Methods and apparatuses for bone restoration

• US 10,813,771 B2
• Filed: 09/10/2018
• Issued: 10/27/2020
• Est. Priority Date: 06/09/2004
• Status: Active Grant

• Current Assignee: Stryker European Operations Limited (Stryker Corporation)
• Original Assignee: Vexim SAS
• Inventors: Oglaza, Jean-Francois, Renaud, Christian, Leonard, Alain, Huet, Gildas
• Primary Examiner(s): Hammond, Ellen C
• Assistant Examiner(s): Carter, Tara Rose E
• Application Number:
  US16/126,371
• Publication Number:
  US 20190008653A1
• Time in Patent Office: 778 Days
• CPC Class Codes: A61B 17/70 Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
• CPC Class Codes: A61B 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30224 cylindrical
• 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 2002/30556 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 2002/30601 telescopic
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30774 internally-threaded
• 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 2002/4629 connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4635 using minimally invasive surgery
• CPC Class Codes: A61F 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0069 : cylindrical
• 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

Abstract

Methods and apparatuses for restoration of human or bone anatomy, which may include introduction, into a bone of an expansible implant capable of expansion in a single determined plane, positioning the expansible implant in the bone in order to correspond the single determined plane with a bone restoration plane and opening our the expansible implant in the bone restoration plane. A first support surface and a second support surface spread tissues within bone. The embodiments of the invention may also include injecting a filling material around the implant.

Claims

1. A method for restoration of a human or animal vertebral body comprising:

implanting an implant into a vertebral body in a collapsed position, wherein the implant comprises a first end element and a second end element positioned such that first and second plates of the implant are located between the first end element and the second end element when the implant is in the collapsed position;

with the implant coupled to an implant carrier such that the implant carrier abuts the second end element and with a rod extending through an opening of the second end element and engaging the first end element, translating the rod relative to the implant carrier to move the first and second plates of the implant in opposite directions of each other and orthogonal to a longitudinal axis of the implant, wherein the first end element and the second end element become closer to one another as the first and second plates move in the opposite directions; and

injecting a filling material through one of the first end element and the second end element of the implant and into a cavity.

2. The method according to claim 1, wherein the first plate and the second plate, when expanded, respectively form a first support surface and a second support surface in the vertebral body.

3. The method according to claim 1, wherein the implant is substantially symmetrical about a central axis perpendicular to the longitudinal axis and bisecting the implant before, during and after moving the first and second plates of the implant in the opposite directions.

4. The method according to claim 1, further comprising actuating a locking device adapted to control whether the rod is rotatable about its longitudinal axis.

5. The method according to claim 1, wherein the implant carrier is coupled to a gripping block and the rod is threadably coupled to a handle, said method further comprising rotating the handle relative to the gripping block to translate the rod relative to the implant carrier without rotation of the rod relative to the gripping block.

6. The method according to claim 1, wherein the first and second plates are parallel to one another after expansion of the implant to define open sides transverse to a longitudinal axis of the implant, said method further comprising injecting the filling material such that the first and second plates urge the filling material through the open sides and into adjacent cancellous bone of the vertebral body.

7. The method according to claim 1, further comprising:

removing the rod;

directing a needle of an injector through the implant carrier; and

injecting the filling material with the needle of the injector.

8. A method for restoration of a human or animal vertebral body comprising:

introducing an implant into a vertebral body;

expanding a unitary structure of the implant, the unitary structure including a first plate, a second plate, a first end element, and a second end element,

wherein the first plate expands in a first direction directly orthogonal to a longitudinal axis of the implant,

wherein the second plate expands in a second direction directly orthogonal to the longitudinal axis of the implant, the second direction being opposite to the first direction, and

wherein the first end element and the second end element become closer to one another and wherein the first and second plates are parallel to one another after expansion of the implant to define open sides transverse to a longitudinal axis of the implant; and

injecting a filling material through one of the first end element and the second end element of the implant such that the first and second plates urge the filling material through the open sides and into adjacent cancellous bone of the vertebral body.

9. The method according to claim 8, wherein the first plate and the second plate, when expanded, respectively form a first support surface and a second support surface in the vertebral body.

10. The method according to claim 8, wherein the first plate and the second plate each have a length equal to a length of the implant.

11. The method according to claim 8, wherein each of the first plate and the second plate form continuous smooth support surfaces over their respective lengths.

12. The method according to claim 8, wherein a first support and a second support are both parallel to the first and second plates prior to expansion of the implant.

13. The method according to claim 8, further comprising engaging a rod of an actuation instrument with the implant, the actuation instrument including a locking device adapted to control whether the rod is rotatable about its longitudinal axis.

14. The method according to claim 8, wherein injecting a filling material through one of the first end element and the second end element of the implant comprises injecting an ionic cement in the form of a phosphocalcic cement, an acrylic cement or a compound thereof.

15. The method according to claim 8, further comprising:

prior to the step of implanting the implant, coupling the implant to an implant carrier such that the implant carrier abuts the second end element and a rod extends through an opening of the second end element and engages the first end element;

after the step of implanting the implant, translating the rod relative to the implant carrier to move the first end element and the second end element closer to one another and move the first and second plates in the opposite directions;

removing the rod;

directing a needle of an injector through the implant carrier; and

injecting the filling material with the needle of the injector.

16. A method for restoration of a human or animal vertebral body comprising:

introducing an implant into a vertebral body, the implant comprising;

a first end element and a second end element, each centered on a longitudinal axis of the implant;

a first plate and a second plate each positioned between the first end element and the second end element when the implant is in a collapsed position; and

a first support arm extending from the first end element to the first plate and a second support arm extending from the first end element to the second plate;

expanding the first plate and the second plate from the collapsed position to an expanded position through rotation of the first support arm and the second support arm, respectively,

wherein the first plate expands in a first direction directly orthogonal to the longitudinal axis of the implant, and

wherein the second plate expands in a second direction directly orthogonal to the longitudinal axis of the implant, the second direction opposite the first direction; and

injecting a filling material through one of the first end element and the second end element of the implant.

17. The method according to claim 16, further comprising:

prior to the step of implanting the implant, coupling the implant to an implant carrier such that the implant carrier abuts the second end element and a rod extends through an opening of the second end element and engages the first end element;

after the step of implanting the implant, translating the rod relative to the implant carrier to move the first end element and the second end element closer to one another and move the first and second plates in the opposite directions;

removing the rod;

directing a needle of an injector through the implant carrier; and

injecting the filling material with the needle of the injector.