Intramedullary implant with proximal plate and method for its use

Patent metadata

Field	Value
Publication number	US-12150681-B2
Application number	US-202318163927-A
Country	US
Kind code	B2
Filing date	Feb 3, 2023
Priority date	Sep 15, 2016
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

An orthopedic implant is specifically configured for use in osteotomies, in which part of the implant extends into an intramedullary portion of a first bone segment and a plate portion is external to the cortical surface of an adjacent bone segment to fix the segments to allow them to fuse. The body of the implant has a first end and a second end where the end which is inserted into the bone has a chamfer and a through hole having a hole axis optionally at an oblique angle to the longitudinal axis of the implant, and which can receive a screw, peg or pin. The second end of the implant includes a plate portion with at least two offset screws.

First claim

What is claimed is:

1. An implant for an osteotomy of an associated long bone, comprising:
a plate defining one or more through holes each being suitable for receiving a plate fastener; and
a body having a first end and a second end joined by a curved surface with a through hole defined by the body that is suitably oriented so as to accept a body fastener that is oriented perpendicular to the body so as to lodge within an intramedullary canal of a bone to thereby preclude rotation (i) within the canal and (ii) about the osteotomy site, the first end being swaged and the second end extending into the plate so as to form an integral two member implant.

2. An implant according to claim 1 , wherein the body further includes a through hole for a receiving a fastener.

3. An implant according to claim 2 , wherein the implant further includes a fastener for the plate portion.

4. An implant according to claim 3 , wherein the implant further includes a fastener for the body.

5. An implant according to claim 3 , wherein the through hole in the body defines an angle for the fastener that is perpendicular to a long axis of the body.

6. An implant according to claim 5 , wherein the first end is chamfered.

7. An implant according to claim 6 , wherein the first end includes a counterbore.

8. An implant according to claim 1 , wherein the plate includes two through holes each arranged so as to receive at least one fastener.

9. An implant according to claim 8 , wherein the through holes are locking through holes and the fasteners are locking fasteners.

10. An implant according to claim 1 , wherein the plate is a separate portion of the implant that is joined to the body in advance of a surgery.

11. An implant according to claim 1 , wherein the plate is offset from a long axis of the body.

12. An implant according to claim 1 , having at least two plate portions.

13. An implant according to claim 1 , wherein the through hole in the plate is offset from a long axis.

14. An implant according to claim 1 , wherein a bottom surface of the plate defines a longitudinal axis and includes a radius of curvature defined along the longitudinal axis.

15. An implant according to claim 14 , wherein the radius of curvature is defined by a section of a cylinder.

16. An implant for an osteotomy comprising:
a plate including at least one hole arranged and configured for receiving a fastener; and
a body having a first end and a second end joined together by an exterior surface formed along a long axis, configured to lodge within an intramedullary canal of a long bone, the exterior surface including at least two of grooves arranged in parallel relation to one another so as to provide for inhibition of implant rotation within the long bone, the first end being swaged to facilitate insertion into the long bone and defining a threaded through hole adjacent to the swaged portion of the first end and configured to receive a threaded fastener, wherein the second end extends into the plate so as to form an integral two member implant.

17. An implant for use during an osteotomy comprising:
a first portion configured to cooperate with a bone surface, the first portion defining at least one through hole; and
a cannulated body having a first end and a second end joined by an exterior surface formed along a long axis, configured to lodge within an intramedullary canal of a bone, the exterior surface including at least two flanges that spiral around the body and are arranged in tapering, spaced circumferential relation to the cannulation so as to inhibit the implant from rotating within the bone, the first end being swaged to facilitate insertion into the bone with a threaded through hole defined adjacent to the swage and configured to receive a threaded fastener, and the second end extending into the first portion so as to form an integral two member implant.

Assignees

• Wright Medical Tech Inc

Inventors

• Kay David B
• Perera Anthony
• Den Hartog Bryan
• Ducharme Dustin

Classifications

• A61B17/86

  Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)} · CPC title

• A61B17/1717

  for applying intramedullary nails or pins · CPC title

• A61B17/1782

  for the hand or wrist · CPC title

• A61B17/1775

  for the foot or ankle · CPC title

• A61B17/68

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