WO1990011735A1 - A prosthetic ligament - Google Patents

A prosthetic ligament Download PDF

Info

Publication number
WO1990011735A1
WO1990011735A1 PCT/GB1990/000464 GB9000464W WO9011735A1 WO 1990011735 A1 WO1990011735 A1 WO 1990011735A1 GB 9000464 W GB9000464 W GB 9000464W WO 9011735 A1 WO9011735 A1 WO 9011735A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
prosthetic ligament
ligament
prosthetic
width
Prior art date
Application number
PCT/GB1990/000464
Other languages
French (fr)
Inventor
Julian Garth Ellis
Original Assignee
Ellis Developments Limited
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 Ellis Developments Limited filed Critical Ellis Developments Limited
Publication of WO1990011735A1 publication Critical patent/WO1990011735A1/en

Links

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

Definitions

  • a PROSTHETIC LIGAMENT This invention relates to a prosthetic ligament, particularly but not exclusively for replacement of the medial collateral ligament and lateral collateral ligament of a knee.
  • the ligaments of a knee joint such as the anterior cruciate ligament, the medial collateral ligament and the lateral collateral ligament are damaged or ruptured.
  • the prior art provides a structure for replacing a damaged anterior cruciate ligament in European Patent Application No.0126520.
  • the present invention has been made from a consideration of this problem.
  • a prosthetic ligament comprising a length of fabric characterised in that the fabric is twisted through at least substantially 180° about a generally longitudinal axis, attachment means being provided adjacent the ends of the fabric for mounting the prosthetic ligament in position.
  • the fabric is preferably of non-uniform width and preferably woven.
  • the fabric In its untwisted condition the fabric preferably has the shape of a trapezium.
  • the position of the twist is a matter of choice, but preferably it is nearer one end than the other.
  • the fabric is twisted such that there is an even distribution of fabric about the axis of rotation.
  • the fabric is preferably of an open weave construction.
  • the transverse ends of the fabric are preferably considerably denser than the remainder of the fabric. For example with a greater number of picks per unit length.
  • the attachment means may comprise mechanical fastening such as a washer and screw, or alternatively may comprise screws, staples, toggles and similar devices which pass through apertures provided in denser woven parts of the fabric and into the bone to which the ligament is to be attached.
  • the prosthetic ligament 10 comprises a length of fabric 12 such as an open weave fabric or lace.
  • the fabric 12 is of a trapezium shape. In this embodiment the length of the short side 13 of the trapezium is 15 mm and the length of the opposite side 14 is 30 mm.
  • the lower portion 15 of the fabric 10 is twisted about the longitudinal axis of the fabric 10 such that the lower portion 15 is disposed at at least one 180° interval relative to the upper portion 16 of the fabric 10.
  • the twisting of the fabric causes the warp yarns 17 to be collected at a single location 18 and each of the upper and lower portions 15, 16 of the fabric form triangles.
  • This arrangement of warp yarns provides an even distribution of warp yarns on either side of the axis of rotation and thereby when the prosthetic ligament is attached across a joint such as a knee joint, will provide an even transmission of the load across the joint comparable to that occurring in nature.
  • More twists may be provided at intervals along the central warp yarn.
  • Additional weft yarns 19 are provided in the region 20 of the sides 13, 14 of the fabric 10. These additional yarns provide increased fabric density in these regions 20, 21 for improved anchorage to the bone.
  • Washers (not shown) with projections extending from the perimeter thereof are pushed into the bone 23, 24 through locations 22 in the regions 20, 21 of the fabric adjacent sides 13, 14. The projections thereby extend into the bone 23, 24 and maintains the fabric 10 in position. A screw is then passed through the open central portion of the washer and into the bone.
  • Both the washer and screw are made from suitable material such as surgical stainless steel.
  • the open weave of the fabric allows tissue regeneration around the fabric.
  • the fabric therefore, acts as a scaffold for tissue regeneration.
  • the invention is not restricted to the described specific embodiment and many modifications and variations can be made.

Abstract

A prosthetic ligament, particularly for replacing the medial collateral ligament and the lateral collateral ligament comprising a strip of fabric (10) preferably of non-uniform width which is twisted (18) through 180° about a longitudinal axis. The ligament is fixed in position at or adjacent its ends (13, 14).

