Methods and apparatuses for bone restoration

• US 20060004455A1
• Filed: 06/09/2005
• Published: 01/05/2006
• Est. Priority Date: 06/09/2004
• Status: Active Grant

• Current Assignee: Stryker European Operations Limited (Stryker Corporation)
• Original Assignee: Vexim SAS
• Inventors: Leonard, Alain, Oglaza, Jean-Francois
• Granted Patent: US 7,846,206 B2
• Time in Patent Office: Days
• US Class Current: 623/17.150
• 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 animal 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 out 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. An expansible implant for bone restoration comprising:

a single plane of expansion intrinsic to the implant, wherein upon the single plane of expansion corresponds to a bone restoration plane;

first and second opposed plates respectively forming first and a second bearing surfaces for the bone, wherein the first and second plates intended to move away one from the other according to the single plane of expansion at the time of the expansion of the implant;

first and second supports for each of the first and second bearing surfaces, located under each plate respectively; and

means for controlling expansion of the implant, the means including a material web provided between each support and a corresponding plate, having a determined thickness which controls expansion of the implant.

2. The expansible implant according to claim 1, further including a groove positioned adjacent each material web having a determined width to allow a clearance between each support and a respective plate.

3. The expansible implant according to claim 1, wherein each support is substantially equal in length to one another.

4. The expansible implant according to claim 1, wherein at least one first support of at least one of the plate is shorter in length than a corresponding second support, such that upon expansion of the implant, the first and second plates move at an angle to one another.

5. The expansible implant according to claims 1, wherein the first and second supports comprise a pair of first and second supports.

6. A medical insertion device for inserting an expansible implant into a patient comprising:

a gripping portion, having a central bore

a first tube housed in the central bore;

a threaded rod housed in the first tube having a distal end for receiving an implant for insertion into the patient;

a handle attached to the gripping portion and/or the implant carrier; and

a gauge for determining an expansion of the implant.

7. The device according to claim 6, wherein a proximal end of the gripping portion and a proximal end of the first tube are flush.

8. The device according to claim 6, wherein the handle is attached to the proximal end of either or both of the gripping portion and the first tube.

9. The device according to claim 8, wherein the handle is free to rotate relative to the gripping portion and/or the first tube.

10. The device according to claim 6, wherein the handle includes an opening having screw threads corresponding in thread pitch to a thread pitch of the threaded rod.

11. The device according to claim 6, wherein the gauge comprises an opening in the gripping portion for viewing a portion of the threaded rod.

12. The device according to claim 11, further comprising first markings positioned adjacent the window associated with second markings provided on a portion of the threaded rod displayed in the window, wherein rotation of the threaded rod results in relative movement between the first and second markings.

13. The device according to claim 6, further comprising a locking device to substantially stop the threaded rod from rotation.

14. A system for bone restoration comprising:

at least one expansible implant having a single plane of expansion for corresponding to a bone restoration plane;

a first tube for positioning adjacent an exterior surface of a bone for restoration;

a first rod having a threaded end for affixing into a distal end of the interior of the bone, the first rod being received within the first tube;

a second tube for receiving the first tube therein;

a third tube for receiving the second tube, the third tube including one or more engagement members for anchoring the third tube on the exterior surface of the bone;

a drill for establishing an enlarged opening in the side of the bone, wherein the drill is guided by the first rod; and

a medical insertion device for inserting an expansible implant into a patient.

15. The system according to claim 14, wherein the medical insertion device comprises:

a gripping portion, having a central bore

a fourth tube housed in the central bore;

a second rod housed in the first tube having a distal end for receiving an implant for insertion into the patient, the second rod being threaded;

a handle attached to the gripping portion and/or the implant carrier; and

a gauge for determining an expansion of the implant.

16. A method for restoration of human or animal bone anatomy, comprising:

introduction, into a bone, of an expansible implant having a single plane of expansion,

positioning said expansible implant in said bone in order to correspond the single determined plane with a bone restoration plane,

expanding the implant in said bone restoration plane, wherein a first support surface and a second support surface spread tissues within said bone, and

injecting a filling material around said implant.

17. The method according to claim 16, wherein injecting comprises injecting an ionic cement.