US6165219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lordotic spinal implant
Assignee: Zimmer Spine Inc
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Filing: 1998-03-06
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Granted: 2000-12-26
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Expires: 2018-03-06
Abstract
Abstract A lordotic implant has a frusto-conical shape with external threads. Prior to placement of the implant, vertebrae are distracted in a manner to provide a desired lordosis between the vertebrae. The pre-distracted vertebrae are then tapped to provide a tapped bore having a geometry matching the conical geometry of the implant. The threaded implant is then placed within the pre-tapped conical bore.
Inventors
- 👤 Douglas W. Kohrs
- 👤 Paul M. Sand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4611; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1671; A61F2/44; A61F2/4455; A61F2/446; A61F2/442; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30205; A61F2002/3021; A61F2002/30217; A61F2002/30316; A61F2002/30535; A61F2002/30593; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30777; A61F2002/30784; A61F2002/30785; A61F2002/30795; A61F2002/30797; A61F2002/3085; A61F2002/30868; A61F2002/30873; A61F2002/4625; A61F2002/4627; A61F2230/00; A61F2230/0063; A61F2230/0067; Y; Y10; Y10S; Y10S606/00; Y10S606/916; Y10T; Y10T408/00; Y10T408/89; Y10T408/896; Y10T408/904; Y10T408/9046; Y10T408/90467; Y10T408/9048
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
260 words
A kit for placing an implant into a disk space between opposing vertebrae having opposing end plates to be separated by a predetermined degree of lordosis, said kit comprising: (A) an implant having: a generally frusto-conical hollow body having: a leading end a trailing end comprising: a trailing end rise a terminal end a longitudinal axis a first taper increasing from said leading end to said trailing end rise; and a second taper increasing from said terminal end to said terminal end rise said first taper of said frusto-conical body having a conical angle approximating said degree of lordosis; an implant thread pattern surrounding said body; openings formed through a conical wall of said body into an interior of said body with said openings formed at least on diametrically opposite sides of said body; said implant thread having a generally flat radial extremity in a surface of a cone defined by said implant thread; (B) a tap having; a shaft defining a longitudinal axis; a tapping head at a distal end of said shaft, said tapping head having a tapping thread surrounding said axis with a thread pattern substantially matching said implant thread pattern; said tapping thread includes a plurality of peaks and valleys defining a conical path around said axis with a leading end tap diameter adjacent said distal end and with a trailing end tap diameter spaced from said distal end, said trailing end tap diameter being greater than said leading end tap diameter; said leading end tap diameter being substantially equal to said leading end implant diameter.
Claim 2
Dependent Claim
260 words
A kit for placing an implant into a disk space between opposing vertebrae having opposing end plates to be separated by a predetermined degree of lordosis, said kit comprising: (A) an implant having: a generally frusto-conical hollow body having: a leading end a trailing end comprising: a trailing end rise a terminal end a longitudinal axis a first taper increasing from said leading end to said trailing end rise; and a second taper increasing from said terminal end to said terminal end rise said first taper of said frusto-conical body having a conical angle approximating said degree of lordosis; an implant thread pattern surrounding said body; openings formed through a conical wall of said body into an interior of said body with said openings formed at least on diametrically opposite sides of said body; said implant thread having a generally flat radial extremity in a surface of a cone defined by said implant thread; (B) a tap having; a shaft defining a longitudinal axis; a tapping head at a distal end of said shaft, said tapping head having a tapping thread surrounding said axis with a thread pattern substantially matching said implant thread pattern; said tapping thread includes a plurality of peaks and valleys defining a conical path around said axis with a leading end tap diameter adjacent said distal end and with a trailing end tap diameter spaced from said distal end, said trailing end tap diameter being greater than said leading end tap diameter; said leading end tap diameter being substantially equal to said leading end implant diameter.
Claim 3
Dependent Claim
34 words
A kit according to claim 1 wherein said tapping head includes a hollow body defining a tap interior; a plurality of channels for directing tapped debris from said tapping thread into said tap interior.
Claim 4
Dependent Claim
30 words
A kit according to claim 2 wherein said tapping thread includes a plurality of axially extending grooves through said thread, said channels formed through said grooves and into said interior.
