Devices and methods for treating bone

• US 8,894,652 B2
• Filed: 02/15/2012
• Issued: 11/25/2014
• Est. Priority Date: 08/29/2008
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Seifert, Jody L., Millhouse, Paul W., Calverley, Jamie, Boyer, Michael Lee II, Patel, Nirali, Ankney, David W., Adams, Mark
• Primary Examiner(s): BECCIA, CHRISTOPHER J
• Application Number:
  US13/396,846
• Publication Number:
  US 20120143194A1
• Time in Patent Office: 1,014 Days
• Field of Search: 606 79- 85, 606/86.A, 606/86.R, 623 1711- 1716
• US Class Current: 606/79
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/66 Alignment, compression or distraction mechanisms
• CPC Class Codes: A61B 17/7095 the filler comprising unlinked macroscopic particles
• CPC Class Codes: A61B 17/8805 for introducing fluid filler into bone or extracting it A61B17/7097, A61B17/8833 take precedence
• CPC Class Codes: A61B 17/8852 capable of being assembled or enlarged, or changing shape, inside the bone or disc
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30471 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2002/3052 unrestrained in only one direction, e.g. moving unidirectionally
• CPC Class Codes: A61F 2002/30556 for adjusting thickness
• CPC Class Codes: A61F 2002/30583 filled with hardenable fluid, e.g. curable in-situ
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30601 : telescopic
• CPC Class Codes: A61F 2002/4415 : elements of the prosthesis being arranged in a chain like manner

Abstract

A device is disclosed for reducing a vertebral compression fracture, comprising a superior end plate and an inferior end plate disposed along a vertical axis. The superior end plate and the inferior end plate are slidably separable in a vertical direction along the vertical axis. An interior chamber is provided in fluid communication with a port extending from an exterior to the interior chamber. The device is deployable within a vertebral body and expandable within the vertebral body by injecting a flowable material into the interior chamber thereby displacing the superior and inferior end plates along the vertical axis.

Claims

1. A cavity creation instrument comprising:

a cannula having a proximal end and a distal end; and

one or more cavity creation elements extendable from the cannula, the one or more cavity creation elements including a superior plate and an inferior plate disposed along a vertical axis, wherein the one or more cavity creation elements include a first low-profile configuration and a second expanded configuration in which the one or more cavity creation elements extend away from a body of the cannula to facilitate excavation of cancellous bone from an interior of a vertebral body and create a cavity,

wherein the one or more cavity creation elements are coupled to a rotating expansion screw,

wherein when the rotating expansion screw is actuated in a first direction, the one or more cavity creation elements extend away from the body and the superior plate and the inferior plate separate away from one another along the vertical axis and when the rotating expansion screw is actuated in a second direction, the one or more cavity creation elements extend toward the body and the superior plate and the inferior plate move toward one another along the vertical axis.

2. The instrument of claim 1, wherein the one or more cavity creation elements comprise bar members.

3. The instrument of claim 2, wherein the bar members are insertable within the cannula.

4. The instrument of claim 2, further comprising at least two bar members rotatably interlinked.

5. The instrument of claim 1, wherein the one or more cavity creation elements comprise L-shaped fingers.

6. The instrument of claim 5, wherein the instrument comprises at least two L-shaped fingers rotatably interlinked.

7. The instrument of claim 5, wherein the fingers are connected to an exterior of the cannula.

15. The instrument of claim 1, wherein the superior plate and the inferior plate each comprise planar surfaces for contacting the vertebral body.

16. The instrument of claim 1, wherein one or more nuts are positioned along the rotating expansion screw such that the instrument is expandable within the vertebral body by rotating the rotating expansion screw thereby displacing the superior and inferior plates along the vertical axis.

8. A cavity creation instrument comprising:

a cannula having a proximal end and a distal end; and

a superior plate and an inferior plate disposed along a vertical axis, and two or more bar members extendable outwardly from a distal end of the cannula, wherein the bar members include a first collapsed configuration such that the bar members are insertable through the cannula and a second expanded configuration

wherein the two or more bar members are coupled to a rotating expansion screw,

wherein when the rotating expansion screw is actuated in a first direction, the two or more bar members extend away from the body and the superior plate and the inferior plate separate away from one another along the vertical axis, and when the rotating expansion screw is actuated in a second direction, the two or more bar members extend toward the body and the superior plate and the inferior plate move toward one another along the vertical axis.

9. The instrument of claim 8, wherein the bar members are rotatably interlinked.

10. The instrument of claim 8, further comprising at least three bar members rotatably interlinked.

11. A cavity creation instrument comprising:

a cannula having a proximal end and a distal end;

a tubular member; and

two or more fingers operably attached to the tubular member, each of the two or more fingers having a first end, a second end, and a pivot point located between the first and the second end and rotatably coupled to the tubular member, wherein the fingers include a first retracted configuration whereby the fingers are oriented such that their bodies are substantially aligned with a body of the cannula and a second expanded configuration whereby the fingers extend outwardly to facilitate excavation of cancellous bone from an interior of a vertebral body and create a cavity,

wherein the two are more fingers are coupled to a rotating expansion screw,

wherein when the rotating expansion screw is actuated in a first direction, the two or more fingers extend away from the body and the first ends of the two or more fingers extend outside the tubular member and the second ends of the two or more fingers are positioned inside the tubular member, and when the rotating expansion screw is actuated in a second direction, the two or more fingers extend toward the body.

12. The instrument of claim 11, wherein the fingers are L-shaped.

13. The instrument of claim 11, wherein the fingers are rotatable.

14. The instrument of claim 11, wherein the fingers are independent and not connected to one another.

17. The instrument of claim 11, wherein the tubular member has an exterior portion and the two or more fingers are rotatably connected to the exterior portion of the tubular member.

18. The instrument of claim 11, wherein the tubular member having a first lateral side and a second lateral side and at least one of the two or more fingers is attached to the first lateral side and at least another of the two or more fingers is attached to the second lateral side.