Patent US5947971A successfully refreshed from Google Patents.
US5947971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinal stabilization surgical apparatus
Assignee: Zimmer Spine Inc
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Filing: 1996-11-21
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Granted: 1999-09-07
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Expires: 2016-11-21
Abstract
Abstract Spinal fusion implants are inserted into a disc space of disc material separating first and second vertebrae by forming bores between the vertebrae. A distraction spacer is temporarily put in place on one side of the vertebrae while a bore is being formed on an opposite of the vertebrae.
Inventors
- 👤 Stephen D. Kuslich
- 👤 Douglas W. Kohrs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:16
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1757; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30744; A61F2/44; A61F2/4455; A61F2/446; A61F2/46; A61F2/4603; A61F2/4611; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/02; A61B17/025; A61B2017/0256; A61F2/30723; A61F2/442; A61F2/4637; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30316; A61F2002/30329; A61F2002/30476; A61F2002/305; A61F2002/30535; A61F2002/30593; A61F2002/30667; A61F2002/30672; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3085; A61F2002/30861; A61F2002/30868; A61F2002/448; A61F2002/4681; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0063; A61F2230/0069
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
317 words
A kit for preparing a site for implanting at least one spinal fusion implant into a disk space of disk material separating a first and second vertebrae, said kit comprising: a distraction spacer having a leading end and a trailing end wherein said leading end of said distraction spacer has a tapered surface and said distraction spacer is sized with a transverse dimension smaller than a transverse dimension of said implant and further sized to be inserted into said disk space at a first location with said distraction spacer sized for external surfaces of said distraction spacer to urge against said end plates of said first and second vertebrae to urge said vertebrae apart upon said insertion; a hollow guide tube for directing surgical tools from a proximal end of said guide tube through a distal end of said guide tube by acting on external surfaces of said tools to control a direction of movement of said tools; a tube guide for placing said guide tube at a second location, said guide tube adapted to direct tools axially through an axis parallel to and equidistant between opposing end plates of said first and second vertebrae, said tube guide including spacer means at said distal end of said tube guide with said spacer means sized for said guide tube to slip in close tolerance with said tube guide; said tube guide and said guide tube mutually sized for said tube guide and said spacer means to be withdrawn through said guide tube and removed through a proximal end of said guide tube; a boring tool sized to be inserted into and advanced through said guide tube to said second location for forming an implant bore at said second location, said boring tool restrained relative to said guide tube to prevent lateral movement of said boring tool relative to said guide tube as said boring tool is axially advanced.
Claim 2
Dependent Claim
317 words
A kit for preparing a site for implanting at least one spinal fusion implant into a disk space of disk material separating a first and second vertebrae, said kit comprising: a distraction spacer having a leading end and a trailing end wherein said leading end of said distraction spacer has a tapered surface and said distraction spacer is sized with a transverse dimension smaller than a transverse dimension of said implant and further sized to be inserted into said disk space at a first location with said distraction spacer sized for external surfaces of said distraction spacer to urge against said end plates of said first and second vertebrae to urge said vertebrae apart upon said insertion; a hollow guide tube for directing surgical tools from a proximal end of said guide tube through a distal end of said guide tube by acting on external surfaces of said tools to control a direction of movement of said tools; a tube guide for placing said guide tube at a second location, said guide tube adapted to direct tools axially through an axis parallel to and equidistant between opposing end plates of said first and second vertebrae, said tube guide including spacer means at said distal end of said tube guide with said spacer means sized for said guide tube to slip in close tolerance with said tube guide; said tube guide and said guide tube mutually sized for said tube guide and said spacer means to be withdrawn through said guide tube and removed through a proximal end of said guide tube; a boring tool sized to be inserted into and advanced through said guide tube to said second location for forming an implant bore at said second location, said boring tool restrained relative to said guide tube to prevent lateral movement of said boring tool relative to said guide tube as said boring tool is axially advanced.
Claim 3
Dependent Claim
37 words
A kit according to claim 1 wherein said guide tube includes an open distal end and open proximal end with attachment means on said distal end for securing said distal end to said first and second vertebrae.
Claim 4
Dependent Claim
32 words
A kit according to claim 1 wherein said spacer means is a guide pin sized to be urged between said first and second vertebrae and equal in size to said distraction spacer.
Claim 5
Dependent Claim
56 words
A kit according to claim 1 wherein said distraction spacer is one of a plurality of distraction spacers of different sizes corresponding with a plurality of potential amounts of desired distraction; wherein said spacer means is one of a plurality of spacer means each approximating in size a respective one of said plurality of distraction spacers.
Claim 6
Dependent Claim
23 words
A kit according to claim 4 wherein each of said spacer means is removably attachable to said distal end of said tube guide.
Claim 7
Dependent Claim
194 words
A tool for use in a spinal implant procedure in a human, said tool comprising: a boring tool having a distal end coupled to a proximal end for rotation of said distal end upon rotation of said proximal end, said distal end including a threaded bore oriented parallel to a longitudinal axis of said boring tool; a cutting portion on said distal end for cutting a bore of a diameter greater than a predetermined spacing between end plates of opposing vertebrae with said bore formed between said opposing vertebrae upon rotation of said cutting portion about its axis when said cutting portion is received between said vertebrae; a guide pin being selectively attachable and detachable to said threaded bore at said distal end of said boring tool and having external surfaces generally symmetric about said axis and with said surfaces spaced from said axis a distance selected for said surfaces to abut end plates of said vertebrae upon insertion of said guide pin between said vertebrae; whereby said guide pin maintains said axis of said cutting portion in parallel and equidistant spacing between said vertebrae as said cutting portion is advanced between said vertebrae.
Claim 8
Dependent Claim
194 words
A tool for use in a spinal implant procedure in a human, said tool comprising: a boring tool having a distal end coupled to a proximal end for rotation of said distal end upon rotation of said proximal end, said distal end including a threaded bore oriented parallel to a longitudinal axis of said boring tool; a cutting portion on said distal end for cutting a bore of a diameter greater than a predetermined spacing between end plates of opposing vertebrae with said bore formed between said opposing vertebrae upon rotation of said cutting portion about its axis when said cutting portion is received between said vertebrae; a guide pin being selectively attachable and detachable to said threaded bore at said distal end of said boring tool and having external surfaces generally symmetric about said axis and with said surfaces spaced from said axis a distance selected for said surfaces to abut end plates of said vertebrae upon insertion of said guide pin between said vertebrae; whereby said guide pin maintains said axis of said cutting portion in parallel and equidistant spacing between said vertebrae as said cutting portion is advanced between said vertebrae.
Claim 9
Dependent Claim
31 words
A tool according to claim 6 wherein said guide pin includes cutting members on an axial face of said guide pin for engaging and cutting vertebra disposed between said end plates.
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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) | 2002-09-06 | 2003-03-08 | 2003-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-06 | 2007-03-08 | 2007-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-06 | 2011-03-08 | 2011-09-07 | $7700.00 | Window Closed / Lapsed |