Claim 5
Dependent Claim
14 words
A kit according to claim 2 wherein said channels are formed through said valleys.
Claim 6
Dependent Claim
19 words
A kit according to claim 2 wherein an axial end of said interior is closed at said distal end.
Claim 7
Dependent Claim
15 words
A kit according to claim 1 wherein said tapping thread has a sharp radial extremity.
Claim 8
Dependent Claim
35 words
A kit according to claim 1 further comprising a distraction spacer having: a rigid spacer body; said body having at least diametrically opposite exterior surfaces defining an angle substantially equal to said degree of lordosis.
Claim 9
Dependent Claim
289 words
A kit for placing an implant into a disk space between opposing vertebrae having opposing end plates to be separated by a predetermined degree of lordosis, said kit comprising: (A) an implant having; a generally frusto-conical hollow body having: a leading end a trailing end comprising: a trailing end rise a terminal end a longitudinal axis a first taper increasing from said leading end to said trailing end rise; and a second taper increasing from said terminal end to said terminal end rise; said first taper of said frusto-conical body having a conical angle approximating said degree of lordosis; an implant thread pattern surrounding said body; openings formed through a conical wall of said body into an interior of said body with said openings formed at least on diametrically opposite sides of said body; said implant thread having a generally flat radial extremity in a surface of a cone defined by said implant thread; said implant thread having a generally flat radial extremity in a surface of a cone defined by said implant thread; (B) a tap having: a shaft defining a longitudinal axis; a tapping head at a distal end of said shaft, said tapping head having a tapping thread surrounding said axis with a thread pattern substantially matching said implant thread pattern; said tapping thread includes a plurality of peaks and valleys defining a conical path around said axis with a leading end tap diameter adjacent said distal end and with a trailing end tap diameter spaced from said distal end, said tailing end tap diameter being greater than said leading end tap diameter; said leading end tap diameter being substantially equal to said leading end implant diameter; and said tapping thread having a sharp radial extremity.
Claim 10
Dependent Claim
289 words
A kit for placing an implant into a disk space between opposing vertebrae having opposing end plates to be separated by a predetermined degree of lordosis, said kit comprising: (A) an implant having; a generally frusto-conical hollow body having: a leading end a trailing end comprising: a trailing end rise a terminal end a longitudinal axis a first taper increasing from said leading end to said trailing end rise; and a second taper increasing from said terminal end to said terminal end rise; said first taper of said frusto-conical body having a conical angle approximating said degree of lordosis; an implant thread pattern surrounding said body; openings formed through a conical wall of said body into an interior of said body with said openings formed at least on diametrically opposite sides of said body; said implant thread having a generally flat radial extremity in a surface of a cone defined by said implant thread; said implant thread having a generally flat radial extremity in a surface of a cone defined by said implant thread; (B) a tap having: a shaft defining a longitudinal axis; a tapping head at a distal end of said shaft, said tapping head having a tapping thread surrounding said axis with a thread pattern substantially matching said implant thread pattern; said tapping thread includes a plurality of peaks and valleys defining a conical path around said axis with a leading end tap diameter adjacent said distal end and with a trailing end tap diameter spaced from said distal end, said tailing end tap diameter being greater than said leading end tap diameter; said leading end tap diameter being substantially equal to said leading end implant diameter; and said tapping thread having a sharp radial extremity.
Claim 11
Dependent Claim
34 words
A kit according to claim 8 wherein said tapping head includes a hollow body defining a tap interior; a plurality of channels for directing tapped debris from said tapping thread into said tap interior.
Claim 12
Dependent Claim
30 words
A kit according to claim 9 wherein said tapping thread includes a plurality of axially extending grooves through said thread, said channels formed through said grooves and into said interior.
Claim 13
Dependent Claim
14 words
A kit according to claim 9 wherein said channels are formed through said valleys.
Claim 14
Dependent Claim
19 words
A kit according to claim 9 wherein an axial end of said interior is closed at said distal end.
Claim 15
Dependent Claim
35 words
A kit according to claim 9 further comprising a distraction spacer having: a rigid spacer body; said body having at least diametrically opposite exterior surfaces defining an angle substantially equal to said degree of lordosis.
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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) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |