Fixation devices and prostheses for soft tissue connection to the same

Patent metadata

Field	Value
Publication number	US-11857426-B2
Application number	US-202117545020-A
Country	US
Kind code	B2
Filing date	Dec 8, 2021
Priority date	Jul 31, 2018
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

An orthopedic assembly includes a tibial prosthesis that includes a body that defines an anterior side and a posterior side. The body further incudes a recess in the anterior side of the joint prosthesis and a plurality of openings that extend through the body from the anterior side to the posterior side thereof. At least a first and second opening of the openings are positioned at respective lateral and medial sides of a longitudinal axis of the tibial prosthesis. A modular insert is positioned within the recess of the body such that at least a portion of the modular insert is positioned between the openings of the body. The modular insert is formed separately from the tibial prosthesis and has a porous outer surface to promote tissue ingrowth.

First claim

The invention claimed is:

1. An orthopedic assembly, comprising:
a tibial prosthesis having an anterior side, a posterior side, and first and second openings each extending therethrough from the anterior side to the posterior side, the first and second openings respectively being defined at least in part by a first sidewall, the first sidewall of the first opening including an interior convex surface portion extending along a length direction of the first opening such that a first width of the first opening at the convex surface portion is narrower than a second width of the first opening at one of the anterior and posterior sides; and
a filamentary fixation device made from a filamentary material having a longitudinal axis, a width, and a thickness, the width and thickness extending perpendicular to the longitudinal axis, the width being greater than the thickness, and the width and length defining a first side and an opposed second side of the filamentary fixation device,
wherein the filamentary fixation device extends through the first and second openings such that the first side of the filamentary fixation device faces outwardly away from the tibial prosthesis and the second side of the filamentary fixation device faces inwardly toward the tibial prosthesis.

2. The assembly of claim 1 , wherein the tibial prosthesis further includes a patch of porous material on the anterior side between the first and second openings.

3. The assembly of claim 1 , wherein the filamentary material is a woven material configured to promote tissue ingrowth.

4. The assembly of claim 1 , wherein the filamentary material includes first and second free ends and an intermediate portion disposed therebetween, the first and second free ends overlapping at the anterior side of the tibial prosthesis, the intermediate portion being positioned at the posterior side of the tibial prosthesis and extending between the first and second openings.

5. The assembly of claim 4 , wherein the intermediate portion extends perpendicular to a vertical plane bisecting the body of the tibial prosthesis, and the first and second free ends are oriented by the respective first and second openings such that they each extend therefrom in a direction oblique to the vertical plane.

6. The assembly of claim 1 , wherein the first and second openings each define an anterior aperture at the anterior side of the tibial prosthesis and a posterior aperture at the posterior side of the tibial prosthesis.

7. The assembly of claim 6 , wherein the first opening further comprises a second sidewall opposing the first side wall, the first sidewall being closer to a longitudinal axis of the tibial prosthesis than the second sidewall.

8. The assembly of claim 7 , wherein the second sidewall includes a second convex surface portion such that apices of the first and second convex surface portions define a neck of the first opening.

9. The assembly of claim 7 , wherein the anterior and posterior apertures of each opening are elliptical in shape.

10. The assembly of claim 6 , wherein the anterior aperture is triangular, and the posterior aperture is pill shaped.

11. The assembly of claim 1 , wherein the tibial prosthesis includes a metaphyseal portion and diaphyseal portion, the metaphyseal portion defining a tibial tray configured to receive a tibial insert for articulation with a femoral component, the diaphyseal portion being configured to connect to a diaphysis of a tibia, the first and second openings extending through the metaphyseal portion.

12. An orthopedic assembly, comprising:
a tibial prosthesis having an anterior side, a posterior side, and first and second openings extending therethrough from the anterior side to the posterior side, the first and second openings each defining an anterior aperture and a posterior aperture and each being defined by a first sidewall and a second sidewall; and
a filamentary fixation device having first and second free ends extending from the respective first and second openings and an intermediate portion extending between the first and second openings, the intermediate portion having a first orientation and the first and second free ends engaging the first sidewall so that they each have a second orientation different from the first orientation,
wherein the first opening tapers from the anterior aperture and from the posterior aperture such that an interior portion of the first opening has an interior width dimension less than a first exterior width dimension of the first opening at the anterior aperture or a second exterior width dimension of the first opening at the posterior aperture,
wherein the interior portion of the first opening includes a convex surface portion extending along a length direction of the first opening.

13. The assembly of claim 12 , wherein the anterior aperture is elliptical.

14. The assembly of claim 12 , wherein the second sidewall is parallel to a longitudinal axis of the tibial prosthesis.

15. The assembly of claim 14 , wherein the second sidewall tilts away from the longitudinal axis of the tibial prosthesis along a traversal of the first sidewall from the posterior aperture to the anterior aperture.

16. The assembly of claim 12 , wherein the filamentary fixation device is an elongate flat strip of filamentary material.

17. The assembly of claim 16 , wherein the filamentary fixation device comprises a plurality of layers of mesh material.

18. The assembly of claim 12 , wherein the first and second free ends of the filamentary fixation device overlap to form an X-shaped shaped arrangement.

19. The assembly of claim 18 , wherein the tibial prosthesis includes a patch of porous material between the first and second openings.

Assignees

• Howmedica Osteonics Corp

Inventors

• Servidio Damon J
• Letson G Douglas
• Hanssen Arlen Dale
• Mcgovern Michael A
• Grunden Jennifer

Classifications

• A61F2/389 Primary

  Tibial components (A61F2/3868 takes precedence) · CPC title

• A61F2/30771

  applied in original prostheses, e.g. holes or grooves · CPC title

• A61F2/30907

  Nets or sleeves applied to surface of prostheses or in cement · CPC title

• A61F2/0811

  Fixation devices for tendons or ligaments · CPC title

• A61F2/367

  Proximal or metaphyseal parts of shafts (trochanteric devices connected to said proximal parts A61F2/30739) · CPC title