Description

A PROSTHETIC LIGAMENT This invention relates to a prosthetic ligament, particularly but not exclusively for replacement of the medial collateral ligament and lateral collateral ligament of a knee.
It is often the case that when a knee is injured, the ligaments of a knee joint such as the anterior cruciate ligament, the medial collateral ligament and the lateral collateral ligament are damaged or ruptured.
The prior art provides a structure for replacing a damaged anterior cruciate ligament in European Patent Application No.0126520.
Prior art proposals have failed to provide a satisfactory artificial structure for replacing a damaged medial collateral ligament or a lateral collateral ligament and such methods that currently exist usually involve concurrently replacing the anterior cruciate ligament or the posterior cruciate ligament.
The present invention has been made from a consideration of this problem.
According to the invention there is provided a prosthetic ligament comprising a length of fabric characterised in that the fabric is twisted through at least substantially 180° about a generally longitudinal axis, attachment means being provided adjacent the ends of the fabric for mounting the prosthetic ligament in position.
In a preferred embodiment of the invention the fabric is preferably of non-uniform width and preferably woven. In its untwisted condition the fabric preferably has the shape of a trapezium. The position of the twist is a matter of choice, but preferably it is nearer one end than the other. The fabric is twisted such that there is an even distribution of fabric about the axis of rotation. The fabric is preferably of an open weave construction. The transverse ends of the fabric are preferably considerably denser than the remainder of the fabric. For example with a greater number of picks per unit length.
The attachment means may comprise mechanical fastening such as a washer and screw, or alternatively may comprise screws, staples, toggles and similar devices which pass through apertures provided in denser woven parts of the fabric and into the bone to which the ligament is to be attached.
A specific embodiment of the invention will now be described with reference to the accompanying diagrams, in which:- Fig.l shows one embodiment of the invention; and Fig.2 shows diagrammatically the use of the embodiment of Fig.l for the repair of knee ligaments. Referring to the drawings, the prosthetic ligament 10 comprises a length of fabric 12 such as an open weave fabric or lace. The fabric 12 is of a trapezium shape. In this embodiment the length of the short side 13 of the trapezium is 15 mm and the length of the opposite side 14 is 30 mm.
The lower portion 15 of the fabric 10 is twisted about the longitudinal axis of the fabric 10 such that the lower portion 15 is disposed at at least one 180° interval relative to the upper portion 16 of the fabric 10. The twisting of the fabric causes the warp yarns 17 to be collected at a single location 18 and each of the upper and lower portions 15, 16 of the fabric form triangles. This arrangement of warp yarns provides an even distribution of warp yarns on either side of the axis of rotation and thereby when the prosthetic ligament is attached across a joint such as a knee joint, will provide an even transmission of the load across the joint comparable to that occurring in nature.
More twists may be provided at intervals along the central warp yarn.
Additional weft yarns 19 are provided in the region 20 of the sides 13, 14 of the fabric 10. These additional yarns provide increased fabric density in these regions 20, 21 for improved anchorage to the bone.
In use the arrangement as previously described is attached across the knee joint as shown in Fig.2 to replace either the medial collateral ligament or the lateral collateral ligament.
Washers (not shown) with projections extending from the perimeter thereof are pushed into the bone 23, 24 through locations 22 in the regions 20, 21 of the fabric adjacent sides 13, 14. The projections thereby extend into the bone 23, 24 and maintains the fabric 10 in position. A screw is then passed through the open central portion of the washer and into the bone.
Both the washer and screw are made from suitable material such as surgical stainless steel.
Flexing of the knee joint causes longitudinal elongation of the fabric. As previously stated, the arrangement of the fabric as described provides an appropriate transmission of the load across the knee joint.
Also, the open weave of the fabric allows tissue regeneration around the fabric. The fabric, therefore, acts as a scaffold for tissue regeneration. The invention is not restricted to the described specific embodiment and many modifications and variations can be made.

Claims

1. A prosthetic ligament comprising a length of fabric characterised in that the fabric is twisted through at least substantially 180° about a generally longitudinal axis, attachment means being provided adjacent the ends of the fabric for mounting the prosthetic ligament in position.
2. A prosthetic ligament as claimed in Claim 1, wherein the fabric is of non-uniform width.
3. A prosthetic ligament as claimed in Claim 1 or Claim 2 wherein the fabric is woven, preferably of open weave construction.
4. A prosthetic ligament as claimed in any preceding claim, wherein the width of the fabric at one end is less than the width of the fabric at the other end.
5. A prosthetic ligament as claimed in any preceding claim, wherein the twist is formed at a location spaced from the mid point of the fabric.
6. A prosthetic ligament as claimed in Claim 4 and Claim 5, wherein the twist is formed nearer said one end than the other end.
7. A prosthetic ligament as claimed in any preceding claim, wherein the fabric is of substantially trapezoidal shape in the untwisted condition.
8. A prosthetic ligament as claimed in any preceding claim, wherein the ends of the fabric are more dense.
9. A prosthetic ligament as claimed in any preceding claim, wherein the attachment means comprises a mechanical fastening.
PCT/GB1990/000464 1989-04-01 1990-03-29 A prosthetic ligament WO1990011735A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898907420A GB8907420D0 (en) 1989-04-01 1989-04-01 A prosthetic ligament
GB8907420.7 1989-04-01

