Bone plates with dynamic elements

• US 10,299,842 B2
• Filed: 07/13/2016
• Issued: 05/28/2019
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Crossroads Extremity Systems, Llc (Johnson & Johnson)
• Original Assignee: Crossroads Extremity Systems, Llc (Johnson & Johnson)
• Inventors: Hollis, Michael Chad, Hartdegen, Vernon Raymond, Sayger, Daniel
• Primary Examiner(s): Coley, Zade
• Application Number:
  US15/209,623
• Publication Number:
  US 20170007305A1
• Time in Patent Office: 1,049 Days
• CPC Class Codes: A61B 17/0642 for bones, e.g. for osteosynthesis or connecting tendon to bone
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• CPC Class Codes: A61B 17/1728 for holes for bone plates or plate screws
• CPC Class Codes: A61B 17/8004 with means for distracting or compressing the bone or bones
• CPC Class Codes: A61B 17/8014 the extension or compression force being caused by interaction of the plate hole and the screws
• CPC Class Codes: A61B 17/8042 the additional component being a cover over the screw head
• CPC Class Codes: A61B 17/8057 the interlocking form comprising a thread
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 17/84 Fasteners therefor or fasteners being internal fixation devices
• CPC Class Codes: A61B 17/846 Nails or pins, i.e. anchors without movable parts, holding by friction only, with or without structured surface A61B17/72, A61B17/86 take precedence
• CPC Class Codes: A61B 17/848 Kirschner wires, i.e. thin, long nails
• CPC Class Codes: A61B 17/8605 Heads, i.e. proximal ends projecting from bone
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/8863 Apparatus for shaping or cutting osteosynthesis equipment by medical personnel
• CPC Class Codes: A61B 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 17/8888 at its central region
• CPC Class Codes: A61B 2017/0645 : being elastically deformed for insertion
• CPC Class Codes: A61B 2017/0647 : having one single leg, e.g. tacks
• CPC Class Codes: A61B 2090/062 : penetration depth

Abstract

Bone fixation systems include various combinations of stabilizing members, dynamic elements, fasteners, and locking mechanisms. Bone plates receive dynamic bone staples and bone screws. Other dynamic elements include elbow pegs, straight pegs, and wire pegs.

Claims

1. A bone fixation system comprising:

(i) a stabilizing member comprising;

an obverse side;

a reverse side opposite the obverse side;

a receiver comprising at least one elongate slot in the obverse side having a first slot end and a second slot end, wherein the slot comprises at least one opening through the reverse side and wherein the slot is aligned along a longitudinal axis of the stabilizing member and its perimeter is continuously surrounded by the obverse side; and

a plurality of fastener openings extending through the obverse side and the reverse side, wherein at least a first fastener opening is positioned proximate the first slot end and at least a second fastener opening is positioned proximate the second slot end;

(ii) a dynamic element comprising;

a bridge extending between a first bridge end and a second bridge end, wherein the bridge is configured to seat within the elongate slot of the receiver;

a first leg coupled to the first bridge end and extending from the bridge to a first free end, wherein the first leg is configured to extend through at least one opening in the receiver when the bridge is seated within the elongate slot of the receiver; and

a second leg coupled to the second bridge end and extending from the bridge to a second free end, wherein the second leg is configured to extend through at least one opening in the receiver when the bridge is seated within the elongate slot of the receiver;

wherein the first free end is separated from the second free end by a first distance when the dynamic element is in an elastically deformed state;

wherein the first free end is separated from the second free end by a second distance when the dynamic element is in a relaxed state, the first distance being greater than the second distance such that the dynamic element provides a compressive force between the first and second free ends when the bridge is seated within the elongate slot of the receiver and the dynamic element is in an elastically deformed state; and

(iii) a plurality of fasteners configured to be positioned within the one or more fasteners openings of the stabilizing member and to extend through the stabilizing member.

2. The system of claim 1, wherein the stabilizing member is a bone plate.

3. The system of claim 1, wherein the dynamic element is a bone staple.

4. The system of claim 1, wherein the receiver comprises a first receiver hole extending through the obverse and reverse sides and a second receiver hole extending through the obverse and reverse sides, wherein the first leg is configured to extend through the first receiver hole, wherein the second leg is configured to extend through the second receiver hole.

5. The system of claim 4, wherein the slot intersects the first receiver hole and extends toward the second receiver hole.

6. The system of claim 4, wherein the slot intersects the first and second receiver holes.

7. The system of claim 1, wherein the receiver comprises a web positioned within the slot.

8. The system of claim 1, wherein the fastener is a bone screw.

9. The system of claim 1, wherein the fastener is configured to rotate and translate within the fastener hole.

10. The system of claim 9, wherein the fastener is polyaxially positionable relative to the fastener hole.

11. The system of claim 1, wherein the receiver is configured to prevent the bridge from passing through the reverse side.

12. The system of claim 1, wherein the first fastener opening is positioned along the longitudinal axis beyond the first slot end.

13. The system of claim 12, wherein the second fastener opening is positioned along the longitudinal axis beyond the second slot end.

14. The system of claim 12, wherein the second fastener opening is positioned lateral to the longitudinal axis.

15. The system of claim 1, wherein the first fastener opening is positioned lateral to the longitudinal axis.

16. The system of claim 15, wherein the second fastener opening is positioned lateral to the longitudinal axis.

17. The system of claim 16, wherein the second fastener opening is positioned on an opposite lateral side of the longitudinal axis than the first fastener opening.

18. The system of claim 1, wherein the first slot end comprises a circular perimeter and the second slot end comprises a circular perimeter.

19. The system of claim 18, wherein the slot comprises straight edges between the first and second slot ends.

20. The system of claim 19, wherein the distance between the straight edges is less than the diameters of the circular first and second slot ends.

21. The system of claim 19, wherein the bridge of the dynamic element is configured to seat between the straight edges.

22. The system of claim 18, wherein the first and second slot ends comprise openings through the obverse and reverse sides, and wherein the first and second legs of the dynamic element are configured to extend through the openings in the first and second slot ends, respectively, when the bridge is seated within the slot.

23. The system of claim 1, wherein the dynamic element comprises a first projection extending from the first bridge end and a second projection extending from the second bridge end, said projections configured to engage an inserter and facilitate placing the dynamic element in the elastically deformed state.

24. The system of claim 1, wherein the slot comprises an opening through the reverse side that is coextensive with the entire slot.

25. The system of claim 1, wherein the slot comprises a web between opposite sides of the slot, and wherein the slot comprises openings through the reverse side that are coextensive with all portions of the slot other than the location of the web.

26. The system of claim 1, wherein when the bridge is seated within the elongate slot of the receiver, the first and second legs do not contact the stabilizing member.