Patent US2810883A successfully refreshed from Google Patents.
Patent EP0732093A2 successfully refreshed from Google Patents.
EP0732093A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Interbody spinal fusion implants
Assignee: SDGI Holdings Inc
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Filing: 1996-02-02
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Granted: —
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Expires: 2016-02-02
Abstract
Abstract The present invention discloses a spinal fusion implant that is at least partially cylindrical, made of material appropriate for human implantation and having preferably, but not necessarily, one closed end and one end capable of being closed, such that an internal chamber can be filled and hold any natural or artificial osteoconductive, osteoinductive, osteogenic, or other fusion enhancing material. The partially cylindrical implant directly participates and is incorporated in the ensuing fusion. In the preferred embodiment, the implant of the present invention relies on surface roughenings of the outer surface to enhance its stability and resist dislodgement from within the disc space between two adjacent vertebrae. The implant of the present invention incorporates at its rear end, an engagement means to facilitate insertion or extraction of the implant. The implant may be filled with, coated with, and/or composed of, fusion promoting substances. Finally, the implant of the present invention does not require rotation for its insertion and can be seated by linear advancement.
Inventors
- 👤 Gary Karlin Michelson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 23:10
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/446; A61B17/16; A61B17/1662; A61B17/1671; A61B17/17; A61B17/1739; A61B17/1757; A61F2/30721; A61F2/30744; A61F2/30767; A61F2/30771; A61F2/46; A61F2/4603; A61F2/4611; A61B17/8875; A61B17/8886; A61B17/8888; A61B17/02; A61B17/025; A61B2017/0256; A61B17/92; A61B2017/922; A61B90/00; A61B90/03; A61B2090/033; A61B2090/036; A61F2/442; A61F2/4657; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/3013; A61F2002/30131; A61F2002/30138; A61F2002/30143; A61F2002/30148; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30535; A61F2002/30593; A61F2002/30604; A61F2002/30772; A61F2002/30774; A61F2002/30777; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/30795; A61F2002/30797; A61F2002/30836; A61F2002/3085; A61F2002/30878; A61F2002/30879; A61F2002/30904; A61F2002/30906; A61F2002/448; A61F2002/449; A61F2002/4619; A61F2002/4625; A61F2002/4627; A61F2002/4629; A61F2002/4681; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/001; A61F2230/0013; A61F2230/0017; A61F2230/0063; A61F2230/0069; A61F2250/00; A61F2250/0058; A61F2250/006; A61F2250/0063; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00179; A61F2310/00293; A61F2310/00389; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
36 words
A partially cylindrical spinal fusion implant made of a material appropriate for human implantation, said implant comprising a cylinder having a longitudinal central axis and at least a first flat side parallel to said central axis.
Claim 2
Dependent Claim
17 words
The spinal fusion implant of claim 1 in which said implant has a plurality of flat sides.
Claim 3
Dependent Claim
22 words
The spinal fusion implant of claim 1 in which said implant has a second flat side diametrically opposite said first flat side.
Claim 4
Dependent Claim
15 words
The spinal fusion implant of claim 1 in which said implant has an internal chamber.
Claim 5
Dependent Claim
19 words
The spinal fusion implant of claim 4 in which said internal chamber is capable of containing fusion promoting material.
Claim 6
Dependent Claim
18 words
The spinal fusion implant of claim 4 in which said implant comprises a wall surrounding said internal chamber.
Claim 7
Dependent Claim
24 words
The spinal fusion implant of claim 6 in which said wall has a plurality of openings passing therethrough in communication with said internal chamber
Claim 8
Dependent Claim
17 words
The spinal fusion implant of claim 1 having a plurality of openings capable retaining fusion promoting material.
Claim 9
Dependent Claim
24 words
The spinal fusion implant of claim 1 in which said implant has a major diameter larger than the disc space between two adjacent vertebrae.
Claim 10
Dependent Claim
42 words
The spinal fusion implant of claim 1 including a plurality of surface rouglieiiings for engaging said two adjacent vertebrae and for maintaining said implant in place, said surface roughenings being present on at least a portion of the exterior of said implant.
Claim 11
Dependent Claim
17 words
The spinal fusion implant of claim 10 in which said surface roughenings include a plurality of ratchetings.
Claim 12
Dependent Claim
14 words
The spinal fusion implant of claim 11 in which said ratchetings face one direction.
Claim 13
Dependent Claim
14 words
The spinal fusion implant of claim 10 in which said surface roughenings include knurling.
Claim 14
Dependent Claim
16 words
The spinal fusion implant of claim 1 in which said implant comprises a bone ingrowth material.
