Spinal Plate

• US 20130060337A1
• Filed: 04/05/2012
• Published: 03/07/2013
• Est. Priority Date: 09/06/2011
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Petersheim, Samuel, Agard, Ryan
• Granted Patent: US 9,427,330 B2
• Time in Patent Office: Days
• US Class Current: 623/17.16
• CPC Class Codes: A61B 17/7059 Cortical plates A61B17/7007, A61B17/7058 take precedence
• CPC Class Codes: A61B 17/8042 the additional component being a cover over the screw head
• CPC Class Codes: A61B 17/808 Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 17/92 Impactors or extractors, e.g. for removing intramedullary devices insertion or extraction of artificial joints A61F2/4603
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• 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 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/46 Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30482 using a locking cam
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30576 with extending fixation tabs
• CPC Class Codes: A61F 2002/30578 having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30607 Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/308 : oblong
• CPC Class Codes: A61F 2002/30843 : Pyramidally-shaped
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/4615 : of spacers
• CPC Class Codes: A61F 2002/4622 : having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2220/0016 : with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

Spinal plates with additional features to improve the stability of the interface between the plate and the underlying bone. A bone plate may include one or more sharp ridges along the periphery of its underside. When attached to bone, the ridge digs into the bone and increases stability. A bone plate may alternatively or additionally include one or more holes for optional spikes, which may be inserted once the plate is attached to the bone. By separating the spikes and including them as an optional component, the plate may enhance stability while reducing or eliminating the chance of the spike injuring the patient. Furthermore, bone screws may incorporate alternating notches and ridges into the head of the screw. The notches and ridges may interface with a set screw, thereby preventing rotation and loosening of the screw.

Claims

1. A surgical method comprising:

inserting a spacer body into a disc space;

operably connecting a guide member to the spacer body;

passing a plate over the guide member to position the plate adjacent the spacer body, wherein the plate includes at least one hole to receive a fastener; and

securing the plate to a vertebral body by inserting at least one fastener through the at least one hole of the plate into the vertebral body.

2. The method of claim 1, wherein the spacer body comprises an upper surface and a lower surface having ridges.

3. The method of claim 1, wherein the guide member comprises a first rigid portion and a second flexible portion.

4. The method of claim 3, wherein the flexible portion of the guide is attached to the rigid portion of the guide using an adhesive or mechanical fixation.

5. The method of claim 3, wherein the plate comprises a ridge along its perimeter.

6. The method of claim 1, further comprising positioning the plate at substantially a 90-degree angle relative to the spacer body prior to securing the plate to a vertebral body.

7. A surgical method comprising:

inserting a spacer body into a disc space;

operably connecting a guide member to the spacer body, wherein the guide member comprises a first portion and a second portion, the second portion being more flexible than the first portion;

passing a plate over the guide member to position the plate adjacent the spacer body; and

securing the plate to a vertebral body.

8. The method of claim 7, wherein the first portion of the guide member is formed of nitinol.

9. The method of claim 7, wherein the second portion of the guide member is formed of stainless steel.

10. The method of claim 7, wherein the spacer body includes a rectangular hole extending from a superior surface to an inferior surface.

11. The method of claim 10, wherein the superior surface and inferior surface of the spacer body includes a plurality of teeth.

12. The method of claim 7, wherein the plate includes a ridge around its perimeter.

13. The method of claim 7, wherein the plate is secured to a vertebral body via at least two screws.

14. The method of claim 7, wherein the plate comprises a central hole.

15. The method of claim 14, further comprising inserting a keying tool through the central hole of the plate to prevent rotation between the plate and the spacer body.

16. A surgical method comprising:

inserting a spacer body into a disc space, wherein the spacer body includes a recess;

operably connecting a guide member adjacent to the spacer body;

passing a plate over the guide member to position the plate adjacent the spacer body; and

securing the plate to a vertebral body.

17. The method of claim 16, wherein the keying tool is not cannulated.

18. The method of claim 16, wherein the guide member comprises a rigid portion attached to a flexible portion.

19. The method of claim 16, further comprising inserting a keying tool through a central hole of the plate to prevent rotation between the plate and the spacer body.

20. The method of claim 19, wherein the keying tool is cannulated and operates over the guide member.