CA2407108A1 - Improved interference screw having increased upper diameter - Google Patents

Improved interference screw having increased upper diameter Download PDF

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Publication number
CA2407108A1
CA2407108A1 CA002407108A CA2407108A CA2407108A1 CA 2407108 A1 CA2407108 A1 CA 2407108A1 CA 002407108 A CA002407108 A CA 002407108A CA 2407108 A CA2407108 A CA 2407108A CA 2407108 A1 CA2407108 A1 CA 2407108A1
Authority
CA
Canada
Prior art keywords
interference screw
threaded section
proximal
distal
bone
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
CA002407108A
Other languages
French (fr)
Other versions
CA2407108C (en
Inventor
Hugh S. Jr. West
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.)
HS West Investments LLC
Original Assignee
HS West Investments LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HS West Investments LLC filed Critical HS West Investments LLC
Publication of CA2407108A1 publication Critical patent/CA2407108A1/en
Application granted granted Critical
Publication of CA2407108C publication Critical patent/CA2407108C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0847—Mode of fixation of anchor to tendon or ligament
    • A61F2002/0858—Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0876—Position of anchor in respect to the bone
    • A61F2002/0882—Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone

Abstract

An interference screw for affixing soft tissue grafts during anterior cruciate ligament (ACL) reconstruction comprises a threaded body axially extending between a face and a tip along a central axis, with the face advantageously being obliquely aligned with the central axis. The threaded body includes a proximal threaded section and a distal threaded section, each of which may be straight or tapered. The proximal threaded section is approximately 1 mm larger in diameter than the distal threaded section. The increased diameter of the proximal threaded section enables the interference screw to compressively secure the soft tissue graft against the cortical bone, while the distal threaded section compresses the soft tissue graft against the cancellous bone with an appropriately reduced force that is appropriate for facilitating bonding of the soft tissue graft to the cancellous bone and that is sufficient for minimizing any "bungee effect."

Claims (22)

