Locking bone plate

• US 20050015089A1
• Filed: 03/25/2004
• Published: 01/20/2005
• Est. Priority Date: 03/26/2003
• Status: Active Grant

• Current Assignee: New Generation Devices, Viant AS&O Holdings, LLC (Viant Medical, LLC)
• Original Assignee: Greatbatch Medical SA (Integer Holdings Corporation Inc)
• Inventors: White, Patrick Michel, Khowaylo, Michael, Young, Robert Allan
• Granted Patent: US 7,722,653 B2
• Time in Patent Office: Days
• US Class Current: 606/915
• CPC Class Codes: A61B 17/8014 the extension or compression force being caused by interaction of the plate hole and the screws
• CPC Class Codes: A61B 17/8052 immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
• CPC Class Codes: A61B 17/8057 the interlocking form comprising a thread
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/8095 Wedge osteotomy devices

Abstract

A bone plate(s) of complex form is provided, particularly suited to tibial plateau-leveling osteotomy and a distal femoral osteotomy. The bone plate has a main longitudinal axis, a bone-contacting bottom side (not shown) and a top side with at least three sets of overlapping holes which communicate through the plate from the top to the bottom side. The sets of overlapping holes define threaded apertures having multifaceted surfaces. When applied to a bone, two sets of such overlapping holes are located so as to lie on opposite sides of an osteotomy site and on the tibial plate; a third is aligned at approximately 60 degrees with the longitudinal axis. The configuration of this complex bone plate vary, depending on the physiology of the patient. An object of the invention is to provide an orthopaedic surgeon greater flexibility of choice in that a threaded peg providing secure fixing can be positioned at any interval along the bone plate, including at its extreme ends or on its elbow.

Claims

1. A bone plate of complex form, suitable for use in osteotomy, the bone plate having a longitudinal axis, a bone-contacting bottom side and a top side with at least two sets of overlapping holes which communicate through the plate from the top to the bottom side, wherein the sets of overlapping holes define threaded apertures having multifaceted surfaces, and wherein, when applied, two sets of such overlapping holes are located so as to lie on opposite sides of an osteotomy site and a third hole is aligned at an angle with respect to the longitudinal axis.

2. The bone plate of claim 1, wherein the threaded apertures are positioned so as to be on either side of the point of osteotomy when applied to bone and include wide bevels on a far end away from the osteotomy site.

3. The bone plate of claim 1, wherein bone plate further include at least one locking bone peg having a threaded head which locks with the threads of a corresponding threaded aperture, thereby better ensuring rigid fixing of a fracture when using pegs having a body without threads.

4. The bone plate of claim 1, wherein the multifaceted surfaces are threads.

5. The bone plate of claim 1, wherein the bone plate includes at least one round hole having a corresponding countersink, the countersink being axially offset from an orientation perpendicular to the top surface by a predetermined angle.

6. The bone plate of claim 5, wherein the predetermined angle is approximately 25 degrees.

7. A bone plate of complex form, suitable for use in osteotomy, the bone plate having

(a) a least two axes on which bone screw receiving holes are located including a longitudinal axis and an axis substantially angled therefrom, and

(b) a bone-contacting bottom side and a top side with at least two sets of overlapping holes which communicate through the plate from the top to the bottom side, wherein the sets of overlapping holes define threaded apertures having multifaceted surfaces, and wherein, when applied, two adjacent sets of such overlapping holes are located so as to lie on opposite sides of an osteotomy site.

8. The bone plate of claim 7, wherein the threaded apertures are positioned so as to be on either side of the point of osteotomy when applied to bone and include wide bevels on a far end and near end with respect to the osteotomy site.

9. The bone plate of claim 7, wherein bone plate further accommodates at least one locking bone peg having an unthreaded body and threaded head which locks with the threads of a corresponding threaded aperture, thereby better ensuring rigid fixing of a fracture.

10. The bone plate of claim 7, wherein the multifaceted surfaces are threads.

11. The bone plate of claim 7 wherein a distance between the threaded apertures is defined to optimize either closing or opening of wedge femoral osteotomies.

12. The bone plate of claim 11 where the distance is approximately 15 mm.

13. The bone plate of claim 12 where a distal end of the plate forms a natural curve corresponding to the shape of the distal femur in order to minimize the potential of plate overhang.

14. An orthopedic kit including:

a. A bone plate of complex form, suitable for use in osteotomy, the bone plate having a longitudinal axis, a bone-contacting bottom side and a top side with at least three sets of overlapping holes which communicate through the plate from the top to the bottom side, wherein the sets of overlapping holes define threaded apertures having multifaceted surfaces, and wherein, when applied, two adjacent sets of such overlapping holes are located so as to lie on opposite sides of an osteotomy site; and

b. at least one bone screw engageable with the bone plate.

15. The kit of claim 14, further comprising a drill guide having a main drill guide surface and opposite end portions, one end portion of which is securely engageable with the multi-faceted surface of a hole in the bone plate so as to securely hold the drill guide in a desired orientation with respect to the bone plate for stabilizing a drill used in an orthopedic procedure.

16. The kit of claim 14, wherein, when a bone plate is applied to a bone, two sets of such overlapping holes are located so as to lie on opposite sides of an osteotomy site and the third is aligned at approximately 60 degrees with the longitudinal axis.