Intervertebral stabilising device

• US 7,291,150 B2
• Filed: 12/01/2000
• Issued: 11/06/2007
• Est. Priority Date: 12/01/1999
• Status: Expired due to Fees

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: SDGI Holdings Incorporated (Medtronic Plc)
• Inventors: Graf, Henry
• Primary Examiner(s): Robert; Eduardo C.
• Assistant Examiner(s): Ramana; Anuradha
• Application Number:
  US10/148,693
• Publication Number:
  US 20030055427A1
• Time in Patent Office: 2,531 Days
• Field of Search: 623/11.11, 623/16.11, 623/17.11, 623/17.12, 623/17.13, 623/17.15, 623/17.14, 623/17.16, 606/60, 606/61, 188379-380, 267 33- 35, 267/64.16, 267/64.17, 267/136, 267/140, 267/152, 267/153
• US Class Current: 606/86.00A
• CPC Class Codes: A61B 17/7004 with a cross-section which varies along its length A61B17/7019 takes precedence
• CPC Class Codes: A61B 17/7005 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
• CPC Class Codes: A61B 17/7025 with a sliding joint
• CPC Class Codes: A61F 2/4405 for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes devices implanted between spinous or transverse processes A61B17/7062
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4425 made of articulated components
• CPC Class Codes: A61F 2/48 Operating or control means, e.g. from outside the body, control of sphincters
• CPC Class Codes: A61F 2002/30069 elastomeric
• CPC Class Codes: A61F 2002/302 toroidal, e.g. rings
• CPC Class Codes: A61F 2002/30242 spherical
• CPC Class Codes: A61F 2002/30448 using adhesives
• CPC Class Codes: A61F 2002/30563 having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30566 Helical springs
• CPC Class Codes: A61F 2002/30584 filled with gas
• CPC Class Codes: A61F 2002/30586 having two or more inflatable pockets or chambers
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30624 Hinged joint, e.g. with transverse axle restricting the movement
• CPC Class Codes: A61F 2002/30639 having rolling elements between both articulating surfaces
• CPC Class Codes: A61F 2002/30642 having a single rolling (or sliding) ball articulating between two cups
• CPC Class Codes: A61F 2002/443 : having two transversal endplates and at least one intermediate component
• CPC Class Codes: A61F 2002/444 : for replacing the nucleus pulposus
• CPC Class Codes: A61F 2002/4485 : comprising three or more adjacent spinal implants
• CPC Class Codes: A61F 2220/005 : using adhesives
• CPC Class Codes: A61F 2230/0065 : toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/0071 : spherical
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

The invention concerns a device comprising an implant (18) designed to be inserted at least partially between the vertebral bodies (4, 4′) of two neighbouring vertebrae, said implant (18) being adapted to provide to said neighbouring vertebral bodies (4, 4′) at least one degree of mutual freedom, said device further comprising at least an extra-discal member (20), arranged behind the intervertebral space (12), adapted to damp a movement between said vertebrae (2, 2′), at least in the intervertebral flexion direction.

Claims

1. An intervertebral stabilization device, comprising:

an implant having two chambers, the implant being operable to be inserted at least partially between two vertebral bodies and maintain at least one mutual degree of freedom of the vertebral bodies when inserted therebetween;

an extra-discal member having two chambers separated by a piston and being operable to be disposed posterior to said implant when said implant is at least partially positioned between the vertebral bodies, the extra-discal member being configured to dampen displacement between the vertebral bodies at least in an intervertebral flexion direction when disposed posterior to said implant;

said chambers of said implant and said chambers of the extra-discal member containing a fluid; and

wherein the device further comprises means for placing said chambers of said implant and said chambers of said extra-discal member in fluidic communication said means including a first conduit providing fluid communication between one of said chambers of said implant and one of said chambers of said extra-discal member in a first direction and a second conduit providing fluid communication between another of said chambers of said implant and another of said chambers of said extra-discal member in a second direction.

2. A device according to claim 1, further comprising a deformable chamber wall.

3. An intervertebral stabilization device, comprising:

an implant having two chambers separated by a porous element, the implant being operable to be inserted at least partially between two vertebral bodies and maintain at least one mutual degree of freedom of the vertebral bodies when inserted therebetween;

an extra-discal member having two chambers separated by a piston and being operable to be disposed posterior to said implant when said implant is at least partially positioned between the vertebral bodies, the extra-discal member being configured to dampen displacement between the vertebral bodies at least in an intervertebral flexion direction when the extra-discal member is disposed posterior to said implant;

said chambers of said implant and said chambers of said extra-discal member containing a fluid; and

wherein the device further comprises means for placing said chambers of said implant and said chambers of said extra-discal member in fluidic communication, said means including a first conduit providing fluid communication between one of said chambers of said implant and one of said chambers of said extra-discal member in a first direction and a second conduit providing fluid communication between another of said chambers of said implant and another of said chambers of said extra-discal member in a second direction.

4. A device according to claim 3, further comprising a deformable chamber wall.