1. An interference screw for use in securing a tissue graft to a bone, comprising:
a threaded body extending between a proximal end and a distal end along a central axis and being sized and configured for threadable insertion into a bone tunnel, the threaded body further comprising:
a proximal threaded section having an average diameter and an angled face with an angle relative to the central axis in a range of about 10° to about 80°; and a distal threaded section, disposed between the proximal threaded section and the distal end, having an average diameter that is less than the average diameter of the proximal threaded section.
2. An interference screw as defined in claim 1, further including a recess, centered on the central axis and extending from the face at least partially through the interference screw, that is sized and configured to receive at least a portion of a drive shaft of a driver used to threadably insert the interference screw into a bone tunnel.
3. An interference screw as defined in claim 1, further including a tapered section disposed between the distal threaded section and the distal end that facilitates insertion of the distal end of the interference screw into a bone tunnel.
4. An interference screw as defined in claim 1, wherein the proximal threaded section is separated from the distal threaded section by a transition section.
5. An interference screw as defined in claim 4, wherein the transition section is threaded and tapered.
6. An interference screw as defined in claim 1, wherein the threaded body includes a single continuous thread of continuous pitch and helix angle extending between the proximal and distal ends, the interference screw optionally including a non-threaded portion adjacent at least one of the proximal or distal ends.
7. An interference screw as defined in claim 1, wherein the angle of the face corresponds to an angle of a bone tunnel into which the interference screw is threadably inserted so that, upon threadably inserting the interference screw into the bone tunnel, the face is substantially parallel to a bone surface surrounding the bone tunnel when the interference screw is oriented at an appropriate rotational angle.
8. An interference screw as defined in claim 1, wherein the face has an angle relative to the central axis in a range of about 20°
to about 60°.
9. An interference screw as defined in claim 1, wherein the face has an angle relative to the central axis in a range of about 30°
to about 40°.
10. An interference screw as defined in claim 1, wherein at least one of the proximal and distal threaded sections has a constant diameter.
11. An interference screw as defined in claim 1, wherein at least one of the proximal and distal threaded sections is at least partially tapered.
12. An interference screw as defined in claim 1, wherein the bone tunnel is surrounded by a cortical bone region extending from a bone surface and a cancellous bone region extending beneath the cortical bone region, wherein the proximal threaded section of the interference screw is sized so as to lie substantially within the cortical bone region, and the second threaded section is sized so as to lie substantially within the cancellous bone region, when the interference screw is completely inserted into the bone tunnel.
13. An interference screw as defined in claim 1, wherein the interference screw comprises at least one of poly-Hactic acid, titanium, or stainless steel.
14. An interference screw as defined in claim 1, wherein the average diameter of the proximal threaded section is in a range of about mm to about 12 mm and the average diameter of the distal threaded section is in a range of about 9 mm to about 11 mm.
15. An interference screw as defined in claim 1, wherein the average diameter of the proximal threaded section is about 1 mm greater than the average diameter of the distal threaded section.
16. An interference screw as defined in claim 1, wherein the interference screw has a length in a range of about 35 mm to about 40 mm.
17. An interference screw for use in securing a tissue graft to a bone, comprising:
a threaded body extending between a proximal end and a distal end along a central axis and being sized and configured for threadable insertion into a bone tunnel, the threaded body further comprising:
a proximal threaded section sized and configured so as to lie adjacent cortical bone when the interference screw is completely inserted into the bone tunnel, the proximal threaded section having an average diameter that is constant throughout at least a portion of the proximal threaded section;
a distal threaded section sized and configured so as to lie adjacent cancellous bone when the interference screw is completely inserted into the bone tunnel, the distal threaded section having an average diameter that is constant throughout at least a portion of the distal threaded section, wherein the average diameter of the distal threaded section is less than the average diameter of the proximal threaded section;
a single continuous thread of uniform pitch extending between the proximal and distal ends; and a recess, centered on the central axis and extending from the proximal end at least partially through the interference screw, that is sized and configured to receive at least a portion of a drive shaft of a driver used to threadably insert the interference screw into a bone tunnel.
18. An interference screw as defined in claim 17, wherein the bone tunnel is formed at a predetermined angle relative to a bone surface surrounding the bone tunnel and wherein the proximal threaded section further includes a face that is obliquely angled relative to the central axis so that, upon threadably inserting the interference screw into the bone tunnel, the face is substantially parallel to the bone surface when the interference screw is oriented at an appropriate rotational angle.
19. An interference screw as defined in claim 17, further including a tapered section disposed between the distal threaded section and the distal end that facilitates insertion of the distal end of the interference screw into a bone tunnel, wherein the tapered section is optionally threaded.
20. An interference screw as defined in claim 17, wherein the proximal threaded section is separated from the distal threaded section by a threaded and tapered transition section.
21. An interference screw for use in securing a tissue graft to a bone, comprising:
a threaded body extending between a proximal end and a distal end along a central axis and being sized and configured for threadable insertion into a bone tunnel, the threaded body further comprising:
a proximal threaded section sized and configured so as to lie adjacent cortical bone when the interference screw is completely inserted into the bone tunnel, the proximal threaded section having an average diameter that is constant throughout at least a portion of the proximal threaded section, the proximal threaded section including an angled face with an angle relative to the central axis in a range of about 10° to about 80°;
a distal threaded section sized and configured so as to lie adjacent cancellous bone when the interference screw is completely inserted into the bone tunnel, the distal threaded section having an average diameter that is constant throughout at least a portion of the distal threaded section, wherein the average diameter of the distal threaded section is less than the average diameter of the proximal threaded section; and a single continuous thread of uniform pitch extending between the proximal and distal ends.
22. A method of securing a tissue graft within a bone tunnel of constant diameter using an interference screw of discontinuous taper having portions of varying diameter.
CA2407108A 2001-10-12 2002-10-09 Improved interference screw having increased upper diameter Expired - Lifetime CA2407108C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/977,154 2001-10-12
US09/977,154 US6953463B2 (en) 2001-10-12 2001-10-12 Interference screws having increased proximal diameter

Publications (2)

Publication Number Publication Date
CA2407108A1 true CA2407108A1 (en) 2003-04-12
CA2407108C CA2407108C (en) 2010-01-26

Family

ID=25524882

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2407108A Expired - Lifetime CA2407108C (en) 2001-10-12 2002-10-09 Improved interference screw having increased upper diameter

Country Status (7)

Country Link
US (1) US6953463B2 (en)
EP (1) EP1302180B1 (en)
AT (1) ATE396666T1 (en)
AU (1) AU2002301325B2 (en)
CA (1) CA2407108C (en)
DE (1) DE60226823D1 (en)
ES (1) ES2307693T3 (en)

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Also Published As

Publication number Publication date
ATE396666T1 (en) 2008-06-15
US6953463B2 (en) 2005-10-11
EP1302180A2 (en) 2003-04-16
EP1302180B1 (en) 2008-05-28
EP1302180A3 (en) 2004-02-25
AU2002301325B2 (en) 2007-06-14
DE60226823D1 (en) 2008-07-10
CA2407108C (en) 2010-01-26
ES2307693T3 (en) 2008-12-01
US20030074002A1 (en) 2003-04-17

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Effective date: 20221011