CA2222025A1 - Intervertebral disk stabilizer and instrument for reduction of spondylolisthesis - Google Patents
Intervertebral disk stabilizer and instrument for reduction of spondylolisthesisInfo
- Publication number
- CA2222025A1 CA2222025A1 CA002222025A CA2222025A CA2222025A1 CA 2222025 A1 CA2222025 A1 CA 2222025A1 CA 002222025 A CA002222025 A CA 002222025A CA 2222025 A CA2222025 A CA 2222025A CA 2222025 A1 CA2222025 A1 CA 2222025A1
- Authority
- CA
- Canada
- Prior art keywords
- implant
- vertebrae
- adjacent vertebrae
- height
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/446—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
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Abstract
A middle expanded, removable disk im-plant (22) with substantially rectangular cross--sectional shape with a minimal height (H) and a width (W) greater than the height which is de-tachably mounted to an applicator (52) for in-sertion into the anatomical region between two adjacent vertebrae (16, 18) from which a por-tion of the intervertebral disk has been removed.
The implant is positioned by anterior-posterior movement in the disk space to the position in which both the expanded middle portion and the smaller diameter end (25, 36) portions of the im-plant engage the bodies (12, 14) of the adjacent vertebrae and then rotated to bring the sides (34) of the implant defining the height of the implant into engagement with the bodies of the adjacent vertebrae. A lock (24) is then secured to the im-plant to prevent further rotation thereof. In the event the adjacent vertebrae need to be aligned before fusion, an elongate implant (112) is pro-vided which is split longitudinally into side-by-side members (113, 114) movable relative to each other and which is inserted into the disk space between two misaligned vertebrae (133, 137). The members are provided with teeth (138) for engaging the adjacent vertebrae and the implant formed by the two side-by-side members is rectangularly-shaped in cross section, the height (H6) of the rectangularly-shaped cross section being less than the width (W6) so that the implant can be inserted between the adjacent vertebrae with the lesser, height dimension oriented in the same direction as the axis of the spinal column and the larger width dimension at approximately a right angle to that axis.
One member is then moved relative to the other from the first side-by-side position along the longitudinal axis of the implant to a second position in which the members are aligned with the respective, adjacent, misaligned vertebrae and the implant is rotated 90° to engage the teeth to the bodies of the adjacent vertebrae. The two members are then brought back into the first side-by-side position to draw the vertebrae into alignment and the implant is rotated approximately 90°
to disengage the teeth from the vertebrae for removal from the disk space.
The implant is positioned by anterior-posterior movement in the disk space to the position in which both the expanded middle portion and the smaller diameter end (25, 36) portions of the im-plant engage the bodies (12, 14) of the adjacent vertebrae and then rotated to bring the sides (34) of the implant defining the height of the implant into engagement with the bodies of the adjacent vertebrae. A lock (24) is then secured to the im-plant to prevent further rotation thereof. In the event the adjacent vertebrae need to be aligned before fusion, an elongate implant (112) is pro-vided which is split longitudinally into side-by-side members (113, 114) movable relative to each other and which is inserted into the disk space between two misaligned vertebrae (133, 137). The members are provided with teeth (138) for engaging the adjacent vertebrae and the implant formed by the two side-by-side members is rectangularly-shaped in cross section, the height (H6) of the rectangularly-shaped cross section being less than the width (W6) so that the implant can be inserted between the adjacent vertebrae with the lesser, height dimension oriented in the same direction as the axis of the spinal column and the larger width dimension at approximately a right angle to that axis.
