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US6551320: Method and apparatus for correcting spinal deformity

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Filing Information

Inventor(s) Isador H. Lieberman ·
Assignee(s) The Cleveland Clinic Foundation ·
Attorney/Agent(s) Tarolli, Sundheim, Covell & Tummino L.L.P. ·
Primary Examiner John J. Wilson ·
Application Number US9899669
Filing date 07/05/2001
Issue date 04/22/2003
Prior Publication Data
Predicted expiration date 11/08/2020
U.S. Classifications 606/61  · 606/86  ·
International Classifications --
Kind CodeB2
International Classifications 606 61 · 606 69 · 606 70 · 606 71 · 606 72 · 606 86 ·
Related U.S. Application DataRELATED APPLICATIONS
This application is a continuation-in-part of co-pending U.S. patent application Ser. No. 09/812,085, filed Mar. 19, 2001, which is itself a continuation-in-part of co-pending U.S. patent application Ser. No. 09/781,847, filed Feb. 14, 2001, which is itself a continuation-in-part of co-pending U.S. patent application Ser. No. 09/708,940, filed Nov. 8, 2000, and Ser. No. 09/708,292, filed Nov. 8, 2000, now U.S. Pat. No. 6,468,309. The entire subject matter of the aforementioned four co-pending applications is incorporated herein by reference.
38 Claims, 19 Drawings


Abstract

An apparatus (10) for correcting spinal deformity comprises at least one anchor (20) for implantation into a vertebral body (90). The anchor (20) includes a platform (24) having a first surface (38) for facing the vertebral body (90). The anchor (20) further includes screw means (50 and 52) for embedding into the vertebral body (90) upon rotation of the platform (24). The platform (24) includes at least one passage (44) extending transversely through the platform. The passage (44) receives a cable (120) connected with another anchor (20) in another vertebral body (92). The cable (120) is tensioned to cause relative movement between the vertebral bodies (90 and 92) and thereby correct the spinal deformity. Additional cables (150, 170) may be connected to the anchors (20) and tensioned to achieve correction in multiple planes.

Independent Claims | See all claims (38)

