Fixation Devices And Prostheses For Soft Tissue Connection To The Same

Patent metadata

Field	Value
Publication number	US-2020038192-A1
Application number	US-201916524534-A
Country	US
Kind code	A1
Filing date	Jul 29, 2019
Priority date	Jul 31, 2018
Publication date	Feb 6, 2020
Grant date	—

Abstract

An orthopedic assembly includes a tibial prosthesis that includes a body that defines an anterior side and a posterior side. The body further includes 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

1 . An orthopedic assembly comprising:
a tibial prosthesis having a body defining an anterior side and a posterior side, the body further defining a recess in the anterior side of the joint prosthesis and a plurality of openings extending through the body from the anterior side to the posterior side thereof, at least a first and second opening of the openings being positioned at respective lateral and medial sides of a longitudinal axis of the tibial prosthesis; and a modular insert 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 being formed separately from the tibial prosthesis and having a porous outer surface to promote tissue ingrowth.

2 . The assembly of claim 1 , further comprising a filamentary fixation device extending through the first and second openings.

3 . The assembly of claim 2 , wherein the filamentary fixation device has a first free end and a second free end, the first and second free ends extending through the respective first and second openings such that the first and second free ends are positioned at the anterior side of the body.

4 . The orthopedic assembly of claim 3 , wherein the filamentary fixation device comprises a mesh structure for securing soft tissue thereto.

5 . The orthopedic assembly of claim 4 , wherein the mesh structure comprises a plurality of layers.

6 . The orthopedic assembly of claim 5 , wherein the plurality of layers are connected by a continuous or interrupted seams.

7 . The orthopedic assembly of claim 2 , wherein a third opening of the openings in the body extends in a lateral-medial direction for receipt of a suture therethrough to connect the filamentary fixation device to the body.

8 . The orthopedic assembly of claim 1 , further comprising cannulated screws, the cannulated screws connecting the modular insert to the body via the first and second holes, the cannulated screws being cannulated such that they each include an opening extending entirely therethrough such that when they are received in the first and second openings of the body, such openings are not entirely occluded by the cannulated screws.

9 . The orthopedic assembly of claim 1 , wherein the modular insert includes a side-slot extending adjacent to an inner surface of the modular insert and a through-opening extending through the porous outer surface and inner surface such that the through-opening is in communication with the side-slot, the side-slot being at least partially defined by a rim.

10 . The orthopedic assembly of claim 9 , further comprising a threaded fastener having a head and a threaded shaft, the head having a cross-sectional dimension smaller than the through-opening of the modular insert and being dimensioned to be received within the side-slot between the rim and inner surface of the modular insert.

11 . The orthopedic assembly of claim 1 , wherein the first and second openings each define a posterior and anterior aperture, the anterior aperture having a triangular or elliptical shape.

12 . An orthopedic assembly comprising:
a tibial prosthesis having a body defining an anterior side and a posterior side, the body further defining first and second slots extending through the posterior and anterior sides of the body, the first and second slots each defining a posterior and anterior aperture, the anterior aperture having a triangular or elliptical shape; and a filamentary fixation device extending through the first and second slots.

13 . The assembly of claim 12 , wherein the posterior aperture has opposing parallel sides.

14 . The assembly of claim 13 , wherein the posterior aperture is pill-shaped or elliptically shaped.

15 . The orthopedic assembly of claim 12 , wherein each of the first and second slots are defined by a first and second sidewall, the first sidewall tilting away from a central longitudinal axis of the body.

16 . The assembly of claim 15 , wherein the first sidewall forms a hypotenuse of the triangular shaped anterior aperture.

17 . The assembly of claim 12 , wherein the first sidewall is parallel to the central longitudinal axis at the posterior aperture and gradually tilts away from the central longitudinal axis along a traversal of the first sidewall from the posterior aperture to the anterior aperture.

18 . The assembly of claim 12 , wherein the first sidewall decreases in a superior-inferior height along its traversal from the posterior aperture to the anterior aperture, and the second sidewall maintains a constant superior-inferior height along its traversal from the posterior aperture to the anterior aperture.

19 . The assembly of claim 12 , wherein the first sidewall curves about the central longitudinal axis of the body.

20 . The assembly of claim 19 , wherein the first sidewall is convexly curved and the second sidewall is concavely curved.

Assignees

• Howmedica Osteonics Corp

Inventors

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

Classifications

• A61F2002/0852

  Fixation of a loop or U-turn, e.g. eyelets, anchor having multiple holes · CPC title

• A61F2002/30914

  Details of the mesh structure, e.g. disposition of the woven warp and weft wires · CPC title

• A61F2002/3093

  for promoting ingrowth of bone tissue · CPC title

• A61F2/30771

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

• A61F2002/3092

  having an open-celled or open-pored structure · CPC title