Resorptive intramedullary implant between two bones or two bone fragments

Patent metadata

Field	Value
Publication number	US-12390255-B2
Application number	US-202519023819-A
Country	US
Kind code	B2
Filing date	Jan 16, 2025
Priority date	Sep 9, 2008
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

The invention relates to a resorptive intramedullary implant between two bones or two bone fragments. The implant includes a single-piece body ( 1 ) having a generally elongate shape and having, at each end, areas for anchoring to the bone portions in question, characterized in that one of said areas (A 1 ) has a cylindrical cross-section while the other area (A 2 ) has a flat cross-section.

First claim

The invention claimed is:

1. An intramedullary implant for use between first and second bone parts, the implant being a monolithic body comprising:
a first threaded end for anchoring to the first bone part; and
a second end extending from the first end for anchoring to the second bone part, the second end having:
a first anchor arm having a first tooth and a spaced apart second tooth, the first and second teeth extending from the first anchor arm in a first direction,
a second anchor arm having a third tooth extending from the second anchor arm in a second direction, the first and second directions being different, and
an opening between the first and second anchor arms to permit the first and second anchor arms to move with respect to each other.

2. The intramedullary implant of claim 1 , wherein the intramedullary implant is made of resorptive material.

3. The intramedullary implant of claim 1 , wherein the intramedullary implant is made of a polymer.

4. The intramedullary implant of claim 1 , further comprising a step having a step surface.

5. The intramedullary implant of claim 4 , wherein the step is formed between the first and second ends.

6. The intramedullary implant of claim 4 , wherein the intramedullary implant includes a longitudinal axis and the step defines a plane substantially perpendicular to the longitudinal axis.

7. The intramedullary implant of claim 1 , wherein the first tooth includes a first flat portion, the second tooth includes a second flat portion, and the third tooth includes a third flat portion.

8. The intramedullary implant of claim 7 , wherein the first, second and third flat portions are substantially coplanar.

9. The intramedullary implant of claim 7 , wherein the first, second, third and fourth flat portions are substantially coplanar.

10. The intramedullary implant of claim 1 , wherein the first tooth includes first and second opposing surface portions, the second tooth includes third and fourth opposing surface portions, and the third tooth includes fifth and sixth opposing surface portions.

11. The intramedullary implant of claim 10 , wherein each of the first, the third, and the fifth opposing surface portions define a first plane and each of the second, the fourth, and the sixth opposing surface portions define a second plane substantially parallel to the first plane.

12. The intramedullary implant of claim 1 , wherein the first and second anchor arms are elastically deformable.

13. The intramedullary implant of claim 1 , wherein the first and second ends are offset from each other.

14. An intramedullary implant for use between first and second bone parts, the implant being a monolithic body comprising:
a first threaded end for anchoring to the first bone part; and
a second end including:
a first anchor arm having a first tooth and a spaced apart second tooth, the first and second teeth extending from the first anchor arm in a first direction,
a second anchor arm having a third tooth and a spaced apart fourth tooth, the third and fourth teeth extending from the second anchor arm in a second direction, the first and second directions being different, and
an opening formed between the first and second anchor arms and adapted to enable elastic deformation of the first and second anchor arms, and

a step forming an abutment between the opposing ends adapted to prevent over insertion of the first threaded end into the first bone part.

15. The intramedullary implant of claim 14 , wherein the intramedullary implant is made of resorptive material.

16. The intramedullary implant of claim 14 , wherein the intramedullary implant is made of a polymer.

17. The intramedullary implant of claim 14 , wherein the intramedullary implant includes a longitudinal axis and the abutment defines a plane substantially perpendicular to the longitudinal axis.

18. The intramedullary implant of claim 14 , wherein the first tooth includes a first flat portion, the second tooth includes a second flat portion, the third tooth includes a third flat portion and the fourth tooth includes a fourth flat portion.

19. The intramedullary implant of claim 14 , wherein the first and second ends are offset from each other.

Assignees

• Stryker European Operations Holdings Llc

Inventors

• Prandi Bernard
• Augoyard Marc
• Ledermann Thomas
• Meusnier Tristan
• Peyrot Jacques
• Fellmann Judith

Classifications

• A61B2017/8655

  with special features for locking in the bone · CPC title

• A61B2017/681

  Alignment, compression, or distraction mechanisms · CPC title

• A61B2017/00862

  elastic or resilient · CPC title

• A61B17/88

  Osteosynthesis instruments;} Methods or means for implanting or extracting internal {or external} fixation devices {(A61B17/7074 takes precedence) · CPC title

• A61B17/1655

  for tapping · CPC title