Graft fixation

• US 9,770,534 B2
• Filed: 04/16/2008
• Issued: 09/26/2017
• Est. Priority Date: 04/19/2007
• Status: Expired due to Fees

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Montes De Oca Balderas, Horacio, Brown, Malcolm, Howling, Graeme, Fenwick, Steve, Cotton, Nicholas, Brumfield, David
• Primary Examiner(s): Sharma, Yashita
• Application Number:
  US12/595,114
• Publication Number:
  US 20100145448A1
• Time in Patent Office: 3,450 Days
• Field of Search: 623 1311, 623 1314, 623 132, 623 2361, 623 2362, 606232, 606286, 606300-305, 606308, 604399
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• CPC Class Codes: A61B 2017/00871 polymeric
• CPC Class Codes: A61F 2/0811 Fixation devices for tendons or ligaments
• CPC Class Codes: A61F 2002/0852 Fixation of a loop or U-turn, e.g. eyelets, anchor having multiple holes
• CPC Class Codes: A61F 2002/0858 Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges
• CPC Class Codes: A61F 2002/0864 Fixation of tendon or ligament between anchor elements, e.g. by additional screws in the anchor, anchor crimped around tendon
• CPC Class Codes: A61F 2002/0888 Anchor in or on a blind hole or on the bone surface without formation of a tunnel
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61L 2400/16 Materials with shape-memory or superelastic properties
• CPC Class Codes: A61L 27/14 Macromolecular materials
• CPC Class Codes: A61L 27/50 Materials characterised by their function or physical properties , e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials

Abstract

The present disclosure relates to an anchor for fixating a tissue graft to bone. The anchor includes a through hole extending an entire length of the anchor and a polymer composition having shape memory qualities. Other anchors and methods for fixating a tissue graft to bone are also disclosed.

Claims

1. An anchor for fixating a tissue graft to bone, the anchor comprising:

an elongated body disposable into a bone tunnel in a bone and made from a shape-memory material, the elongated body comprising;

a non-tapered proximal portion, comprising;

a first concave outer surface extending longitudinally along the entire non-tapered proximal portion to define a first longitudinal channel along a first side of the elongated body wherein the first concave outer surface has a shape memory configured to compress a first tissue graft end portion against the bone tunnel wall in response to receiving a shape memory activation energy;

a first convex outer surface extending longitudinally along an entire second side of the non-tapered portion and configured to engage a bone tunnel wall of the bone when the elongated body is inserted into the bone tunnel; and

a tapered distal portion extending longitudinally from the non-tapered proximal portion wherein the-first concave outer surface extends longitudinally along the entire tapered distal portion.

2. The anchor of 1, further comprising a cavity extending longitudinally into the elongated body from a proximal end of the elongated body, the cavity shaped to receive a delivery device and/or a heating device.

3. The anchor of claim 2, wherein the non-tapered proximal portion further comprises:

a second concave outer surface extending longitudinally along the entire non-tapered proximal portion to define a second longitudinal channel along a third side of the elongated body opposite the first side of the elongated body wherein the second concave outer surface has a shape memory configured to compress a second tissue graft end portion against the bone tunnel wall in response to receiving the shape memory activation energy; and

a second convex outer surface extending longitudinally along an entire fourth side of the non-tapered portion opposite the second side of the non-tapered portion and configured to engage the bone tunnel wall of the bone when the elongated body is inserted into the bone tunnel.

4. The anchor of claim 3, wherein the second concave outer surface extends longitudinally along the entire tapered distal portion.