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EP0307241B1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Surgical prosthetic implant

Assignee: BRANTIGAN John W
•
Filing: 1988-09-09
•
Granted: 1992-12-23
•
Expires: 2008-09-09
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Abstract

Abstract Prosthetic plug implants (11,31-34,111) forming side-by-side transverse struts between adjacent vertebrae having roughened surfaces (11b,31b,32b,34d,122) receiving bone ingrowth to fuse the plugs on prepared surface sites (15,115) on opposed faces of adjacent vertebrae and have end faces (11a,31a,34a,111c) with tool receiving recesses (19,111d) securing the plug on a tool (24,120) for insertion on the prepared sites of the vertebrae and for removing the tool from the plug without disturbing its position on the sites. These sites can be prepared by feeding a drill (21) through a guide (22) fixed to posterior or anterior sides of adjacent vertebrae to form the prepared sites including cortex bone (18,118) in the opposed faces of the adjacent vertebrae and terminating the drilling in advance of the opposite sides of the vertebrae (16,116). Gauge blocks (119) may be used to stretch collapsed disc tissue (112a) between the vertebrae to reclaim normal disc space between the vertebrae. A preferred implant (111) is rectangular, has nubs, (122) on the sidewalls thereof, slots (124-125) receiving bone graft material (26) and is formed of radiolucent material.

Inventors

  • 👤 John W. Brantigan

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 18:07
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/4465; A61B; A61B17/00; A61B17/16; A61B17/1604; A61B17/1662; A61B17/1671; A61B17/17; A61B17/1739; A61B17/1757; A61B17/56; A61B17/58; A61B17/68; A61B17/686; A61F2/42; A61F2/446; A61F2/447; A61F2/46; A61F2/4603; A61F2/4611; A61B17/70; A61B17/7059; A61B17/84; A61B17/86; A61B90/00; A61B90/39; A61F2/30721; A61F2/30723; A61F2/30767; A61F2/30771; A61F2/3094; A61F2/30965; A61F2/442; A61F2/4684; A61F2/28; A61F2002/2835; A61F2002/2839; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30121; A61F2002/30123; A61F2002/30138; A61F2002/30153; A61F2002/30154; A61F2002/30159; A61F2002/30179; A61F2002/30199; A61F2002/30224; A61F2002/30261; A61F2002/30263; A61F2002/3028; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30535; A61F2002/30576; A61F2002/30578; A61F2002/30593; A61F2002/30772; A61F2002/30774; A61F2002/30795; A61F2002/30797; A61F2002/308; A61F2002/30805; A61F2002/30836; A61F2002/30841; A61F2002/3085; A61F2002/30904; A61F2002/448; A61F2002/449; A61F2002/4625; A61F2002/4627; A61F2002/4629; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0017; A61F2230/0019; A61F2230/0021; A61F2230/0028; A61F2230/0058; A61F2230/0063; A61F2230/0069; A61F2230/0082; A61F2230/0084; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; Y; Y10; Y10S; Y10S606/00; Y10S606/907

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 160 words
A prosthesis for insertion into transverse prepared grooves of substantially uniform transverse cross-section along the length thereof (115) in opposed faces of adjoining vertebrae (2-3, 3-4) of a vertebral column (100), adjoining vertebrae having a disc space therebetween, said prosthesis, when inserted, comprising side-by-side rigid inert plugs of generally uniform transverse cross-section along the length thereof (111) to form transverse struts bottomed on the prepared grooves of adjoining vertebrae and maintaining a desired disc space between said adjoining vertebrae, each plug having an end face with tool receiving means (111d) extending internally of the plug for fixedly mounting the plug endwise on a tool (120) to facilitate endwise insertion of the plug on the prepared grooves, a peripheral surface (122) of the plugs being roughened over substantially the whole area thereof for interlocking with said prepared grooves to facilitate bone ingrowth from the vertebrae, each plug having at least one slot (124,125) therethrough, adapted to receive bone graft material (126).
Claim 2
Dependent Claim 45 words
A prosthesis as claimed in claim 1, wherein the plug roughened surfaces are barbs (122) radiating from each plug and having leading faces (122c) sloping toward the tool receiving end of the plug to bite into the vertebrae and provide extended areas receiving bone ingrowth.
Claim 3
Dependent Claim 36 words
A prosthesis as claimed in claim 1 or 2, wherein the tool receiving means is an internally threaded hole (111d) in the end face of each plug for threaded engagement with the end of the tool.
Claim 4
Dependent Claim 24 words
A prosthesis as claimed in claim 3, wherein each plug comprises a radial slot in the end face radiating from the internally threaded hole.
Claim 5
Dependent Claim 18 words
A prosthesis as claimed in any one of the preceding claims, wherein each said plug ccomprises radiolucent material.
Claim 6
Dependent Claim 31 words
A prosthesis as claimed in any one of the preceding claims, wherein each plug comprises a nylon, polycarbonate, polypropylene, polyacetal or polysulfone plastic which is filled with glass or carbon fibres.

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