Arthroplasty implant systems for generating and applying dynamic compression

Patent metadata

Field	Value
Publication number	US-11141283-B2
Application number	US-201916551938-A
Country	US
Kind code	B2
Filing date	Aug 27, 2019
Priority date	Jul 9, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

Arthroplasty implant systems and procedures are disclosed herein. In an embodiment, an arthroplasty implant of an arthroplasty system includes a shape memory material connecting member attached to two points of fixation of the arthroplasty implant.

First claim

What is claimed is:

1. An implant system, comprising:
a sleeve extending along a longitudinal axis between a proximal portion and a distal portion;
a proximal slider housed inside the proximal portion of the sleeve;
a distal slider housed inside the distal portion of the sleeve;
a Nitinol rod connected to both the proximal slider and the distal slider;
a first opening located within the proximal portion of the sleeve;
a first screw received through the first opening and the proximal slider;
a second opening located within the distal portion of the sleeve;
a second screw received through the second opening and the distal slider;
at least one of the first opening and the second opening is an elongated slot; and
a set screw removably inserted into either the proximal slider or the distal slider,
wherein the set screw is removable from the proximal slider or the distal slider to allow the Nitinol rod to superelastically shorten.

2. An implant system, comprising:
an elongated sleeve that extends along a longitudinal axis between a proximal portion and a distal portion;
a proximal interlocking fixation body located at least partially inside the proximal portion;
a distal interlocking fixation body located at least partially inside the distal portion;
a shape memory material connecting member attached to the proximal interlocking fixation body and the distal interlocking fixation body; and
a holding device removably connected to either the proximal interlocking fixation body or the distal interlocking fixation body.

3. The system as recited in claim 2 , wherein the elongated sleeve includes at least one opening configured to receive a fixation device.

4. The system as recited in claim 3 , wherein the proximal portion of the elongated sleeve includes a first opening and the distal portion of the elongated sleeve includes a second opening, and one of the first opening and the second opening is an elongated slot and the other of the first opening and the second opening is a round opening.

5. The system as recited in claim 2 , wherein the elongated sleeve is coated with a porous material.

6. The system as recited in claim 2 , wherein a first opening is located within the proximal portion of the elongated sleeve and receives a first screw, and a second opening is located within the distal portion of the elongated sleeve and receives a second screw.

7. The system as recited in claim 2 , wherein the shape memory material connecting member is a rod made of Nitinol (NiTi).

8. The system as recited in claim 2 , wherein the shape memory material connecting member includes an elongated shaft extending between a first threaded portion and a second threaded portion.

9. The system as recited in claim 2 , wherein at least one of the proximal interlocking fixation body and the distal interlocking fixation body is translatable within a cannulation of the elongated sleeve.

10. The system as recited in claim 2 , wherein the holding device is a set screw that is removable from the proximal interlocking fixation body or the distal interlocking fixation body to allow the shape memory material connecting member to superelastically shorten from a stretched position toward an unstretched position.

11. A method of performing a surgery, comprising:
inserting an implant system within a bone,
wherein the implant system includes a shape memory material connecting member that is pre-stretched from an unstretched position to a stretched position prior to inserting the implant system;
inserting a first fixation device through a first opening of the implant system;
inserting a second fixation device through a second opening of the implant system; and
removing a holding device from the implant system,
wherein removing the holding device superelastically shortens the shape memory material connecting member from the stretched position toward the unstretched position.

12. The method as recited in claim 11 , wherein the joint is an ankle joint.

13. The method as recited in claim 11 , comprising, prior to inserting the implant system:
reaming a passage in the bone for accommodating an elongated sleeve of the implant system.

14. The method as recited in claim 11 , wherein the first fixation device is a first screw and the second fixation device is a second screw.

15. The method as recited in claim 11 , wherein the shape memory material connecting member connects between a proximal interlocking fixation body and a distal interlocking fixation body of the implant system, and the holding device is a set screw that is connected to either the proximal interlocking fixation body or the distal interlocking fixation body, and wherein removing the holding device includes:
unscrewing the set screw from the proximal interlocking fixation body or the distal interlocking fixation body, thereby permitting the proximal interlocking fixation body or the distal interlocking fixation body to translate inside the implant system.

16. The method as recited in claim 15 , wherein permitting the proximal interlocking fixation body or the distal interlocking fixation body to translate inside the implant system moves the shape memory material connecting member from the stretched position back toward the unstretched position.

17. The method as recited in claim 15 , wherein either the proximal interlocking fixation body or the distal interlocking fixation body is fixed from movement prior to removing the set screw.

18. The method as recited in claim 11 , wherein inserting the first fixation device through the first opening of the implant system includes:
passing the first fixation device through a non-threaded opening of a proximal interlocking fixation body housed inside a sleeve of the implant system.

19. The method as recited in claim 11 , wherein inserting the second fixation device through the second opening of the implant system includes:
passing the second fixation device through a non-threaded opening of a distal interlocking fixation body housed inside a sleeve of the implant system.

Assignees

• Arthrex Inc

Inventors

• Fonte Matthew
• Garlock Adam

Classifications

• A61F2002/4207

  Talar components · CPC title

• A61B2017/00867

  shape memory effect · CPC title

• A61B17/68 Primary

  Internal fixation devices {, including fasteners and spinal fixators, even if a part thereof projects from the skin (bone staples A61B17/0642)} · CPC title

• A61F2/30749

  Fixation appliances for connecting prostheses to the body · CPC title

• A61F2002/30074

  stretchable · CPC title