Bone screw inserters and methods

Patent metadata

Field	Value
Publication number	US-12440255-B2
Application number	US-202217982096-A
Country	US
Kind code	B2
Filing date	Nov 7, 2022
Priority date	Nov 8, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

Bone screw drivers are disclosed that apply torque to a threaded shank of a bone screw assembly and receive a cement delivery device to introduce bone cement through the threaded shank. Also disclosed are driver adapters that couple to a driver in order to facilitate application of torque thereto. The driver adapter can decouple from the driver after implanting a bone screw shank to allow the subsequent use of a cement delivery device in combination with the driver. The devices can be reusable and can employ a number of additional components, including retaining and counter-torque sleeves, driving handles, etc. Further, the devices can allow setup of a bone screw inserter assembly outside a surgical field, such that a completed assembly can be passed to a surgeon or other user for immediate use.

First claim

What is claimed is:

1. A surgical assembly, comprising:
a driver having a distal tip configured to couple with another component in a manner that prevents rotation therebetween, and a proximal driver body with a lumen extending from the proximal-most end of the driver to the distal-most end of the driver;
a driver adapter having a distal adapter body and a proximal torque-receiving end;
wherein the driver adapter is coupled to the driver such that a portion of the proximal driver body is received within a distal-facing cavity of the distal adapter body;
wherein the driver adapter is configured to impart rotational force to the driver and the distal adapter body includes one or more pivoting latches that interface with a groove formed on the driver to prevent axial separation of the driver and the driver adapter.

2. The assembly of claim 1 , wherein the driver adapter includes a lumen extending from a proximal-most end of the driver adapter to the distal-facing cavity.

3. The assembly of claim 1 , wherein the driver includes one or more flats formed on the proximal driver body that interface with one or more flats formed on an interior surface of the distal-facing cavity of the driver adapter.

4. The assembly of claim 1 , further comprising a retaining sleeve disposed over a portion of the driver.

5. The assembly of claim 4 , wherein the retaining sleeve includes a threaded distal end configured to interface with a bone screw receiver head.

6. The assembly of claim 4 , wherein the retaining sleeve includes a lock configured to prevent separation of the retaining sleeve and driver.

7. The assembly of claim 4 , further comprising a second sleeve disposed over a portion of the retaining sleeve.

8. The assembly of claim 7 , wherein the second sleeve includes a plurality of rigid extensions formed at a distal end thereof configured to be received between portions of a bone screw receiver head.

9. The assembly of claim 7 , wherein the second sleeve includes a plurality of flexible extensions formed at a proximal end thereof configured to deflect and ride over one or more surface features formed on the retaining sleeve.

10. The assembly of claim 7 , wherein the second sleeve is configured to move between a distal position, in which the second sleeve is locked against rotation relative to a bone screw receiver head coupled to the retaining sleeve, and a proximal position, in which the second sleeve can rotate relative to the bone screw receiver head coupled to the retaining sleeve.

11. The assembly of claim 1 , further comprising a driver handle coupled to the proximal torque-receiving end of the driver adapter.

12. The assembly of claim 1 , further comprising a surgical navigation array coupled to the driver adapter.

13. A surgical assembly, comprising:
a driver having a distal tip configured to couple with another component in a manner that prevents rotation therebetween, and a proximal driver body with a lumen extending from the proximal-most end of the driver to the distal-most end of the driver;
a driver adapter having a distal adapter body and a proximal torque-receiving end;
wherein the driver adapter is coupled to the driver such that a portion of the proximal driver body is received within a distal-facing cavity of the distal adapter body;
a retaining sleeve disposed over a portion of the driver; and
a second sleeve disposed over a portion of the retaining sleeve and configured to selectively lock the second sleeve against rotation relative to a bone screw receiver head coupled to the retaining sleeve;
wherein the driver adapter is configured to impart rotational force to the driver and the distal adapter body includes a lock configured to prevent axial separation of the driver and the driver adapter.

14. The assembly of claim 13 , wherein the second sleeve is locked against rotation relative to the bone screw receiver head when in a first position relative to the retaining sleeve and permits rotation relative to the bone screw receiver head when in a second position relative to the retaining sleeve that is proximal to the first position.

15. A surgical assembly, comprising:
a driver having a distal tip configured to couple with another component in a manner that prevents rotation therebetween, and a proximal driver body with a lumen extending from the proximal-most end of the driver to the distal-most end of the driver;
a driver adapter having a distal adapter body and a proximal torque-receiving end;
wherein the driver adapter is coupled to the driver such that a portion of the proximal driver body is received within a distal-facing cavity of the distal adapter body;
a retaining sleeve disposed over a portion of the driver; and
a second sleeve disposed over a portion of the retaining sleeve, the second sleeve including a plurality of rigid extensions formed at a distal end thereof configured to be received between portions of a bone screw receiver head;
wherein the driver adapter is configured to impart rotational force to the driver and the distal adapter body includes a lock configured to prevent axial separation of the driver and the driver adapter.

16. A surgical assembly, comprising:
a driver having a distal tip configured to couple with another component in a manner that prevents rotation therebetween, and a proximal driver body with a lumen extending from the proximal-most end of the driver to the distal-most end of the driver;
a driver adapter having a distal adapter body and a proximal torque-receiving end;
wherein the driver adapter is coupled to the driver such that a portion of the proximal driver body is received within a distal-facing cavity of the distal adapter body;
a retaining sleeve disposed over a portion of the driver; and
a second sleeve disposed over a portion of the retaining sleeve, the second sleeve including a plurality of flexible extensions formed at a proximal end thereof configured to deflect and ride over one or more surface features formed on the retaining sleeve;
wherein the driver adapter is configured to impart rotational force to the driver and the distal adapter body includes a lock configured to prevent axial separation of the driver and the driver adapter.

17. A surgical assembly, comprising:
a driver having a distal tip configured to couple with another component in a manner that prevents rotation therebetween, and a proximal driver body with a lumen extending from the proximal-most end of the driver to the distal-most end of the driver;
a driver adapter having a distal adapter body and a proximal torque-receiving end;
wherein the driver adapter is coupled to the driver such that a portion of the proximal driver body is received within a distal-facing cavity of the distal adapter body; and
wherein a distal-facing surface within the distal-facing cavity includes a protrusion extending distally therefrom that is configured to be received within the lumen of the proximal driver body and impart torque thereto; and
wherein the driver adapter is configured to impart rotational force to the driver and the distal adapter body includes a lock configured to prevent axial separation of the driver and the driver adapter.

18. The device of claim 17 , wherein the protrusion includes one or more flats formed thereon.

19. The device of claim 18 , wherein the protrusion includes a first portion having the one or more flats formed thereon and a second portion extending distal to the first portion and having a diameter less than a diameter of the first portion.

Assignees

• Medos Int Sarl

Inventors

• Elsawah Lamis
• Harris Shawn
• Runco Thomas
• Miller William
• Sorrenti Michael
• Biester Eric
• Schertle Brad

Classifications

• A61B2034/2072

  Reference field transducer attached to an instrument or patient · CPC title

• A61B2090/3983

  Reference marker arrangements for use with image guided surgery · CPC title

• A61B2017/0046

  with a releasable handle; with handle and operating part separable · CPC title

• A61B17/8816

  characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections · CPC title

• A61B17/8875

  Screwdrivers, spanners or wrenches · CPC title