ARTIFICIAL TOTAL LUMBAR DISC FOR UNILATERAL SAFE AND SIMPLE POSTERIOR PLACEMENT IN THE LUMBAR SPINE, AND REMOVEABLE BIFUNCTIONAL SCREW WHICH DRIVES VERTICAL SLIDING EXPANSILE PLATE EXPANSION, AND INTERPLATE WIDENING, AND ANGLED TRACTION SPIKES

• US 20110288646A1
• Filed: 09/23/2010
• Published: 11/24/2011
• Est. Priority Date: 04/04/2006
• Status: Active Grant

• Current Assignee: Moskowitz Family LLC
• Original Assignee: Moskowitz Family LLC
• Inventors: Moskowitz, Mosheh T., Moskowitz, Nathan, Glozman, Daniel
• Granted Patent: US 10,130,493 B2
• Time in Patent Office: Days
• US Class Current: 623/17.16
• 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 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30242 spherical
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30525 Worm gears
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30556 for adjusting thickness
• CPC Class Codes: A61F 2002/30579 with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30663 multiaxial, e.g. biaxial; multipolar, e.g. bipolar or having an intermediate shell articulating between the ball and the socket
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/4622 having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4628 with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0071 spherical
• CPC Class Codes: A61F 2250/0006 for adjusting angular orientation
• CPC Class Codes: A61F 2250/0009 for adjusting thickness
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

Abstract

A total artificial expansile disc and a method for posterior insertion between a pair of vertebral endplates are disclosed. The total artificial expansile disc includes at least one pair of substantially parallel plates that move apart along a first axis, in order to occupy a space defined by the vertebral endplates. In another embodiment, each of substantially parallel plates includes a first plate and a second sliding plate. An expansion device or tool is used to move the substantially parallel pair of plates apart along the first axis. A core is disposed between the pair of plates, and the core permits the vertebral endplates to move relative to one another. A ball limiter or ball extender prevents the core from being extruded from between the substantially parallel plates.

Claims

1-20. -20. (canceled)

21. A tool for posteriorly inserting a total artificial expansile disc between vertebral endplates, said total artificial expansile disc including a pair of plates with first alignment members and with a plurality of spikes, comprising:

a pair of manipulators each having a cradle for each of said plates, said cradles including second alignment members for cooperating with the first alignment members of the plates; and

a wedge separator disposed between said pair of manipulators;

wherein the tool is used to posteriorly insert the pair of plates, disposed in the cradles of the separators, between a pair of vertebral endplates;

wherein said wedge separator is used to separate said pair of plates; and

wherein the manipulators force the spikes of said plates into the vertebral end plates.

22. The tool for posteriorly inserting a total artificial expansile disc according to claim 21 wherein the separators include digit inserts for operator of the tool.

23. The tool for posteriorly inserting a total artificial expansile disc according to claim 22 wherein the wedge separator is attached by a transmission linkage to one of the manipulators.

24. A total artificial expansile disc, comprising:

a pair of substantially parallel plates, that move apart along a first axis, in order to occupy a space defined by vertebral endplates, each of said parallel plates including a first plate and a second sliding plate that moves along a second axis that is perpendicular to the first axis;

an expansion device that causes movement of the pair of plates along the first axis and the second axis;

a core, disposed between the pair of plates, that permits the vertebral endplates to move relative to one another; and

a limiter which prevents the core from being extruded from between the substantially parallel plates,

wherein the core includes at least one of;

a pair of overhangs at the top and bottom of the core, and

an ellipsoidal shaped member having superior and inferior domes.

25. The total artificial expansile disc according to claim 24, wherein the limiter includes a substantially ring shaped member having a raised edge, and the core is disposed within said limiter.

26. The total artificial expansile disc according to claim 25, wherein the limiter includes at least a first substantially ring shaped member having a raised edge, and the core is disposed within said limiter.

27. The total artificial expansile disc according to claim 26, wherein the limiter includes a second substantially ring shaped member,

wherein said first and second substantially ring shaped members include raised barriers that prevent extrusion of the core.

28. The total artificial expansile disc according to claim 24, wherein the core includes the pair of overhangs at the top and bottom of the core, and

wherein the overhangs of the core are ensconced within the two ring shaped members of said limiter.

29. The total artificial expansile disc according to claim 28, wherein each of the pair of substantially parallel plates includes a trough disposed in a center of the pair of substantially parallel plates.

30. The total artificial expansile disc according to claim 27, wherein the first and second substantially ring shaped members rotate with respect to each other and at least one of the substantially ring shaped members fits into a groove formed in the core.

31. The total artificial expansile disc according to claim 30, wherein the groove is formed in the exterior periphery of the core.

32. The total artificial expansile disc according to claim 24, wherein the limiter includes two substantially ring shaped members, wherein the core includes a pair of overhangs at the top and bottom of the core, and wherein the overhangs of the core are ensconced within the two ring shaped members of said limiter.

33. The total artificial expansile disc according to claim 32, which further includes a trough disposed in the center of each parallel plate.

34. The total artificial expansile disc according to claim 31, wherein the substantially parallel plates include alignment holes.

35. The total artificial expansile disc according to claim 24, wherein the substantially parallel plates include an array of spikes, said spikes include pyramidal spikes disposed at the periphery of the plates, at least one conical spike disposed in the center of the plates and angled spikes surrounding the conical spike.

36. A tool for posteriorly inserting a total artificial expansile disc between a pair of vertebral endplates,

said total artificial expansile disc including:

a pair of substantially parallel plates, that move apart along a first axis, in order to occupy a space defined by vertebral endplates, each of said parallel plates including a first plate and a second sliding plate that moves along a second axis that is perpendicular to the first axis;

an expansion device that causes movement of the pair of plates along the first axis and the second axis;

a core, disposed between the pair of plates, that permits the vertebral endplates to move relative to one another; and

a limiter which prevents the core from being extruded from between the substantially parallel plates,

wherein each of the pair of substantially parallel plates includes first alignment members and a plurality of spikes,

the tool comprising;

a pair of manipulators each having a cradle for each of said plates, said cradles including second alignment members for cooperating with the first alignment members of the plates; and

a wedge separator disposed between said pair of manipulators;

wherein the tool is used to posteriorly insert the pair of plates, disposed in the cradles of the separators, between the pair of vertebral endplates;

wherein said wedge separator is used to separate said pair of plates; and

wherein the manipulators force the spikes of said plates into the vertebral end plates.

37. The tool according to claim 36, wherein the separators include digit inserts for an operator of the tool.

38. The tool according to claim 37, wherein the wedge separator is attached by a transmission linkage to one of the manipulators.