Implant for bone fixation

Patent metadata

Field	Value
Publication number	US-11259853-B2
Application number	US-201916374942-A
Country	US
Kind code	B2
Filing date	Apr 4, 2019
Priority date	Jan 9, 2015
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

An implant for bone fixation is presented. The implant comprises an elongated member configured to be wound around bone parts that are to be fixed. Further, an engagement feature is provided that is 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. A fastening member is arranged between and coupled to the elongated member and the engagement member. The fastening member comprises at least one opening for receiving a bone fastener. In one variant, at least one visual indicator indicating a region of the fastening member to be severed in order to detach the implant is provided. In another variant, at least one of the engagement member and the elongated member are coupled to the fastening member by injection molding.

First claim

The invention claimed is:

1. An implant for bone fixation, comprising:
an elongated member defining a first end and a second end, the elongated member configured to be wound around bone portions of a sternum of a patient that are to be fixed;
a fastening member coupled to the second end of the elongated member, the fastening member including at least one opening for receiving a bone fastener; and
an engagement member coupled to the fastening member and spaced apart from the second end of the elongated member, the engagement member configured to engage a portion of the elongated member located between the first and second ends so as to secure the implant in a loop around the bone portions,
wherein the fastening member includes at least one region configured to be severed in order to open the implant and access the sternum.

2. The implant of claim 1 , wherein the at least one region configured to be severed has reduced mechanical strength.

3. The implant of claim 1 , wherein the fastening member is coupled to the second end of the elongated member by a first injection molding process.

4. The implant of claim 3 , wherein the engagement member is injection molded to the fastening member in a second injection molding process separate from the first injection molding process.

5. The implant of claim 3 , wherein the at least one region configured to be severed is defined by a portion of the fastening member that remains exposed from the first injection molding process.

6. The implant of claim 1 , wherein the at least one region configured to be severed includes a visual indicator that extends in a direction substantially perpendicular to an extension of the elongated member.

7. The implant of claim 1 , wherein the at least one opening includes a first opening and a second opening and wherein the at least one region configured to be severed is located between the first opening and the second opening.

8. The implant of claim 7 , wherein the first opening is configured to be located proximate to a first bone portion and the second opening is configured to be located proximate to a second bone portion to be fixed.

9. The implant of claim 1 , wherein the at least one opening includes four openings, each of the openings being configured to receive a bone fastener.

10. The implant of claim 1 , wherein the at least one opening includes eight openings, each of the openings being configured to receive a bone fastener.

11. An implant for bone fixation, comprising:
an elongated member configured to be wound around bone portions of a sternum of a patient that are to be fixed;
a fastening member coupled to the elongated member by injection molding, the fastening member including at least one opening for receiving a bone fastener; and
an engagement member coupled to the fastening member and configured to engage a portion of the elongated member so as to secure the implant in a loop around the bone portions,
wherein the fastening member includes at least one visual indicator having a region of reduced mechanical strength, the at least one visual indicator indicating a region of the fastening member to be severed in order to open the implant and access the sternum.

12. The implant of claim 11 , wherein the engagement member is injection molded to the fastening member.

13. The implant of claim 11 , wherein the elongated member comprises a plurality of engagement features provided along an extension of the elongated member, and wherein the engagement member is configured to be brought into selective engagement with one of the engagement features.

14. The implant of claim 11 , further comprising a hook coupled to the elongated member.

15. The implant of claim 11 , wherein the at least one opening of the fastening member comprises a locking feature configured to lock a bone fastener to the fastening member.

16. The implant of claim 15 , wherein the locking feature includes a circumferential lip.

17. The implant of claim 16 , further comprising a bone fastener including a thread configured to engage the circumferential lip.

18. The implant of claim 11 , wherein the fastening member comprises a tapered portion surrounding the at least one opening, the tapered portion being configured to generate a compression force upon insertion of a bone fastener through the at least one opening.

19. The implant of claim 18 , wherein the tapered portion is one of a conical taper or a spherical taper.

20. The implant of claim 11 , wherein the fastening member comprises a metallic material and the elongated member comprises a polymeric material.

Assignees

• Stryker European Operations Holdings Llc

Inventors

• Knoepfle Christian
• Greiner Karl
• Schmuck Manfred

Classifications

• A61B17/8076 Primary

  for the ribs or the sternum · CPC title

• B29C45/14336

  Coating a portion of the article, e.g. the edge of the article (B29C45/14573 and B29C45/14598 take precedence) · CPC title

• B29L2031/7532

  Artificial members, protheses · CPC title

• A61B2090/037

  with a frangible part, e.g. by reduced diameter · CPC title

• A61B17/8052

  immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded · CPC title