BONE SCREW SYSTEM AND METHOD

• US 20090131990A1
• Filed: 10/24/2008
• Published: 05/21/2009
• Est. Priority Date: 10/18/2001
• Status: Abandoned Application

• Current Assignee: OrthoIP, LLC
• Original Assignee: OrthoIP, LLC
• Inventors: Tipirneni, Kishore, Vassello, Wayne
• Application Number:
  US12/258,013
• Publication Number:
  US 20090131990A1
• Time in Patent Office: Days
• US Class Current: 606/301
• CPC Class Codes: A61B 17/742 having one or more longitudinal elements oriented along or parallel to the axis of the neck
• CPC Class Codes: A61B 17/744 the longitudinal elements coupled to an intramedullary nail
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/8004 with means for distracting or compressing the bone or bones
• CPC Class Codes: A61B 17/8047 wherein the additional element surrounds the screw head in the plate hole A61B17/8052 takes precedence
• CPC Class Codes: A61B 17/8057 the interlocking form comprising a thread
• CPC Class Codes: A61B 17/861 specially shaped for gripping driver
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/8685 comprising multiple separate parts
• CPC Class Codes: A61B 17/8863 Apparatus for shaping or cutting osteosynthesis equipment by medical personnel
• CPC Class Codes: A61B 17/8869 Tensioning devices
• CPC Class Codes: A61B 17/8877 characterised by the cross-section of the driver bit

Abstract

An improved bone screw comprising an adapter which permits to a stabilization device, such as a locking plate. The adapter may be operable to couple with the head of a bone screw and may comprise a plurality of threads to permit coupling with holes located in a locking plate. The adapter may be configured to orient a bone screw at a desired trajectory.

Claims

1. A bone screw system for maintaining a compressive load in a fracture comprising:

a bone screw comprising a shaft, a head portion coupled to a first end of said shaft, and an anchor component coupled to a second end of said shaft; and

an adapter configured to couple with said bone screw and a bone stabilization device.

2. A bone screw system of claim 1, wherein said head portion comprises a retaining ring to permit coupling with said adapter.

3. A bone screw system of claim 2, wherein said adapter comprises a lip configured to mate with said retaining ring of said head portion.

4. A bone screw system of claim 1, wherein said adapter comprises a hollow center portion, said center portion configured to be insertable around said shaft and slidable along the length of said shaft to couple with said head portion.

5. A bone screw system of claim 1, wherein said adapter comprises an outwardly-facing threaded portion.

6. A bone screw system of claim 5, further comprising a bone stabilization device having at least one hole configured to receive said bone screw.

7. A bone screw system of claim 6, wherein said hole comprises a plurality of threads.

8. A bone screw system of claim 7, wherein said outwardly facing threaded portion of said adapter is configured to mate with said hole of said bone stabilization device.

9. A bone screw of claim 1, wherein said bone screw further comprises a sleeve, and said shaft is reciprocally received within said sleeve.

10. A bone screw system of claim 6, wherein said bone stabilization system is a locking plate.

12. A bone screw system of claim 2, wherein said hollow center portion is oriented at an angle within said adapter to orient said bone screw at a desired trajectory.

13. A bone screw system of claim 9, said bone screw further comprising a compressive device.

14. A bone screw system of claim 13, wherein said compressive device is a spring.

15. A bone screw system of claim 13, wherein said compressive device is located within said sleeve and is configured to resist distal movement of said shaft.

16. A bone screw system of claim 13, wherein said distal anchor component comprises one of a gripping device, a tip, cutting threads and fastening threads.

11. A bone screw system of claim, wherein said hole is angled within said locking plate to orient said bone screw at a desired trajectory.

17. An adapter for coupling a bone screw with a bone stabilization device comprising:

a hollow central portion operable to fit around a shaft of a bone screw;

a first means for coupling said adapter to a head of a bone screw;

a second means for coupling said adapter to a bone stabilization device.

18. An adapter of claim 17, wherein said first means for coupling is a lip having a plurality of notches.

19. An adapter of claim 17, wherein said second means for coupling is a plurality of threads.

20. An adapter of claim 17, wherein said hollow central portion is oriented at an angle relative to said adapter so as to be operable to orient a bone screw at a desired trajectory.