Claim 15
Dependent Claim
27 words
The spinal fusion implant of claim 4 in which said implant has at least one removable cap for closing at least one end of said internal chamber
Claim 16
Dependent Claim
27 words
The spinal fusion implant of claim 1 in which one end of said implant includes an engagement means for engaging instrumentation for the insertion of said implant.
Claim 17
Dependent Claim
26 words
The spinal fusion implant of claim 1 in which said cylinder includes first and second diametrically opposed arcuate portions that are arcs of the same circle.
Claim 18
Dependent Claim
78 words
A hollow partially cylindrical spinal fusion implant made of a material appropriate for human implantation, comprising: a cylinder having a longitudinal central axis and at least a first flat side parallel to said central axis, said implant having a major diameter larger than the height of the disc space between two adjacent vertebrae and a width measure from said first flat side to a diametrically opposed segment of said cylinder, said width being smaller than said major diameter.
Claim 19
Dependent Claim
65 words
A hollow cylindrical spinal fusion implant made of a material appropriate for human implantation, comprising: a cylindrical member having a wall surrounding an internal chamber, said wall having a plurality of openings passing therethrough in communication with said internal chamber, said implant having a plurality of surface roughenings on the exterior of said cylindrical member for engaging said vertebrae to maintain said implant in place.
Claim 20
Dependent Claim
17 words
The spinal fusion implant of claim 19 in which said surface rouglienings include a plurality of ratchetings.
Claim 21
Dependent Claim
14 words
The spinal fusion implant of claim 20 in which said ratchetings face one direction.
Claim 22
Dependent Claim
14 words
The spinal fusion implant of claim 19 in which said surface roughenings include knurling.
Claim 23
Dependent Claim
16 words
The spinal fusion implant of claim 19 in which said implant comprises a bone ingrowth material.
Claim 24
Dependent Claim
19 words
The spinal fusion implant of claim 19 in which said internal chamber is capable of retaining fusion promoting material.
Claim 25
Dependent Claim
20 words
The spinal fusion implant of claim 19 in which said plurality of openings are capable of retaining fusion promoting material.
Claim 26
Dependent Claim
27 words
The spinal fusion implant of claim 19 in which said implant has an outer diameter larger than the disc space between two adjacent vertebrae to be fused.
Claim 27
Dependent Claim
27 words
The special fusion implant of claim 19 in which said implant has at least one removable cap for closing at least one end of said internal chamber.
Claim 28
Dependent Claim
16 words
The spinal fusion implant of claim 19 in which said implant comprises a fusion promoting material.
Claim 29
Dependent Claim
16 words
The spinal fusion implant of claim 1 in which said implant comprises a fusion promoting material.
Claim 30
Independent Claim
151 words
A method for inserting a plurality of partially cylindrical spinal fusion implants made of a material appropriate for human implantation, each of said plurality of implants comprising a cylinder having a longitudinal central axis and at least one flat side parallel to said central axis, said implant having a maximum diameter larger than the disc space between two adjacent vertebrae, comprising the steps of: drilling two partially overlapping cylindrical holes across the disc space between the two adjacent vertebrae; inserting a first of said partially cylindrical spinal fusion implants having a first flat side into one of said overlapping cylindrical holes, said first flat side being oriented perpendicular to the plane of said disc space; inserting a second of said partially cylindrical implants having a second flat side into a second of said overlapping holes, said second flat; side being adjacent and facing said first flat side of said first implant.
Claim 31
Independent Claim
167 words
A method for inserting a plurality of partially cylindrical spinal fusion implants made of a material appropriate for human implantation, each of said plurality of implants comprising a cylinder having a longitudinal central axis and at least one flat side parallel to said central axis, said implant having a diameter larger than the disc space between two adjacent vertebrae, said disc space being in a plane perpendicular to the longitudinal vertical axis of the spinal column, comprising the steps of: drilling two partially overlapping cylindrical holes across the disc space between the two adjacent vertebrae; inserting a first of said partially cylindrical spinal fusion implants having a first flat side into one of said overlapping cylindrical holes, said first flat side being oriented perpendicular to the plane of said disc space; inserting a second of said partially cylindrical implants having a second flat side into a second of said overlapping holes, said second flat side being adjacent and facing said first flat side of the first implant.
Claim 32
Dependent Claim
74 words
A partially cylindrical spinal fusion implant made of a material appropriate for human implantation, said spinal fusion implant comprising a partially cylindrical portion having an exterior surface configured to be placed in close proximity to a second partially cylindrical spinal fusion implant, said first and second implants whem placed together having a combined overall width that is less than the sum of the individual maximum diameters of each of said first and second implant.
References Cited (Backward Citations)
No citation records indexed.
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