Compression nut and a system for treating a bone

Patent metadata

Field	Value
Publication number	US-11478277-B2
Application number	US-202016815762-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Mar 11, 2020
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A compression nut for treating a bone includes a head and a body extending longitudinally from the head to a free end. The body includes a first portion including an exterior surface tapering from the head toward a second portion. An exterior threading extends along an exterior surface of both the first portion and the second portion of the body. The nut also includes a channel extending longitudinally through the body. The channel includes an interior threaded extending along an interior surface of the channel configured to threadedly engage a portion of a locking screw therein.

First claim

What is claimed is:

1. A compression nut for treating a bone, comprising:
a head and a body extending longitudinally from the head to a free end, the body including a first portion including an exterior surface tapering from the head toward a second portion, the second portion having a substantially consistent cross-section along a length thereof, an exterior threading extending along an exterior surface of the first portion and an exterior surface of the second portion of the body; and
a channel extending longitudinally through the body and including an interior threading extending along an interior surface of the channel configured to threadedly engage a portion of a locking screw therein.

2. The compression nut of claim 1 , wherein the free end includes cutting teeth configured for cutting bone as the compression nut is driven into a bone.

3. The compression nut of claim 1 , wherein the first portion of the body is substantially conical and the second portion of the body is substantially cylindrical.

4. The compression nut of claim 1 , further comprising a plurality of slots extending through a wall of the body, the wall defined via the interior surface of the channel and the exterior surface of the body so that the channel is open to an exterior of the compression nut via the slots.

5. The compression nut of claim 4 , wherein the plurality of slots extends through the second portion of the body.

6. The compression nut of claim 4 , wherein each of the plurality of slots extend transverse relative to a longitudinal axis of the compression nut so that each of the plurality of slots extend about a portion of a circumference of the body.

7. The compression nut of claim 6 , wherein each of the plurality of slots are one of offset from one another and aligned relative to one another along a length of the body.

8. The compression nut of claim 4 , wherein each of the plurality of slots extends longitudinally along a portion of a length of the body.

9. The compression nut of claim 8 , wherein the plurality of slots are arranged in pairs so that a longitudinal portion of the body extending between a first slot and a second slot of each of the pairs is deformed radially inward toward a longitudinal axis of the compression nut.

10. The compression nut of claim 8 , wherein the plurality of slots is equidistantly spaced from one another about a circumference of the body.

11. The compression nut of claim 8 , wherein a portion of the body extending between adjacent one of the plurality of slots is deformed radially inward toward a longitudinal axis of the compression nut.

12. The compression nut of claim 1 , wherein a diameter of the first portion is a maximum at a proximal end thereof adjacent to the head and tapers to a minimum diameter at a distal end thereof adjacent to the proximal end of the second portion.

13. The compression nut of claim 12 , wherein the first portion is substantially conical and the second portion is substantially cylindrical.

14. A system for treating a long bone, comprising:
an intramedullary nail insertable through a medullary canal of a bone, the intramedullary nail extending from a proximal end to a distal end and including a locking hole extending through the intramedullary nail along an axis extending at an angle relative to a longitudinal axis of the intramedullary nail;
a locking screw configured to be inserted into the bone and through the locking hole, the locking screw including a head portion and a shaft extending therefrom to a free end, the shaft including a threading extending therealong; and
a compression nut including a head and a body extending longitudinally from the head to a free end, the body including a first portion including an exterior surface tapering from the head toward a second portion the second portion having a substantially consistent cross-section along a length thereof, an exterior threading extending along the exterior surface of both the first portion and the second portion of the body, a channel extending longitudinally through the compression nut and including an interior threading extending along a portion of an interior surface of the channel to threadedly engage a portion of the locking screw therein.

15. The system of claim 14 , further comprising an insertion device including a handle member and a shaft extending therefrom to an end including a driving tip.

16. The system of claim 15 , wherein the driving tip includes a plurality of prongs extending longitudinally from an end face of the shaft.

17. The system of claim 16 , wherein the compression nut includes a driving recess extending into the head of the compression nut, the driving recess comprised of a plurality of recesses extending about a periphery of the channel, each of the recesses sized, shaped and configured to receive a corresponding one of the prongs therein.

18. The system of claim 17 , wherein each of the plurality of recesses has a circular cross-section.

19. The system of claim 14 , wherein the compression nut includes a plurality of slots extending through a wall of the body so that the channel is open to an exterior of the compression nut via the slots.

20. The system of claim 19 , wherein each of the plurality of slots extend transverse relative to a longitudinal axis of the compression nut so that each of the plurality of slots extend about a portion of a circumference of the body to permit one of an expansion and compression along a longitudinal axis of the compression nut, a bending relative to the longitudinal axis and twisting about the longitudinal axis.

21. The system of claim 19 , wherein each of the plurality of slots of the compression nut extend longitudinally along a portion of a length of the body.

22. The system of claim 21 , wherein the plurality of slots is arranged in pairs so that a longitudinal portion of the body extending between a first slot and a second slot of each of the pairs is deformed radially inward toward a longitudinal axis of the compression nut.

23. The system of claim 19 , wherein a portion of the body extending between adjacent one of the plurality of slots is deformed radially inward toward a longitudinal axis of the compression nut.

Assignees

• Depuy Synthes Products Inc

Inventors

• Aebi This
• Spreiter Gregor
• Scherrer Simon
• Défossez Henri

Classifications

• A61B2017/681

  Alignment, compression, or distraction mechanisms · CPC title

• A61B17/683 Primary

  comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut · CPC title

• A61B17/8665

  Nuts · CPC title

• A61B17/8605

  Heads, i.e. proximal ends projecting from bone · CPC title

• A61B17/8875

  Screwdrivers, spanners or wrenches · CPC title