseptic conditions while working with this material, novel approaches have been adopted in the production of the product of this invention.

[0023] The implant is preferably formed from cortical bone obtained from tibia, femur or other source of strong cortical bone. The bone source may be autograft or, due to possible complicatio...

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Abstract

An implant composed substantially of cortical bone is provided for use in cervical Smith-Robinson vertebral fusion procedures. The implant is derived from allograft or autograft cortical bone sources, is machined to form a symmetrically or asymmetrically shaped (e.g. a substantially "D"-shaped) implant having a canal running therethrough according to methods of this invention, and inserted into the space between adjacent cervical vertebrae to provide support and induce fusion of the adjacent vertebrae. Osteogenic, osteoinductive or osteoconductive materials may be packed into the canal of the implant to expedite vertebral fusion and to allow autologous bony ingrowth.

Description

1.0 BACKGROUND OF THE INVENTION[0001] 1.1 Field of the Invention[0002] This invention relates to a cortical bone implant for use in cervical Smith-Robinson vertebral fusion procedures, as well as methods for the manufacture and use thereof.[0003] 1.2 Background Art[0004] Since at least the mid to late 1950's anterior cervical spinal fusions have been performed in order to alleviate chronic neck, arm and shoulder pain caused by trauma, disc herniation, or spondylosis (Robinson and Smith, 1955; Smith and Robinson, 1958). The classic procedure referred to as the Smith-Robinson cervical fusion employs a horseshoe-shaped graft to promote vertebral fusion (Robinson et al., 1962). The Cloward technique employs a cancellous bone dowel (Cloward, 1958), and the Bailey-Badgley procedure uses a strut (Bailey and Badgley, 1960). In a study comparing the compressive load capacity of the various implants used according to these procedures, it was found that the Smith-Robinson graft could sustain l...

Claims

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Application Information

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IPC IPC(8): A61F2/00A61F2/28A61F2/30A61F2/46
CPCA61F2/3094A61F2310/00293A61F2002/2817A61F2002/2825A61F2002/2835A61F2002/2892A61F2002/30057A61F2002/30187A61F2002/30403A61F2002/30551A61F2002/30599A61F2002/30904A61F2002/30975A61F2002/4649A61F2220/0025A61F2230/0034A61F2250/0063A61F2/4644A61F2002/3055
Inventor GROOMS, JAMIE M.CARTER, KEVIN C.SANDER, TOMDULEBOHN, DAVID H.JOSSE, LOICBOYD, LAWRENCE M.BRANCH, CHARLES L.LIU, MINGYAN
Owner REGENERATION TECH
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