Intramedullary nail with oblique openings

• US 10,010,355 B2
• Filed: 03/24/2014
• Issued: 07/03/2018
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Czartoski, Timothy J, Davison, Dale G, Muhammad, William, Cole, Jack Dean, Moed, Berton R, Watson, J. Tracy, Wich, Michael Karl-Heinz
• Primary Examiner(s): MERENE, JAN CHRISTOP L
• Application Number:
  US14/223,546
• Publication Number:
  US 20140288559A1
• Time in Patent Office: 1,562 Days
• Field of Search: 606 62- 68
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/7225 for bone compression
• CPC Class Codes: A61B 17/7233 with special means of locking the nail to the bone
• CPC Class Codes: A61B 17/725 with locking pins or screws of special form

Abstract

An intramedullary nail for use in a medullary canal of a long bone. The nail includes a body defining a longitudinal axis and an external periphery for fitting in the medullary canal of the long bone. The body has a first internal wall thereof defining a first opening through the body, defining a first opening centerline. The body has a second internal wall defining a second opening through the body, defining a second opening centerline. The first opening centerline and the second opening centerline are oblique with respect to each other. The longitudinal axis of the body and the first opening centerline form an acute angle between the longitudinal axis of the body and the first opening centerline. The longitudinal axis of the body and the second opening centerline forming an acute angle between the longitudinal axis of the body and the second opening centerline.

Claims

1. An intramedullary nail for use in a medullary canal of a long bone, the intramedullary nail comprising:

a body defining a longitudinal axis and an external periphery thereof for fitting in the medullary canal of the long bone,

the body defining a first screw trajectory from a first proximal lateral opening to a first distal medial opening when a first screw is implanted in the long bone,

the body defining a second screw trajectory from a second distal lateral opening to a second proximal medial opening when a second screw is implanted in the long bone,

the first screw trajectory and the second screw trajectory each passing through a first portion of the intramedullary nail and defining a direction in which the first and second screws are configured to be inserted into the intramedullary nail when the first and second screws are implanted in the long bone,

the first portion arranged at a first angle relative to the longitudinal axis,

the first screw trajectory and the second screw trajectory being oblique with respect to each other,

the longitudinal axis and the first screw trajectory defining a first plane, the longitudinal axis and the second screw trajectory defining a second plane,

wherein the first and second planes forms an acute angle directed towards the first proximal lateral opening and the second distal lateral opening.

2. The intramedullary nail as in claim 1, wherein at least a portion of the body is cannulated along the longitudinal axis.

3. The intramedullary nail as in claim 1, wherein at least a portion of the body defines a groove along the longitudinal axis.

4. The intramedullary nail as in claim 1, wherein at least one of the first proximal opening and the second proximal opening has a generally circular shape.

5. The intramedullary nail as in claim 1, wherein at least one of the first proximal opening and the second proximal opening has a generally oval shape.

6. The intramedullary nail as in claim 1, wherein at least one of the first screw trajectory and the second screw trajectory intersects the longitudinal axis of the body.

7. The intramedullary nail as in claim 1, wherein the body further defines a third screw trajectory extending from a third distal opening to a third proximal opening.

8. The intramedullary nail as in claim 1, wherein the external periphery of the body is substantially cylindrical.

9. The intramedullary nail as in claim 1, wherein the first portion has a first diameter and a second portion of the intramedullary nail has a second diameter, the first diameter being larger than the second diameter, the first portion having a length less than a length of the second portion.

10. The intramedullary nail as in claim 9, wherein the first portion is proximal to the second portion, and the first screw trajectory and the second screw trajectory are defined in the first portion.

11. The intramedullary nail as in claim 1, wherein the intramedullary nail further defines a third screw trajectory extending from a third distal opening to a third proximal opening.

12. A system for use in repairing a fracture in a long bone, the system comprising:

a nail adapted for implantation in a medullary canal of the long bone,

the nail defining a longitudinal axis and an external periphery thereof for fitting in the medullary canal of the long bone,

the nail defining a first screw trajectory from a first proximal lateral opening to a first distal medial opening when a first screw is implanted within the long bone,

the nail defining a second screw trajectory from a second distal lateral opening to a second proximal medial opening when a second screw is implanted in the long bone,

the first screw trajectory and the second screw trajectory being oblique with respect to each other,

the longitudinal axis and the first screw trajectory defining a first plane,

the longitudinal axis and the second screw trajectory defining a second plane,

the first and second planes forming an acute an angle facing the first proximal lateral opening and the second distal lateral opening;

wherein the first screw and the second screw can be collocated through the nail along the first and second screw trajectories.

13. The system as in claim 12, wherein at least a portion of the nail is cannulated along the longitudinal axis.

14. The system as in claim 12, wherein at least a portion of the nail defines a groove along the longitudinal axis.

15. The system as in claim 12, wherein at least one of the first proximal opening and the second proximal opening has a generally circular shape.

16. The system as in claim 12, wherein at least one of the first proximal opening and the second proximal opening has a generally oval shape.

17. The system as in claim 12, wherein the nail defines a third screw trajectory extending normal to the longitudinal axis of the nail.

18. The system as in claim 12, wherein at least one of the first screw trajectory and the second screw trajectory intersects the longitudinal axis of the nail.

19. The system as in claim 12, wherein the nail further defines a third screw trajectory extending from a third distal opening to a third proximal opening, each of the first proximal opening and the second distal opening having a generally circular shape.

20. The system as in claim 12, wherein the external periphery of the nail is substantially cylindrical.

21. The system as in claim 12, wherein the nail defines a first portion having a first diameter and a second portion having a second diameter, the first diameter being larger than the second diameter, the first portion having a length less than a length of the second portion.

22. The system as in claim 21, wherein the first portion is proximal to the second portion, and the first screw trajectory and the second screw trajectory are defined in the first portion.

23. The system as in claim 12, further comprising:

the first screw and the second screw, wherein at least one of the first screw and the second screw is cannulated.

24. The system as in claim 12, wherein the nail further comprises internal threads.

25. The system as in claim 12, wherein the nail defines a third screw trajectory extending from a third distal opening to a third proximal opening.

26. The system as in claim 12, wherein the nail further defines a third screw trajectory through the nail.