Stripped pedicle screw driver bit

Patent metadata

Field	Value
Publication number	US-9216044-B2
Application number	US-201213646373-A
Country	US
Kind code	B2
Filing date	Oct 5, 2012
Priority date	Oct 7, 2011
Publication date	Dec 22, 2015
Grant date	Dec 22, 2015

Abstract

A pedicle screw driver bit includes an elongated shank and a head. The shank includes a plurality of threads. The head is connected to one end of and configured to rotate relative to the shank. The head is configured to be received by a tulip connected to a pedicle screw. The threads of the shank are configured to engage a plurality of threads of the tulip such that when the shank is rotated the tulip is drawn into engagement with the head such that the shank, the head, the tulip, and the pedicle screw are substantially prevented from rotating relative to one another.

First claim

The invention claimed is:

1. A pedicle screw driver bit comprising:
an elongated shank comprising a plurality of threads; and
a head connected to one end of the shank,
wherein the head is configured to be received by opposing rod-receiving slots of a tulip connected to a pedicle screw,
wherein the tulip comprises a cylindrical collar that includes a first end and a second end to which an end of the pedicle screw is connected, and
wherein the threads of the shank are configured to engage a plurality of threads formed on at least one interior surface of the tulip such that when the shank is rotated the tulip is drawn into engagement with the head such that the head is seated in the opposing rod-receiving slots of the tulip, and the shank, the head, the tulip, and the pedicle screw are substantially prevented from rotating relative to one another such that they rotate together as a unit to facilitate rotating the pedicle screw with the pedicle screw driver bit.

2. The driver bit of claim 1 , wherein at least one of the shank and the head comprises one of a biocompatible metal or polymer.

3. The driver bit of claim 1 , wherein at least one of the shank and the head comprises one of stainless steel, aluminum, or titanium.

4. The driver bit of claim 1 , wherein the head comprises a cylindrical shape comprising an axis that is generally perpendicular to the longitudinal axis of the shank.

5. The driver bit of claim 1 , wherein the head comprises at least one of a circular, elliptical, or rectangular cylindrical shape.

6. The driver bit of claim 1 , wherein the opposing rod-receiving slots of the tulip extend from the first end toward the second end of the tulip.

7. A pedicle screw driver comprising:
a handle;
an elongated shaft comprising a first end connected to the handle;
a driver bit connected to a second end of the shaft generally opposite the first end, wherein the driver bit comprises:
an elongated shank comprising a plurality of threads; and
a head connected to one end of the shank,
wherein the head is configured to be received by opposing rod-receiving slots of a tulip connected to a pedicle screw,
wherein the tulip comprises a cylindrical collar that includes a first end and a second end to which an end of the pedicle screw is connected, and
wherein the threads of the shank are configured to engage a plurality of threads formed on at least one interior surface of the tulip such that when the shank is rotated the tulip is drawn into engagement with the head such that the head is seated in the opposing rod-receiving slots of the tulip, and the shank, the head, the tulip, and the pedicle screw are substantially prevented from rotating relative to one another such that they rotate together as a unit to facilitate rotating the pedicle screw with the pedicle screw driver bit.

8. The pedicle screw driver of claim 7 , wherein at least one of the shank and the head comprises one of a metal or polymer.

9. The pedicle screw driver of claim 7 , wherein at least one of the shank and the head comprises one of stainless steel, aluminum, or titanium.

10. The pedicle screw driver of claim 7 , wherein the head comprises a cylindrical shape comprising an axis that is generally perpendicular to the longitudinal axis of the shank.

11. The pedicle screw driver of claim 7 , wherein the head comprises at least one of a circular, elliptical, or rectangular cylindrical shape.

12. The pedicle screw driver of claim 7 , wherein the opposing rod-receiving slots of the tulip extend from the first end toward the second end of the tulip.

13. A method comprising:
inserting a pedicle screw driver bit into a tulip connected to a pedicle screw, wherein the driver bit comprises an elongated shank comprising a plurality of threads and a head connected to one end of the shank,
wherein inserting the pedicle screw driver bit into the tulip comprises positioning the head within opposing rod-receiving slots of the tulip, and
wherein the tulip comprises a cylindrical collar that includes a first end and a second end to which an end of the pedicle screw is connected;
rotating the shank in a first direction to cause the threads of the shank to engage a plurality of threads formed on at least one interior surface of the tulip until the tulip is drawn into engagement with the head of the driver bit such that the head is seated in the opposing rod-receiving slots of the tulip, and the shank, the head, the tulip, and the pedicle screw are substantially prevented from rotating relative to one another; and
rotating the shank in one of the first direction or a second direction opposite the first direction to cause the head, the tulip, and the stripped pedicle screw to rotate together in the one of the first or second direction.

14. The method of claim 13 , further comprising rotating the shank in the other of the first or second direction to cause the head, the tulip, and the stripped pedicle screw to rotate together in the other of the first or second direction.

15. A kit comprising:
a pedicle screw driver;
at least one pedicle screw comprising a tulip; and
a stripped pedicle screw driver bit comprising:
an elongated shank comprising a plurality of threads; and
a head connected to one end of the shank,
wherein the head is configured to be received by opposing rod-receiving slots of the tulip of the at least one pedicle screw,
wherein the tulip comprises a cylindrical collar that includes a first end and a second end to which an end of the pedicle screw is connected,
wherein the threads of the shank are configured to engage a plurality of threads formed on at least one interior surface of the tulip such that when the shank is rotated the tulip is pulled into engagement with the head such that the head is seated in the opposing rod-receiving slots of the tulip, and the shank, the head, the tulip, and the at least one pedicle screw are substantially prevented from rotating relative to one another such that they rotate together as a unit to facilitate rotating the pedicle screw with the pedicle screw driver bit.

16. The kit of claim 15 , wherein at least one of the shank and the head comprises one of a metal or polymer.

17. The kit of claim 15 , wherein at least one of the shank and the head comprises one of stainless steel, aluminum, or titanium.

18. The kit of claim 15 , wherein the head comprises a cylindrical shape comprising an axis that is generally perpendicular to the longitudinal axis of the shank.

19. The kit of claim 15 , wherein the head comprises at least one of a circular, elliptical, or rectangular cylindrical shape.

20. A kit comprising:
a plurality of stripped pedicle screw driver bits, each of the driver bits comprising:
an elongated shank comprising a plurality of threads; and
a head connected to one end of the shank,

wherein the head is configured to be received by opposing rod-receiving slots of a tulip connected to a pedicle screw,
wherein the tulip comprises a cylindrical collar that includes a first end and a second end to which an end of the pedicle screw is connected,
wherein the threads of the shank are configured to engage a plurality of threads formed on at least one interior surface of the tulip such that when the shank is rotated the tulip is drawn into engagement with the head such that the head is seated in the opposing rod-receiving slots of the tulip, and the shank, the head, the tulip, and the pedicle screw are substantially prevented from rotating relative to one another such that they rotate t

Assignees

• Univ Minnesota

Inventors

• Nuckley David John
• Polly Jr David Wayne

Classifications

• A61B17/7082 Primary

  for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws · CPC title

• A61B17/8888

  at its central region · CPC title