Publications (1)

Publication Number Publication Date
WO1990011735A1 true WO1990011735A1 (en) 1990-10-18

Family

ID=10654353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000464 WO1990011735A1 (en) 1989-04-01 1990-03-29 A prosthetic ligament

Country Status (4)

Country Link
EP (1) EP0465526A1 (en)
AU (1) AU5336490A (en)
GB (1) GB8907420D0 (en)
WO (1) WO1990011735A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5458636A (en) * 1994-07-20 1995-10-17 U.S. Biomaterials Corporation Prosthetic device for repair and replacement of fibrous connective tissue
EP0744162A2 (en) * 1995-05-25 1996-11-27 Ellis Developments Limited Textile surgical implants
US5800543A (en) * 1993-03-31 1998-09-01 Surgicraft Limited Artificial ligament
WO2002030324A1 (en) * 2000-10-11 2002-04-18 Ellis Developments Limited A textile prosthesis
US7942104B2 (en) 2007-01-22 2011-05-17 Nuvasive, Inc. 3-dimensional embroidery structures via tension shaping
US7946236B2 (en) 2007-01-31 2011-05-24 Nuvasive, Inc. Using zigzags to create three-dimensional embroidered structures
US8074591B2 (en) 2006-09-25 2011-12-13 Nuvasive, Inc. Embroidery using soluble thread
US8591584B2 (en) 2007-11-19 2013-11-26 Nuvasive, Inc. Textile-based plate implant and related methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455690A (en) * 1980-11-06 1984-06-26 Homsy Charles A Structure for in vivo implanation
EP0126520A2 (en) * 1983-02-16 1984-11-28 Bahaa Botros Seedhom Prosthetic ligament and instruments for use in the surgical replacement of ligaments
EP0192949A1 (en) * 1982-09-10 1986-09-03 W.L. Gore & Associates, Inc. A method of making a synthetic prosthesis for replacing or repair of ligaments or tendons
DE2836921C2 (en) * 1978-08-24 1986-11-06 Sigri GmbH, 8901 Meitingen Tendon and ligament replacement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2836921C2 (en) * 1978-08-24 1986-11-06 Sigri GmbH, 8901 Meitingen Tendon and ligament replacement
US4455690A (en) * 1980-11-06 1984-06-26 Homsy Charles A Structure for in vivo implanation
EP0192949A1 (en) * 1982-09-10 1986-09-03 W.L. Gore & Associates, Inc. A method of making a synthetic prosthesis for replacing or repair of ligaments or tendons
EP0126520A2 (en) * 1983-02-16 1984-11-28 Bahaa Botros Seedhom Prosthetic ligament and instruments for use in the surgical replacement of ligaments

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5800543A (en) * 1993-03-31 1998-09-01 Surgicraft Limited Artificial ligament
US5458636A (en) * 1994-07-20 1995-10-17 U.S. Biomaterials Corporation Prosthetic device for repair and replacement of fibrous connective tissue
EP0744162A2 (en) * 1995-05-25 1996-11-27 Ellis Developments Limited Textile surgical implants
EP0744162A3 (en) * 1995-05-25 1997-12-03 Ellis Developments Limited Textile surgical implants
WO2002030324A1 (en) * 2000-10-11 2002-04-18 Ellis Developments Limited A textile prosthesis
US7338531B2 (en) * 2000-10-11 2008-03-04 Julian Ellis Textile prosthesis
US7828855B2 (en) * 2000-10-11 2010-11-09 Nuvasive, Inc. Textile prosthesis
US20110054610A1 (en) * 2000-10-11 2011-03-03 Julian Ellis Textile Prosthesis
US8074591B2 (en) 2006-09-25 2011-12-13 Nuvasive, Inc. Embroidery using soluble thread
US7942104B2 (en) 2007-01-22 2011-05-17 Nuvasive, Inc. 3-dimensional embroidery structures via tension shaping
US7946236B2 (en) 2007-01-31 2011-05-24 Nuvasive, Inc. Using zigzags to create three-dimensional embroidered structures
US8591584B2 (en) 2007-11-19 2013-11-26 Nuvasive, Inc. Textile-based plate implant and related methods

Also Published As

Publication number Publication date
AU5336490A (en) 1990-11-05
GB8907420D0 (en) 1989-05-17
EP0465526A1 (en) 1992-01-15

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