US4834757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic implant
Assignee: BRANTIGAN W JOHN DR(CREIGHTON UNIVERSITY SCHOOL OF MEDICINE)
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Filing: 1988-03-28
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Granted: 1989-05-30
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Expires: 2008-03-28
Abstract
Abstract Gauge blocks or plugs and permanent implant plugs are provided for surgical procedures to support and fuse together adjacent vertebrae in a vertebral column. The plugs are rectangular with tapered front ends and tool receiving rear ends. The gauge blocks are smooth faced for removal but the implant plugs have roughened surfaces to grip the vertebrae and provide channels for bone ingrowth. The plugs have recesses in the form of through slots to be packed with bone graft material. In the surgical procedure, undamaged annulus fibrosus disc tissue connecting the adjacent vertebrae is preserved and a pair of side-by-side roughened implant plugs are forced into side-by-side transverse channels in the adjoining vertebrae to stretch the remaining annulus disc tissue and form struts supporting the vertebrae. The plugs are bottomed in the channels on cortex bone and bone ingrowth is facilitated to fuse the plugs to the vertebrae.
Inventors
- 👤 John W. Brantigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
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: 14
Claim 1
Independent Claim
157 words
A surgical prosthetic device adapted for fusing together adjoining vertebrae bodies connected by tissue of a damaged collapsed disc and having spaced opposed faces on opposite sides of the disc space therebetween with transverse channels in said faces including hard peripheral cortex bone surrounding central cancellous bone which comprises a rigid inert parallelpiped plug sized and shaped for snug seating in said channels spanning and stretching the disc tissue to maintain a desired disc space between the adjoining vertebrae bodies with opposite faces bottomed on at least the cortex bone portion of both adjacent bodies, said plug having at least one open ended slot therethrough exposed to the bone and adapted to be packed with bone implant material, and irregular surfaces on said plug having passages therebetween communicating with said slot and facilitating ingrowth of bone implant material from the slot and bone from the vertebrae bodies bottomed thereon to fuse said bodies together in fixed relation.
Claim 2
Dependent Claim
157 words
A surgical prosthetic device adapted for fusing together adjoining vertebrae bodies connected by tissue of a damaged collapsed disc and having spaced opposed faces on opposite sides of the disc space therebetween with transverse channels in said faces including hard peripheral cortex bone surrounding central cancellous bone which comprises a rigid inert parallelpiped plug sized and shaped for snug seating in said channels spanning and stretching the disc tissue to maintain a desired disc space between the adjoining vertebrae bodies with opposite faces bottomed on at least the cortex bone portion of both adjacent bodies, said plug having at least one open ended slot therethrough exposed to the bone and adapted to be packed with bone implant material, and irregular surfaces on said plug having passages therebetween communicating with said slot and facilitating ingrowth of bone implant material from the slot and bone from the vertebrae bodies bottomed thereon to fuse said bodies together in fixed relation.
Claim 3
Dependent Claim
140 words
A prosthetic device adapted for fusing together adjoining vertebrae with spaced opposed faces on opposite sides of a damaged collapsed vertebrae disc having tissue connecting the adjoining vertebrae bodies, said opposed faces of the vertebrae bodies having a pair of laterally spaced posterior to anterior extending transverse channels cut therein, and said disc tissue having openings therethrough aligned with the channels, which comprises a rigid inert plug having a greater height than the damaged disc space between the bottoms of the aligned channels for force fit into the channels to stretch the disc tissue to maintain the original undamaged disc space, and spaced nubs radiating from said plug for biting into surfaces of the channels and having passages therebetween to facilitate ingrowth of bone from the vertebrae bodies bottomed in the channels to fuse the bodies together in fixed relation.
Claim 4
Dependent Claim
140 words
A prosthetic device adapted for fusing together adjoining vertebrae with spaced opposed faces on opposite sides of a damaged collapsed vertebrae disc having tissue connecting the adjoining vertebrae bodies, said opposed faces of the vertebrae bodies having a pair of laterally spaced posterior to anterior extending transverse channels cut therein, and said disc tissue having openings therethrough aligned with the channels, which comprises a rigid inert plug having a greater height than the damaged disc space between the bottoms of the aligned channels for force fit into the channels to stretch the disc tissue to maintain the original undamaged disc space, and spaced nubs radiating from said plug for biting into surfaces of the channels and having passages therebetween to facilitate ingrowth of bone from the vertebrae bodies bottomed in the channels to fuse the bodies together in fixed relation.
Claim 5
Dependent Claim
106 words
A surgical prosthetic device adapted for fusing together adjoining vertebrae bodies which comprises a parallelepiped inert rigid plug having top, bottom, and side walls, a leading end and a trailing end, said leading end having a reduced nose surrounded by bevelled edges diverging to said top, bottom and side walls in spaced relation from each other, each nub having an inclined front face and a back wall cooperating therewith to define a sharp biting edge at the intersection thereof, and an open end slot through said plug between said leading and trailing ends communicating with said nubs and adapted to be packed with bone implant material.
Claim 6
Dependent Claim
106 words
A surgical prosthetic device adapted for fusing together adjoining vertebrae bodies which comprises a parallelepiped inert rigid plug having top, bottom, and side walls, a leading end and a trailing end, said leading end having a reduced nose surrounded by bevelled edges diverging to said top, bottom and side walls in spaced relation from each other, each nub having an inclined front face and a back wall cooperating therewith to define a sharp biting edge at the intersection thereof, and an open end slot through said plug between said leading and trailing ends communicating with said nubs and adapted to be packed with bone implant material.
Claim 7
Dependent Claim
35 words
The device of claim 3 including a first slot open to the top and bottom walls of the plug and a second slot intersecting the first slot open to the side walls of the plug.
Claim 8
Dependent Claim
20 words
The device of claim 3, wherein the plug has a length greater than height and a width less than height.
Claim 9
Dependent Claim
13 words
The device of claim 3, wherein the plug is composed of radiolucent material.
Claim 10
Dependent Claim
19 words
The device of claim 1, wherein the channels have flat sides and extend in a posterior to anterior direction.
Claim 11
Dependent Claim
21 words
The device of claim 1, wherein the plug has two slots intersecting each other at the longitudinal axis of the plug.
Claim 12
Dependent Claim
26 words
The device of claim 1, wherein the nubs have front faces sloping in the direction of insertion into the channels and sharp edges at their apices.
Claim 13
Dependent Claim
11 words
The device of claim 2, wherein the plug is a parallelepiped.
Claim 14
Dependent Claim
13 words
The device of claim 2, wherein the plug is composed of radiolucent material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |