CA2372713A1 - Tissue scaffold anchor for cartilage repair - Google Patents

Tissue scaffold anchor for cartilage repair Download PDF

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Publication number
CA2372713A1
CA2372713A1 CA002372713A CA2372713A CA2372713A1 CA 2372713 A1 CA2372713 A1 CA 2372713A1 CA 002372713 A CA002372713 A CA 002372713A CA 2372713 A CA2372713 A CA 2372713A CA 2372713 A1 CA2372713 A1 CA 2372713A1
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CA
Canada
Prior art keywords
post
bone tissue
hole
platform
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002372713A
Other languages
French (fr)
Other versions
CA2372713C (en
Inventor
David W. Overaker
Joseph H. Contiliano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ethicon Inc
Original Assignee
Ethicon Inc
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Filing date
Publication date
Application filed by Ethicon Inc filed Critical Ethicon Inc
Publication of CA2372713A1 publication Critical patent/CA2372713A1/en
Application granted granted Critical
Publication of CA2372713C publication Critical patent/CA2372713C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • A61B17/064—Surgical staples, i.e. penetrating the tissue
    • A61B17/0643—Surgical staples, i.e. penetrating the tissue with separate closing member, e.g. for interlocking with staple
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    • A61B17/0642—Surgical staples, i.e. penetrating the tissue for bones, e.g. for osteosynthesis or connecting tendon to bone
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Abstract

A device for attaching a tissue replacement scaffold to a bone has a platform positionable in substantially parallel relationship to the bone for retaining the tissue scaffold proximate to the bone. A post extends from the platform and is insertable into a hole formed in the bone. One or more ribs extend from a side surface of the post along a portion of its length. The ribs have an increasing cross-sectional area to establish an increasing interference fit relative to the hole in the bone tissue. The ribs have a sharp edge that grips the sides of the hole in the bone such that the ribs restrict rotation or withdrawal of the device.

Claims (20)

1. A device for attaching a tissue scaffold to bone tissue, comprising:
a platform positionable in substantially parallel relationship to the bone tissue for retaining the tissue scaffold proximate to the bone tissue;
a post extending from the platform , said post insertable into a hole formed in the bone tissue;
at least one rib extending from a surface of said post along a portion of the length of said post from a first point distal to said platform to a second point intermediate said first point and said platform, said at least one rib having a cross-sectional area that increases along the length of said rib in the direction from said first point to said second point, said at least one rib establishing an interference fit relative to the hole in the bone tissue to prevent rotation of said device relative to the bone tissue.
2. The device of Claim 1, wherein said at least one rib is shorter in length than the depth of the hole in the bone tissue and has a diverging surface that diverges from the surface of said post in the direction from said first point to said second point, said at least one rib terminating proximate said second point in a sharp edge, said edge positionable within said hole for gripping the bone tissue to resist withdrawal of said device from the hole.
3. The device of Claim 2, wherein said rib expands in width in the direction from said first point to said second point.
4. The device of Claim 3, wherein said at least one rib has a shape approximating a portion of an elongated cone.
5. The device of Claim 4, wherein said at least one rib is a plurality of ribs disposed about the outer peripheral surface of said post.
6. The device of Claim 5, wherein said post has a chamfered end to aid in the introduction of said post into the hole in the bone tissue.
7. The device of Claim 6, wherein said device has a guide wire hole extending axially there through to permit said device to be slipped over a guide wire having one end thereof positioned in the hole for guiding said device into the hole.
8. The device of Claim 1, wherein said post extends from said platform at about 90 degrees.
9. The device of Claim 2, wherein said platform has a perforation therein to allow fluid and cell transmission through said perforation.
10. The device of Claim 2, wherein said device is formed from a material selected from the group consisting of biocompatible polymers, absorbable polymers, glasses, ceramics, metal oxides, bone tissue and therapeutic agents, alone or in combination.
11. The device of Claim 1, wherein said platform and said post are monolithically formed.
12. The device of Claim 1, wherein said platform and said post are independently formed elements.
13. The device of Claim 12, wherein said platform has a coupling pin extending from a surface thereof, said post having a hollow therein for matingly receiving said coupling pin to couple said platform and said post.
14. The device of Claim 13, further including a latch resiliently mounted on said coupling pin, said latch having a locking position and a withdrawn position, said latch permitting said coupling pin to be inserted into said hollow,in said post in a coupling relationship with said post when in said withdrawn position and retaining said coupling pin coupled to said post in said locking position.
15. A device for attaching a tissue scaffold to bone tissue, comprising:
attaching means for attaching the scaffold to said device;
retaining means coupled to said attaching means for retaining said attaching means in proximity to the bone tissue, said retaining means inserting into a hole formed in the bone tissue, said retaining means including gripping means extending from the outer periphery thereof for gripping the bone tissue proximate the hole to restrain said device from rotating or pulling away from the bone tissue.
16. The device of Claim 15, wherein said gripping means have a gradually increasing interference fit relative to the hole in the bone tissue.
17. The device of Claim 16, wherein said gripping means are fully insertable within the hole in the bone tissue and have a sharp edge which gouges into the bone tissue proximate the hole.
18. The device of Claim 17, wherein said attaching means has apertures therein for allowing the flow of fluids and cells there through.
19. The device of Claim 18, further including coupling means for coupling said attaching means and said retaining means.
20. The device of Claim 17 wherein said attaching means and said retaining means are formed from a composition with a porosity permitting ingrowth of cells.
CA2372713A 2001-02-26 2002-02-22 Tissue scaffold anchor for cartilage repair Expired - Fee Related CA2372713C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/793,693 US6743232B2 (en) 2001-02-26 2001-02-26 Tissue scaffold anchor for cartilage repair
US09/793,693 2001-02-26

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CA2372713A1 true CA2372713A1 (en) 2002-08-26
CA2372713C CA2372713C (en) 2010-06-08

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US (1) US6743232B2 (en)
EP (1) EP1234555B1 (en)
JP (1) JP4215988B2 (en)
AT (1) ATE353199T1 (en)
AU (1) AU784999B2 (en)
CA (1) CA2372713C (en)
DE (1) DE60217981T2 (en)
ES (1) ES2279853T3 (en)

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