  1. 1. An apparatus for correcting spinal deformity, said apparatus comprising: at least one anchor for implantation into a vertebral body, said at least one anchor, when implanted, being resistant to toggling in the vertebral body and to being pulled from the vertebral body; said at least one anchor including a platform having a first surface for facing the vertebral body, said platform including at least one passage extending transversely through said platform, said at least one passage for receiving a cable connected with another vertebral body; said at least one anchor further including at least one helical spike for embedding into the vertebral body upon rotation of said platform, said at least one helical spike projecting from said first surface on said platform and extending around a longitudinal axis, said at least one helical spike having a tip portion at a distal end which penetrates into the vertebral body as said platform is rotated; said platform including a plurality of parallel passages extending transversely through said platform and an oppositely disposed pair of radially extending wing sections, one of said plurality of parallel passages extending through each of said pair of wing sections.
  2. 8. An apparatus for correcting spinal deformity, said apparatus comprising: first and second anchors for implantation into first and second vertebral bodies, respectively, said anchors, when implanted, being resistant to toggling in the vertebral bodies and to being pulled from the vertebral bodies; each of said first and second anchors including a platform having at least one passage extending transversely through said platform; each of said first and second anchors further including screw means for embedding into one of the vertebral bodies upon rotation of said platform, said screw means projecting from said platform on each of said first and second anchors and having a tip portion at a distal end which penetrates into a respective one of the vertebral bodies as said platform is rotated; and at least one cable extending through said at least one passage in said platform on each of said first and second anchors, said at least one cable being tensionable to cause relative movement between the first and second vertebral bodies; said platform on each of said first and second anchors including a plurality of parallel passages extending transversely through said platform; said platform on each of said first and second anchors further including an oppositely disposed pair of radially extending wing sections, one of said plurality of parallel passages extending through each of said pair of wing sections on each of said first and second anchors.
  3. 13. An apparatus for correcting spinal deformity, said apparatus comprising: at least two anchors for implantation into separate vertebral bodies, said at least two anchors, when implanted, being resistant to toggling in the vertebral bodies and to being pulled from the vertebral bodies; each of said at least two anchors including a platform having at least one passage extending transversely through said platform; each of said at least two anchors further including at least two helical spikes for embedding into one of the vertebral bodies upon rotation of said platform, said at least two helical spikes projecting from said platform on each of said at least two anchors and having tip portions at a distal end which penetrate into a respective one of the vertebral bodies as said platform is rotated; at least one cable extending through said at least one passage in said platform on each of said at least two anchors, said at least one cable being tensionable to cause relative movement between the vertebral bodies; and a spinal fixation implant extending between and is connectable with said platform on each of said at least two anchors.
  4. 20. A method for correcting spinal deformity, said method comprising the steps of: providing at least two anchors for implantation into separate vertebral bodies, each of the at least two anchors including a platform having at least one passage extending transversely through the platform, each of the at least two anchors further including screw means for embedding into one of the vertebral bodies upon rotation of the platform; implanting the at least two anchors in the separate vertebral bodies; connecting the at least two anchors with at least one cable that extends through the at least one passage in the platform on each of the at least two anchors; tensioning the at least one cable to cause relative movement between the vertebral bodies; and connecting a spinal fixation implant to the platform on each of the at least two anchors.
  5. 21. A method for correcting spinal deformity, said method comprising the steps of: providing at least two anchors for implantation into separate vertebral bodies, each of the at least two anchors including a platform having at least one passage extending transversely through the platform, each of the at least two anchors further including screw means for embedding into one of the vertebral bodies upon rotation of the platform; implanting the at least two anchors in the separate vertebral bodies; connecting the at least two anchors with at least one cable that extends through the at least one passage in the platform on each of the at least two anchors; and tensioning the at least one cable to cause relative movement between the vertebral bodies; the platform on each of the at least two anchors including a plurality of parallel passages extending transversely through the platform, the platform on each of the at least two anchors further including an oppositely disposed pair of radially extending wing sections, one of the plurality of parallel passages extending through each of the pair of wing sections on each of the at least two anchors.
  6. 25. An apparatus for correcting spinal deformity, said apparatus comprising: at least one anchor for implantation into a vertebral body, said at least one anchor having a longitudinal axis and, when implanted, being resistant to toggling in the vertebral body and to being pulled from the vertebral body; said at least one anchor including a platform having a first surface for facing the vertebral body, said first surface being solid and extending generally transverse to said longitudinal axis, said platform including at least one passage extending transversely through said platform, said at least one passage for receiving a cable connected with another vertebral body; said at least one anchor further including at least one helical spike for embedding into the vertebral body upon rotation of said platform, said at least one helical spike projecting tangentially from said first surface on said platform and extending around said longitudinal axis, said at least one helical spike having a tip portion at a distal end which penetrates into the vertebral body as said platform is rotated.
  7. 36. An apparatus for correcting spinal deformity, said apparatus comprising: first and second anchors for implantation into first and second vertebral bodies, respectively, said anchors, when implanted, being resistant to toggling in the vertebral bodies and to being pulled from the vertebral bodies; each of said first and second anchors having a longitudinal axis and including a platform having at least one passage extending transversely through said platform, each of said platforms having a first surface that is solid and that extends generally transverse to said longitudinal axis; each of said first and second anchors further including at least two helical spikes for embedding into one of the vertebral bodies upon rotation of said platform, said at least two helical spikes projecting tangentially from said first surface platform on each of said first and second anchors and having a tip portion at a distal end which penetrates into a respective one of the vertebral bodies as said platform is rotated; and at least one cable extending through said at least one passage in said platform on each of said first and second anchors, said at least one cable being tensionable to cause relative movement between the first and second vertebral bodies.

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Other Publications

An article entitled “Anterior Vertebral Body Screw Pullout Testing, A Comparison of Zielke, Kaneda, Universal Spine System, and Universal Spine System with Pullout-Resistant Nut”, by Isador H. Lieberman et al., reprinted from SPINE, vol. 23, No. 8, Apr. 15, 1998.
An excerpt from
An excerpt from
An excerpt from

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