One member is then moved relative to the other from the first side-by-side position along the longitudinal axis of the implant to a second position in which the members are aligned with the respective, adjacent, misaligned vertebrae and the implant is rotated 90° to engage the teeth to the bodies of the adjacent vertebrae. The two members are then brought back into the first side-by-side position to draw the vertebrae into alignment and the implant is rotated approximately 90°
to disengage the teeth from the vertebrae for removal from the disk space.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/210,229 US6093207A (en) | 1994-03-18 | 1994-03-18 | Middle expanded, removable intervertebral disk stabilizer disk |
US08/475,211 US5658336A (en) | 1994-03-18 | 1995-06-07 | Rotating, locking, middle-expanded intervertebral disk stabilizer |
US08/475,211 | 1995-06-07 | ||
US08/482,974 US5697977A (en) | 1994-03-18 | 1995-06-07 | Method and apparatus for spondylolisthesis reduction |
US08/482,974 | 1995-06-07 | ||
PCT/US1996/009114 WO1996040016A2 (en) | 1994-03-18 | 1996-06-06 | Intervertebral disk stabilizer and instrument for reduction of spondylolisthesis |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2222025A1 true CA2222025A1 (en) | 1996-12-19 |
CA2222025C CA2222025C (en) | 2007-11-27 |
Family
ID=27395462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002222025A Expired - Fee Related CA2222025C (en) | 1994-03-18 | 1996-06-06 | Intervertebral disk stabilizer and instrument for reduction of spondylolisthesis |
Country Status (9)
Country | Link |
---|---|
US (1) | US5653762A (en) |
EP (1) | EP0830116B1 (en) |
JP (1) | JP3761196B2 (en) |
CN (1) | CN1134243C (en) |
AU (1) | AU6090096A (en) |
CA (1) | CA2222025C (en) |
DE (1) | DE69623616T2 (en) |
ES (1) | ES2182985T3 (en) |
WO (1) | WO1996040016A2 (en) |
Families Citing this family (300)
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US7879095B2 (en) * | 1994-03-18 | 2011-02-01 | Madhavan Pisharodi | Method of inserting, rotating and releasing a spring-loaded artificial disk |
US5893890A (en) * | 1994-03-18 | 1999-04-13 | Perumala Corporation | Rotating, locking intervertebral disk stabilizer and applicator |
US5782919A (en) | 1995-03-27 | 1998-07-21 | Sdgi Holdings, Inc. | Interbody fusion device and method for restoration of normal spinal anatomy |
US6206922B1 (en) * | 1995-03-27 | 2001-03-27 | Sdgi Holdings, Inc. | Methods and instruments for interbody fusion |
US6245072B1 (en) * | 1995-03-27 | 2001-06-12 | Sdgi Holdings, Inc. | Methods and instruments for interbody fusion |
US6264655B1 (en) | 1995-06-07 | 2001-07-24 | Madhavan Pisharodi | Cervical disk and spinal stabilizer |
US20080215058A1 (en) | 1997-01-02 | 2008-09-04 | Zucherman James F | Spine distraction implant and method |
US6068630A (en) | 1997-01-02 | 2000-05-30 | St. Francis Medical Technologies, Inc. | Spine distraction implant |
US7201751B2 (en) | 1997-01-02 | 2007-04-10 | St. Francis Medical Technologies, Inc. | Supplemental spine fixation device |
US7306628B2 (en) | 2002-10-29 | 2007-12-11 | St. Francis Medical Technologies | Interspinous process apparatus and method with a selectably expandable spacer |
US20080086212A1 (en) | 1997-01-02 | 2008-04-10 | St. Francis Medical Technologies, Inc. | Spine distraction implant |
US7959652B2 (en) | 2005-04-18 | 2011-06-14 | Kyphon Sarl | Interspinous process implant having deployable wings and method of implantation |
ES2150405T1 (en) | 1997-04-25 | 2000-12-01 | Stryker France Sa | INTERSOMATIC IMPLANTS IN TWO PARTS. |
EP1009338B1 (en) * | 1997-08-27 | 2006-10-04 | Regeneration Technologies, Inc. | Cortical bone cervical smith-robinson fusion implant |
US5865848A (en) * | 1997-09-12 | 1999-02-02 | Artifex, Ltd. | Dynamic intervertebral spacer and method of use |
FR2769827B1 (en) * | 1997-10-17 | 2000-05-19 | Sdm | IMPLANT FOR INTERSOMATIC SPINAL ARTHRODESIS |
DE19803700A1 (en) * | 1998-01-30 | 1999-08-19 | Koenigsee Implantate & Instr | Height-adjustable vertebral implant |
WO1999052453A2 (en) * | 1998-04-09 | 1999-10-21 | Sdgi Holdings, Inc. | Method and instrumentation for vertebral interbody fusion |
US6428541B1 (en) | 1998-04-09 | 2002-08-06 | Sdgi Holdings, Inc. | Method and instrumentation for vertebral interbody fusion |
US7776046B2 (en) | 1998-04-09 | 2010-08-17 | Warsaw Orthopedic, Inc. | Method and instrumentation for vertebral interbody fusion |
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- 1996-06-06 DE DE69623616T patent/DE69623616T2/en not_active Expired - Fee Related
- 1996-06-06 EP EP96918186A patent/EP0830116B1/en not_active Expired - Lifetime
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US5653762A (en) | 1997-08-05 |
CA2222025C (en) | 2007-11-27 |
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MX9709599A (en) | 1998-10-31 |
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