Implant for bone fixation

Patent metadata

Field	Value
Publication number	US-11596458-B2
Application number	US-202017091701-A
Country	US
Kind code	B2
Filing date	Nov 6, 2020
Priority date	Nov 11, 2016
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

Disclosed herein is an implant for bone fixation comprising an elongated member configured to be wound around bone parts that are to be fixed, an engagement member coupled to the elongated member and configured to engage a portion of the elongated member so as to secure the implant in a loop around the bone parts, and a fastening member arranged between and coupled to the elongated member and the engagement member. The fastening member comprises at least two separate pieces each comprising one opening for receiving a bone fastener, wherein the separate pieces are coupled to each other by a material having a lower material strength than a material from which the separate pieces are made.

First claim

The invention claimed is:

1. An implant for bone fixation, comprising:
an elongated member configured to be wound around bone parts that are to be fixed;
an engagement member coupled to the elongated member and configured to engage a portion of the elongated member so as to secure the elongated member in a loop around the bone parts;
a fastening member coupled to the elongated member and the engagement member,
wherein the fastening member comprises at least two separate pieces coupled to one another each comprising at least one opening for receiving a bone fastener, and
wherein the separate pieces are coupled to each other by a material having a lower material strength than a material from which the separate pieces are made such that the material having the lower material strength is easier to cut in order to detach the implant after implantation.

2. The implant of claim 1 , wherein the separate pieces are substantially aligned with a longitudinal axis of the elongated member of the implant when the implant is in a straight, unwound state.

3. The implant of claim 1 , wherein the separate pieces are plates made from a metallic material.

4. The implant of claim 1 , wherein the material coupling the separated pieces to each other is a polymeric material.

5. The implant of claim 1 , further comprising:
at least one visual indicator in a region of lower material strength between the separate pieces.

6. The implant of claim 1 , wherein the fastening member is coupled to at least one of the elongated member and the engagement member by injection molding.

7. The implant of claim 6 , wherein the visual indicator is defined by a portion of the fastening member that remains exposed from injection molding.

8. The implant of claim 1 , wherein the elongated member has a bone-contacting surface and at least one first side extending substantially perpendicular to the bone-contacting surface and comprising a plurality of engagement features along a longitudinal extent of the at least one first side, and wherein the engagement member comprises at least one complementary deflectable engagement feature configured to engage at least one of the plurality of engagement features.

9. The implant of claim 8 , wherein the elongated member comprises a second side opposite to the first side, and wherein the engagement features of the elongated member are arranged on both sides of the elongated member.

10. The implant of claim 9 , wherein the elongated member comprises a lateral step that defines the first side, and wherein the engagement features of the elongated member are arranged within the lateral step.

11. The implant of claim 10 , wherein the engagement member comprises at least one shoulder engaging with the lateral step.

12. The implant of claim 11 , wherein the shoulder and the at least one complementary deflectable engagement feature are offset in a longitudinal extension of the engagement member.

13. The implant of claim 11 , wherein the shoulder is closer to the elongated member than the at least one complementary deflectable engagement feature.

14. The implant of claim 8 , wherein a groove on a surface opposite the bone-contacting surface extends in a direction substantially perpendicular to a longitudinal axis of the elongated member of the implant.

15. The implant of claim 8 , wherein a groove on a surface opposite the bone-contacting surface extends in a direction substantially perpendicular to a longitudinal axis of the elongated member of the implant between the engagement member and the fastening member and/or between the fastening member and the elongated member.

16. The implant of claim 1 , wherein the engagement member and the fastening member are arranged within a common plane in a straight, unwound state of the implant.

17. The implant of claim 16 , wherein the engagement member comprises at least one deflectable engagement feature that substantially lies within the common plane, and/or that is deflectable within a plane which is parallel or orthogonal to the bone-contacting surface of the implant in a straight, unwound state thereof.

18. An implant for bone fixation, comprising:
an elongated member configured to be wound around bone parts that are to be fixed;
an engagement member coupled to the elongated member and configured to engage a portion of the elongated member so as to secure the elongated member in a loop around the bone parts;
a fastening member coupled to the elongated member and the engagement member,
wherein the fastening member comprises at least two separate pieces coupled to one another each comprising at least one opening for receiving a bone fastener,
wherein the elongated member comprises a lateral step and engagement features of the elongated member are arranged along a sidewall defined by the lateral step, and
wherein the engagement member comprises at least one shoulder engaging the lateral step.

19. The implant of claim 18 , wherein the separate pieces are substantially aligned with a longitudinal axis of the elongated member of the implant when the implant is in a straight, unwound state.

20. The implant of claim 18 , wherein the elongated member has a bone-contacting surface and at least one first side extending substantially perpendicular to the bone-contacting surface and comprising a plurality of engagement features along a longitudinal extent of the at least one first side, and wherein the engagement member comprises at least one complementary deflectable engagement feature configured to engage at least one of the plurality of engagement features.

Assignees

• Stryker European Operations Holdings Llc

Inventors

• Esser Matthias
• Marton Gheorghe
• Beutel Eva
• Knoepfle Christian
• Schmuck Manfred
• Greiner Karl

Classifications

• A61B17/842

  Flexible wires, bands or straps (A61B17/72, A61B17/82, A61B17/86 take precedence) · CPC title

• A61B2090/0807

  Indication means · CPC title

• A61B17/8076

  for the ribs or the sternum · CPC title

• A61B2017/00526

  Methods of manufacturing · CPC title

• A61B17/82

  for bone cerclage {(apparatus for manipulating wires or straps A61B17/8861; wires, bands or straps other than cerclage A61B17/842)} · CPC title