US5573537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for probing and reaming a pedicle
Assignee: Individual
•
Filing: 1995-02-10
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Granted: 1996-11-12
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Expires: 2015-02-10
Abstract
Abstract A unitary instrument for providing a step-down screw hole in a pedicle is provided. The tool includes an end member for rotatable connection with a power source, the probe for providing a pilot hole in the pedicle and a side-cutting reamer member for providing an anchor hole for a pedicle screw positioned about the pilot hole. The arrangement is such that the instrument is self-centering in part due to the presence of the probe in the pilot hole.
Inventors
- 👤 Chaim Rogozinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1671; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7074; A61B17/7092; A61B90/00; A61B90/06; A61B2090/062; A61B90/39; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/905; Y10T408/906; Y10T408/9065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
226 words
A method for providing a screw hole in a pedicle, said pedicle having a relatively hard cortical outer portion and a relatively soft cancellous inner portion wherein said method comprises: (i) providing a unitary instrument, said instrument having (a) an elongated probe member, (b) a side-cutting reamer member, and (c) an end member for rotatable connection to a rotating power source wherein said side-cutting reamer member is positioned between said probe member and said end member, and wherein said probe member, said reamer member and said end member rotate as a unit when said end member is operatively connected to an activated rotating power source; (ii) identifying a location for a screw hole on the surface of said relatively hard cortical outer portion of said pedicle; (iii) providing, at said location for a screw hole, an opening for said probe member in said relatively hard cortical outer portion of said pedicle; (iv) introducing said probe member into said opening and urging said probe member to penetrate said relatively soft cancellous inner portion of said pedicle; and (v) rotating said unitary instrument, wherein probe and reamer member are self-centered to provide a screw hole in said pedicle, said self-centering being consequent from deflection, as said rotating proceeds, by said relatively hard outer cortical portion of said pedicle, of said elongated probe member and said side-cutting reamer member.
Claim 2
Independent Claim
226 words
A method for providing a screw hole in a pedicle, said pedicle having a relatively hard cortical outer portion and a relatively soft cancellous inner portion wherein said method comprises: (i) providing a unitary instrument, said instrument having (a) an elongated probe member, (b) a side-cutting reamer member, and (c) an end member for rotatable connection to a rotating power source wherein said side-cutting reamer member is positioned between said probe member and said end member, and wherein said probe member, said reamer member and said end member rotate as a unit when said end member is operatively connected to an activated rotating power source; (ii) identifying a location for a screw hole on the surface of said relatively hard cortical outer portion of said pedicle; (iii) providing, at said location for a screw hole, an opening for said probe member in said relatively hard cortical outer portion of said pedicle; (iv) introducing said probe member into said opening and urging said probe member to penetrate said relatively soft cancellous inner portion of said pedicle; and (v) rotating said unitary instrument, wherein probe and reamer member are self-centered to provide a screw hole in said pedicle, said self-centering being consequent from deflection, as said rotating proceeds, by said relatively hard outer cortical portion of said pedicle, of said elongated probe member and said side-cutting reamer member.
Claim 3
Dependent Claim
129 words
A unitary surgical instrument for providing a screw hole in a human pedicle, said pedicle having a relatively hard cortical outer portion and a relatively soft cancellous inner portion, said instrument having: (a) an elongated probe member sized for penetration of said soft cancellous inner portion of said pedicle, (b) a side-cutting reamer member sized to define a portion of said screw hole in said relatively hard cortical outer portion of said pedicle, and (c) an end member for rotatable connection to a rotating power source, wherein said unitary instrument is self-centering as said unitary surgical instrument is rotated to provide said screw hole, said self-centering being consequent from deflection, by said relatively hard cortical outer portion of said pedicle, of said elongated probe member and said reamer member.
Claim 4
Dependent Claim
129 words
A unitary surgical instrument for providing a screw hole in a human pedicle, said pedicle having a relatively hard cortical outer portion and a relatively soft cancellous inner portion, said instrument having: (a) an elongated probe member sized for penetration of said soft cancellous inner portion of said pedicle, (b) a side-cutting reamer member sized to define a portion of said screw hole in said relatively hard cortical outer portion of said pedicle, and (c) an end member for rotatable connection to a rotating power source, wherein said unitary instrument is self-centering as said unitary surgical instrument is rotated to provide said screw hole, said self-centering being consequent from deflection, by said relatively hard cortical outer portion of said pedicle, of said elongated probe member and said reamer member.
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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) | 1999-11-12 | 2000-05-13 | 2000-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-12 | 2004-05-13 | 2004-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-12 | 2008-05-13 | 2008-11-12 | $7700.00 | Window Closed / Lapsed |