Expandable support device and method of use

• US 8,382,842 B2
• Filed: 05/14/2010
• Issued: 02/26/2013
• Est. Priority Date: 05/14/2009
• Status: Active Grant

• Current Assignee: Nuvasive Incorporated
• Original Assignee: Stout Medical Group, L.P. (Alphatec Holdings Incorporated)
• Inventors: Romano, John-Paul, Greenhalgh, E. Skott
• Primary Examiner(s): Truong, Kevin T
• Assistant Examiner(s): SEVILLA, CHRISTIAN ANTHONY
• Application Number:
  US12/780,744
• Publication Number:
  US 20100292796A1
• Time in Patent Office: 1,019 Days
• Field of Search: 623 1711- 1716
• US Class Current: 623/17.16
• CPC Class Codes: A61B 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2817 Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• 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 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30082 radioactive
• CPC Class Codes: A61F 2002/3037 Translation along the common longitudinal axis, e.g. piston
• CPC Class Codes: A61F 2002/30372 with additional means for limiting said translation
• CPC Class Codes: A61F 2002/30383 made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
• CPC Class Codes: A61F 2002/30403 Longitudinally-oriented cooperating ribs and grooves on mating lateral surfaces of a mainly longitudinal connection
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30518 with possibility of relative movement between the prosthetic parts
• 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 2002/30579 with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/30828 parallel
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2210/0095 : radioactive
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2250/0009 : for adjusting thickness
• CPC Class Codes: A61F 2250/0098 : radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• 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
• CPC Class Codes: A61F 2310/00071 : Nickel or Ni-based alloys
• CPC Class Codes: A61F 2310/00083 : Zinc or Zn-based alloys
• CPC Class Codes: A61F 2310/00101 : Molybdenum or Mo-based alloys
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00137 : Tungsten or W-based alloys
• CPC Class Codes: A61F 2310/00155 : Gold or Au-based alloys
• CPC Class Codes: A61F 2310/00353 : Bone cement, e.g. polymethylmethacrylate or PMMA
• CPC Class Codes: A61F 2310/00365 : Proteins; Polypeptides; Degradation products thereof
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF

Abstract

An expandable support device for tissue repair is disclosed. The device can be used to repair hard or soft tissue, such as bone or vertebral discs. A method of repairing tissue is also disclosed. The device and method can be used to treat compression fractures. The compression fractures can be in the spine. The device can be deployed by compressing the device longitudinally resulting in radial expansion.

Claims

1. An expandable implant device comprising an intervertebral spacer comprising:

a first load-bearing element;

a second load-hearing element;

a sliding element slidably attached to the first load-hearing element and the second load-bearing element,

wherein the sliding element has first and second sliding element ramps and

wherein the first load-bearing element has first and second load bearing ramps, and

wherein the first and second sliding element ramps are configured to press against the first and second load-bearing ramps, respectively, when the sliding element is translated with respect to the first load-hearing element, and

wherein the translation of the sliding element with respect to the first load-bearing element causes the first load-bearing element to move away from the second load-bearing element, and

wherein the first load-bearing element and the second load-bearing element and the sliding element have respective centrally located openings therethrough, and the respective openings at least partially align with each other along a direction from the first load-bearing element to the second load-bearing element.

2. The device of claim 1, wherein the first sliding element ramp has a first tooth configured to allow unidirectional sliding against the first load-bearing element.

3. The device of claim 2, wherein the first load-bearing ramp is configured to allow unidirectional sliding against the first sliding element.

4. The device of claim 1. higher comprising a locking pin.

5. The device of claim 4, wherein the locking, pin is attached to the first load-bearing element.

6. The device of claim 4, wherein the locking pin is attached to the sliding element.

7. The device of claim 1, wherein the first load-bearing element has a third load-bearing ramp.

8. The device of claim 1, wherein the sliding element has a third sliding element ramp.