EP0307241A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical prosthetic implant
Assignee: BRANTIGAN John W
•
Filing: 1988-09-09
•
Granted: —
•
Expires: 2008-09-09
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
2026-10-23 02:09
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: 13
Claim 1
Independent Claim
118 words
A prosthetis for a vertebral column (10,100) transverse prepared sites (15,115) opposed faces of adjoining vertebrae (2-3, 3-4) and a disc space (14,114) between the adjoining vertebrae which is characterised by side-by-side rigid plugs (11,31-34,111) sized and shaped to form transverse struts bottomed on the prepared sites of adjoining vertebrae and maintaining a desired disc space between said adjoining vertebrae, each plug having a roughened surface (11b,31b,32b,34,122) interlocking with said prepared sites to facilitate bone ingrowth from the vertebrae, and each plug having an end face with tool receiving means extending internally of the plug (19,111d) for fixedly mounting the plug endwise on a tool (24,120) to facilitate endwise insertion of the plug and on the prepared sites.
Claim 2
Dependent Claim
118 words
A prosthetis for a vertebral column (10,100) transverse prepared sites (15,115) opposed faces of adjoining vertebrae (2-3, 3-4) and a disc space (14,114) between the adjoining vertebrae which is characterised by side-by-side rigid plugs (11,31-34,111) sized and shaped to form transverse struts bottomed on the prepared sites of adjoining vertebrae and maintaining a desired disc space between said adjoining vertebrae, each plug having a roughened surface (11b,31b,32b,34,122) interlocking with said prepared sites to facilitate bone ingrowth from the vertebrae, and each plug having an end face with tool receiving means extending internally of the plug (19,111d) for fixedly mounting the plug endwise on a tool (24,120) to facilitate endwise insertion of the plug and on the prepared sites.
Claim 3
Dependent Claim
48 words
A prosthetis as claimed in claim 1, characterised in that the plug roughened surfaces are barbs (32,122) radiating from the rigid metal and having leading faces (32c,122c) sloping toward the tool receiving end of the plug to bite into the vertebrae and provide extended areas receiving bone ingrowth.
Claim 4
Dependent Claim
38 words
A prosthetis as claimed in claim 1 or 2, characterised in that the tool receiving means is an internally threaded hole (19,111d) in the end face of the plug for threaded engagement with the end of the tool.
Claim 5
Dependent Claim
24 words
A prosthetis as claimed in claim 3, characterised by including a radial slot (20) in the end face radiating from the internally threaded hole.
Claim 6
Dependent Claim
51 words
A prosthetis as claimed in any one of the preceding claims, characterised in that the plug is a solid rod (11,31-34,111) having a length sufficient to engage and hard cortex bone (18,118) of the vertebrae and span the soft cancellous bone (17,117) of the vertebrae without projecting beyond the cortex bone.
Claim 7
Dependent Claim
30 words
A prosthetis as claimed in any one of the preceding claims, characterised in that the plug has at least one slot (124,125) therethrough adapted to receive bone graft material (126).
Claim 8
Dependent Claim
137 words
A prosthetic device adapted for fusing together adjoining vertebrae (2-3,3-4) with spaced opposed faces on opposite sides of a damaged collapsed vertebrae disc having tissue (112a) connecting the adjoining vertebrae bodies, said opposed faces of the vertebrae bodies having aligned transverse channels (15,115) cut therein, and said disc tissue having openings (121a) therethrough aligned with the channels, characterised in that said device comprises a rigid inert plug (11,31-34,111) 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 surfaces (11b,31b,32b,34d,122) on said plug for engaging surfaces of the channels (15,115) to facilitate ingrowth of bone tissues from the vertebrae bodies bottomed in the channels to fuse the bodies together in fixed relation.
Claim 9
Dependent Claim
137 words
A prosthetic device adapted for fusing together adjoining vertebrae (2-3,3-4) with spaced opposed faces on opposite sides of a damaged collapsed vertebrae disc having tissue (112a) connecting the adjoining vertebrae bodies, said opposed faces of the vertebrae bodies having aligned transverse channels (15,115) cut therein, and said disc tissue having openings (121a) therethrough aligned with the channels, characterised in that said device comprises a rigid inert plug (11,31-34,111) 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 surfaces (11b,31b,32b,34d,122) on said plug for engaging surfaces of the channels (15,115) to facilitate ingrowth of bone tissues from the vertebrae bodies bottomed in the channels to fuse the bodies together in fixed relation.
Claim 10
Dependent Claim
26 words
A prosthetis or prosthetic device as claimed in any one of the preceding claims, characterised in that the plug (111) is formed from a radiolucent material.
Claim 11
Independent Claim
114 words
A method of fusing together adjoining vertebrae bodies (2-3,3-4) having spaced opposed faces with a disc space (14,114) therebetween while maintaining said disc space characterised by comprising mounting an inert rigid plug (11,31-34,111) with roughened surfaces (11b,31b,32b,34d,122) on the end of a tool (24,120), cutting opposed transverse channels (15,115) in said spaced opposed faces inwardly from adjoining sides of the vertebrae and terminating short of the opposite sides of the vertebrae (16,116), inserting the plug endwise on the tool into said channels to form a strut supporting the vertebrae, removing the tool from the plug without moving the plug, and facilitating bone ingrowth from the vertebrae around the roughened surfaces in bonded relation thereto.
Claim 12
Independent Claim
114 words
A method of fusing together adjoining vertebrae bodies (2-3,3-4) having spaced opposed faces with a disc space (14,114) therebetween while maintaining said disc space characterised by comprising mounting an inert rigid plug (11,31-34,111) with roughened surfaces (11b,31b,32b,34d,122) on the end of a tool (24,120), cutting opposed transverse channels (15,115) in said spaced opposed faces inwardly from adjoining sides of the vertebrae and terminating short of the opposite sides of the vertebrae (16,116), inserting the plug endwise on the tool into said channels to form a strut supporting the vertebrae, removing the tool from the plug without moving the plug, and facilitating bone ingrowth from the vertebrae around the roughened surfaces in bonded relation thereto.
Claim 13
Independent Claim
125 words
A method of using a prosthetis or prosthetic device as claimed in any one of claims 1 to 8, to fuse together spaced adjoining vertebrae bodies connected by collapsed damaged intervening disc tissues which is characterised by cutting aligned transverse channels (15,115) into the adjoining faces of the spaced vertebrae, providing an opening (121a) into the disc tissue (112a) communicating with the aligned channels, forcing a rigid inert plug (11,31-34,111) into the channels and opening in the disc tissue to spread the adjoining vertebrae apart and stretch the disc tissue to maintain the disc space of the undamaged disc, and providing irregular surfaces (11b,31b,32b,34d,122) on said plug to grip the surfaces of the channels and facilitate bone ingrowth to fuse the plug to the vertebrae.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.