Humeral Head Fixation Device for Osteoporotic Bone

• US 20170079703A1
• Filed: 12/07/2016
• Published: 03/23/2017
• Est. Priority Date: 09/14/2009
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Inventors: Schaller, Konrad, Niederberger, Alfred, Fierlbeck, Johann
• Granted Patent: US 10,448,984 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/7266 with fingers moving radially outwardly
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/8635 Tips of screws
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/8685 comprising multiple separate parts
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014

Abstract

A device includes an elongated body configured to be coupled to a bone stabilization implant so that, when the bone stabilization implant is mounted to a target bone, the body extends away from the bone stabilization implant at an angle selected so that the elongated body passes into a target portion of bone. The body defines a lumen therein extending to an opening in a distal end of the body. The device also includes a deploying member housed within the lumen of body for movement between a first position and a second position. In addition, the device includes a plurality of wires coupled to the deploying member so that movement of the deploying member through the lumen moves the wires between an insertion position and a deployed position in which the distal ends of the wires penetrate a portion of bone adjacent to the distal end of the body.

Claims

1-17. -17. (canceled)

18. A method for treating a bone, comprising:

inserting a device to a desired position within a head portion of a target bone, the device including an elongated body having a lumen extending therethrough and a deploying member movably received within the lumen, the deploying member being coupled to a plurality of wires which, in an insertion configuration, are received within the lumen; and

moving the deploying member relative to the lumen to drive the wires distally out of the lumen so that the wires penetrate a portion of bone adjacent to a distal end of the elongated body to anchor the device to the target bone.

19. The method of claim 18, further comprising coupling the device to a bone stabilization implant coupled to an exterior of the target bone.

20. The method of claim 19, wherein inserting the device to the desired position includes rotating the device about a longitudinal axis thereof.

21. The method of claim 20, wherein the device is a screw coupled to the bone stabilization implant via a threading about a head portion of the screw.

22. The method of claim 19, wherein the wires are moved distally out of the lumen along a curved path.

23. The method of claim 19, wherein first and second ones of the wires are biased toward an anchoring shape in which distal portions thereof curve radially outward relative to a longitudinal axis of the elongated body.

24. The method of claim 23, wherein, when in the anchoring shape, the wires curve through an angle between 90 and 180 degrees.

25. The method of claim 19, wherein the deploying member is a bolt threadedly engaging an inner surface of the lumen, rotation of the bolt in a first direction relative to the lumen moving the bolt longitudinally through the lumen.

26. The method of claim 25, further comprising removing the device from the target bone by rotating the bolt in a second direction relative to the elongated body so that the wires are retracted into the lumen of the elongated body.

27. The method of claim 19, wherein the wires are coupled to the deploying member via protrusions at proximal ends thereof.

28. The method of claim 19, wherein the bone stabilization implant is one of a bone plate, a nail and an anchoring element.