Intervertebral implants

Inactive Publication Date: 2001-10-18
OSTEOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One problem associated with known implants is the difficulty in adapting an implant to meet the size requirements of a particular intervertebral receiving bed.
For example, because anatomically all patients are different, the specific size of implant required for a surgical procedure will not be known to any certainty until a surgeon has prepared the intervertebral space for implantation.
Another problem associated with known implants constructed from bone is that the anatomical limitations of donor bone limit the size of the implant which

Method used

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[0047] Preferred embodiments of the presently disclosed intervertebral implant and implant extender will now be described in detail with reference to the drawings in which like reference numerals designate identical or corresponding elements in each of the several views.

[0048] FIGS. 1-5 illustrate a preferred embodiment of the presently disclosed intervertebral implant shown generally as 10. Briefly, implant 10 includes an upper surface 12, a lower surface 14 and a sidewall 15 positioned between the upper and lower surfaces. Upper and lower surfaces 12 and 14 each include a series of circular steps 16 which move upwardly from the outer periphery 18 of implant 10 to the center 20 of implant 10. Alternately, steps 16 need not be centered about the center of implant 10 nor do adjacent steps need be of the same height. A throughbore 22 extends between upper and lower surfaces 12 and 14 of implant 10. Throughbore 22 is dimensioned to receive growth factors including autograft, allograft...

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Abstract

A multipart intervertebral implant is provided which includes an implant portion and an implant extender portion. The implant portion and the implant extender portion can be fastened together using any known fastening means including pins, interlocking structure (e.g., dovetail, tongue and groove, etc.), adhesives, etc. The size of the implant extender portion can be selected during a surgical procedure to provide an implant suitable for a particular intervertebral receiving bed. An intervertebral implant is also provided which may be formed from a multiplicity of implant sections which are fastened together to provide an implant having a desired length. Implants having surface configurations which more closely correspond to the configuration of vertebral endplates are also provided.

Description

[0001] This application claims priority from United States provisional application Ser. No. 60 / 173,973, filed Dec. 30, 1999, which is incorporated herein by reference.[0002] 1. Technical Field[0003] The present disclosure relates generally to biocompatible implants and, more particularly, to intervertebral implants suitable for implantation into the lumbar, thoracic and / or cervical regions of the spine during a spinal fusion procedure.[0004] 2. Background of Related Art[0005] Intervertebral implants for fusing together adjacent vertebrae of a spinal column are well known in the art. Such implants are formed in a variety of different shapes and sizes and are configured for insertion into receiving beds formed in the lumbar, thoracic and cervical regions of the spine. The implants may be formed from a variety of different biologically compatible materials including ceramics, polymers, human or animal bone, composites, etc. The implants may also be shaped to maintain the natural lordos...

Claims

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Application Information

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IPC IPC(8): A61F2/00A61F2/28A61F2/30A61F2/44A61F2/46
CPCA61F2/28A61F2/30965A61F2/442A61F2/4455A61F2/4611A61F2002/2817A61F2002/2835A61F2002/2839A61F2002/30112A61F2002/30118A61F2002/30156A61F2002/30207A61F2002/3023A61F2002/30233A61F2002/30289A61F2002/30291A61F2002/30324A61F2002/30387A61F2002/30459A61F2002/30492A61F2002/30599A61F2002/30604A61F2002/30772A61F2002/30789A61F2002/30827A61F2002/3085A61F2002/30874A61F2002/4475A61F2220/0025A61F2220/0066A61F2230/0004A61F2230/0006A61F2230/0023A61F2230/0067A61F2230/0069A61F2230/0091A61F2250/0036A61F2250/0063A61F2310/00131A61F2310/00179A61F2310/00359A61F2002/30593A61F2002/30873
Inventor ALFARO, ARTHUR A.SHIMP, LAWRENCE A.RUSSELL, JAMESBOYLE, JOHN W.MARTZ, ERIK O.ROSENTHAL, DANIEL E.MORRIS, JOHN W.
Owner OSTEOTECH
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