CA2222025A1 - Intervertebral disk stabilizer and instrument for reduction of spondylolisthesis - Google Patents

Intervertebral disk stabilizer and instrument for reduction of spondylolisthesis

Info

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
Application number
CA002222025A
Other languages
French (fr)
Other versions
CA2222025C (en
Inventor
Madhavan Pisharodi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27395462&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2222025(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US08/210,229 external-priority patent/US6093207A/en
Priority claimed from US08/475,211 external-priority patent/US5658336A/en
Priority claimed from US08/482,974 external-priority patent/US5697977A/en
Application filed by Individual filed Critical Individual
Publication of CA2222025A1 publication Critical patent/CA2222025A1/en
Application granted granted Critical
Publication of CA2222025C publication Critical patent/CA2222025C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

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    • 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.
CA002222025A 1994-03-18 1996-06-06 Intervertebral disk stabilizer and instrument for reduction of spondylolisthesis Expired - Fee Related CA2222025C (en)

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
US08/482,974 1995-06-07
US08/475,211 1995-06-07
US08/482,974 US5697977A (en) 1994-03-18 1995-06-07 Method and apparatus for spondylolisthesis reduction
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)

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US5782919A (en) 1995-03-27 1998-07-21 Sdgi Holdings, Inc. Interbody fusion device and method for restoration of normal spinal anatomy
US6245072B1 (en) 1995-03-27 2001-06-12 Sdgi Holdings, Inc. Methods and instruments for interbody fusion
US6206922B1 (en) * 1995-03-27 2001-03-27 Sdgi Holdings, Inc. Methods and instruments for interbody fusion
US6264655B1 (en) 1995-06-07 2001-07-24 Madhavan Pisharodi Cervical disk and spinal stabilizer
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MX9709599A (en) 1998-10-31

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