Bone anchorage screw with built-in hinged plate

• US 20060149252A1
• Filed: 12/30/2004
• Published: 07/06/2006
• Est. Priority Date: 12/30/2004
• Status: Active Grant

• Current Assignee: Kyphon SARL (Medtronic Plc)
• Original Assignee: Kyphon SARL (Medtronic Plc)
• Inventors: Malandain, Hugues F., Markworth, Aaron D.
• Granted Patent: US 7,789,899 B2
• Time in Patent Office: Days
• US Class Current: 606/900
• CPC Class Codes: A61B 17/7005 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
• CPC Class Codes: A61B 17/7007 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
• CPC Class Codes: A61B 17/701 Longitudinal elements with a non-circular, e.g. rectangular, cross-section A61B17/7005, A61B17/7007 take precedence
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7037 wherein pivoting is blocked when the rod is clamped
• CPC Class Codes: A61B 17/8047 wherein the additional element surrounds the screw head in the plate hole A61B17/8052 takes precedence

Abstract

An implantable medical device and methods of use thereof are provided for supporting a structure. The structure supported can include a bony structure. The device is comprised of a screw assembly including a base and a support configured for receiving one or more anchor assemblies. The support includes a top portion, a bottom portion and an interconnection means for coupling the base to the support. The interconnection means allows the support to be positionable in a first position that is substantially parallel to a long axis of the base and secondarily positionable substantially perpendicular to the long axis of the base. The base and the one or more anchor assemblies are configured for attachment to a structure in a patient.

Claims

1. A medical device for supporting a structure comprising:

a screw assembly, the screw assembly including

a base,

a support configured for receiving one or more anchor assemblies, the support including a top portion and a bottom portion, and

an interconnection means for coupling the base to the support, the interconnection means allowing the support to be positionable in a first position that is substantially parallel to a long axis of the base and secondarily positionable substantially perpendicular to the long axis of the base,

the base and the one or more anchor assemblies configured for attachment to a structure in a patient.

2. The medical device of claim 1, wherein the structure supported is bone selected from the group consisting of a vertebra, femur, tibia, fibula, humerus, radius, ulna, calcaneous, and a pelvis.

3. The medical device of claim 1, wherein the screw assembly has an overall length sized for subcutaneous support of the posterior of a spine.

4. The medical device of claim 1, wherein the base is comprised of

a base head having a shape and a locking means, and

an anchor.

5. The medical device of claim 4, wherein the base head shape is an open saddle-type head.

6. The medical device of claim 4, wherein the locking means is comprised of a setscrew,

wherein the setscrew is configured to link the support and the base, and

wherein tightening the setscrew effects locking of the support in a position relative to a long axis of the base.

7. The medical device of claim 4, wherein the anchor is selected from the group consisting of a screw, staple, nail, hook and a pin.

8. The medical device of claim 4, wherein the anchor is a screw configured for bone anchoring.

9. The medical device of claim 4, wherein the anchor is a screw configured for insertion into the pedicle of a vertebra.

10. The medical device of claim 1, wherein the support has a shape selected from the group consisting of a board, plate, elongated cross-section, oval, square, I-beam and a rod.

11. The medical device of claim 1, wherein the support is comprised of

a connector end,

one or more apertures, and

a receiver.

12. The medical device of claim 11, wherein the connector end is configured for interconnection of the support and the base of the screw assembly.

13. The medical device of claim 11, wherein the connector end is configured for hinge-type interconnection of the support and the base of the screw assembly.

14. The medical device of claim 11, wherein the one or more apertures of the support include a first connector end proximal aperture having a dimensional configuration to support a range of movement of the base in relation to the support, and, one or more second connector end distal apertures providing access to the base and the means for locking the anchor assembly to the support, when assembled with the support.

15. The medical device of claim 1, wherein the support is comprised of

a support member having a top portion and a bottom portion,

a head assembly, and

an interconnection means.

16. The medical device of claim 15, wherein the support member is comprised of a receiver, and

one or more apertures.

17. The medical device of claim 16, wherein the one or more apertures include

a first aperture wherein an anchor assembly is passable therethrough and lockably engagable with the support member, and

a second aperture wherein access is provided from the top portion of the support member to access the head assembly.

18. The medical device of claim 15, wherein the head assembly is comprised of

a connector end,

an aperture having a dimensional configuration supporting a range of movement of the base in relation to the support, and

a connector end proximal aperture having a dimensional configuration to support a range of movement of the base in relation to the support,

a locking means for securing the head assembly to the support member, wherein the head assembly is configured for interconnection with the support member.

19. A method of supporting a bony structure, the method comprising the steps of:

1) delivering to bone a screw assembly comprising a support having a receiver, a base, an interconnection means, and a locking means;

2) deploying the support substantially perpendicular to the long axis of the base;

3) passing through the support and implanting one or more anchor assemblies having a base and a locking means into bone;

4) locking the bases within one or more of the anchor assemblies;

5) locking one or more of the anchor assemblies within the support receiver; and

6) engaging the locking means of the screw assembly to secure the position of the support in relation to the base.

20. A method of supporting a bony structure, the method comprising the steps of:

1) delivering to bone a screw assembly comprising;

a support comprising a support member having a receiver, a head assembly having a connector end an interconnection means and a locking means for securing the head assembly to the support member;

a base;

an interconnection means, and a locking means for securing the support in a position in relation to the base;

2) deploying the support substantially perpendicular to the long axis of the base;

3) passing through the support and implanting one or more anchor assemblies having a base and a locking means into bone;

4) locking the bases within one or more of the anchor assemblies;

5) locking one or more of the anchor assemblies within the support receiver;

6) locking the head assembly within the support member; and

engaging the locking means of the screw assembly to secure the position of the support in relation to the base.