EP0153831A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Instruments for use in the surgical replacement of ligaments
Assignee: Individual
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Filing: 1985-02-13
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Granted: —
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Expires: 2005-02-13
Abstract
Abstract This invention relates to a method and surgical instruments for use in the surgical replacement of a ligament and in particular for inserting a prosthetic ligament into the body. The surgical instruments include a bone plug extractor which is adapted to sever the base of the bone plug from a host bone to allow a complete separation of the bone plug. The instruments further include a clamp with a guide for locating the axis along which a bore is required for fixation of the ligament, a reamer cooperable with the clamp for removing an annulus of bone dust, and a cylindrical drill bit guide of the same outside diameter as the reamer and bone plug extractor.
Inventors
- 👤 Bahaa Botros Seedhom
- 👤 Kyosuke Fujikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 05:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0805; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1714; A61B17/1739; A61B17/1764
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
129 words
A tool for extracting a cylindrical bone plug from a bone in which an annular channel has been formed to define the periphery of said bone plug, said tool being adapted to sever the base of said plug from the bone to enable complete separation of the plug from the bone, the tool comprising: a grippable handle portion at one end; a wall portion at the other end, the wall portion defining a hollow, open-ended cylinder adapted to receive the bone plug; a longitudinally extending slot formed in the cylindrical wall; said wall being adapted to be received within said annular channel of said bone with the bone plug being receivable within the open-ended cylinder, said slot defining an arcuate void region of the annular space in the bone.
Claim 2
Dependent Claim
129 words
A tool for extracting a cylindrical bone plug from a bone in which an annular channel has been formed to define the periphery of said bone plug, said tool being adapted to sever the base of said plug from the bone to enable complete separation of the plug from the bone, the tool comprising: a grippable handle portion at one end; a wall portion at the other end, the wall portion defining a hollow, open-ended cylinder adapted to receive the bone plug; a longitudinally extending slot formed in the cylindrical wall; said wall being adapted to be received within said annular channel of said bone with the bone plug being receivable within the open-ended cylinder, said slot defining an arcuate void region of the annular space in the bone.
Claim 3
Dependent Claim
28 words
A bone plug extractor tool as defined in claim 1, wherein the angle circumscribed by said slot is between about 30° and less than 1 80 0 .
Claim 4
Dependent Claim
24 words
A bone plug extractor tool as defined in claim 1, wherein the angle circumscribed by said slot is from about 70° to about 90°.
Claim 5
Dependent Claim
34 words
A bone plug extractor tool as defined in claims 1 to 3, further comprising; " indicia means on the tool indicating that region of the tool which is diammetrically opposed to the longitudinal slot.
Claim 6
Dependent Claim
25 words
A bone plug extractor tool as defined in claim 4, wherein the indicia comprises a flattened bearing surface, said flattened bearing surface defining-a strikable surface.
Claim 7
Dependent Claim
82 words
A set of tools for use in the surgical replacement of prosthetic ligaments comprising a clamp with a guide for locating the axis along which a bore is required for fixation of a ligament, a reamer cooperable with the clamp for removing an annulus of bone dust, a bone plug extractor in accordance with claim 1, of the same outside diameter as the reamer, and a cylindrical drill bit guide of the same outside diameter as the reamer and bone plug extractor.
Claim 8
Dependent Claim
219 words
An orthopaedic tool for guiding a cylindrical reaming tool along a predetermined axis to form a replaceable bone plug from a host bone comprising: a first limb having a first pin at one end thereof, the pin being adapted to securely engage the bone; a second limb having a guide for the reaming tool at one end thereof, said guide being oriented so that it will guide the reaming tool along a guiding axis which extends toward the first pin on the first limb; at least two second pins adapted to securely engage the bone, the pins being mounted on the guide, said two second pins extending toward the first limb; means mounting the two second pins for adjustable rotational movement about the guiding axis of the guide to enable the second pins to be adjustably positioned to fit the contour of the bone; means mounting the limbs for movement towards and away from each other and for applying a clamping force to the limbs whereby a bone may be engaged on opposite sides by said first pin and said second pins; and means for preventing the two limbs of said clamp from swivelling relative to each other to cause misalignment of the guide pin of the first limb and the axis of the guide in the second limb.
Claim 9
Dependent Claim
219 words
An orthopaedic tool for guiding a cylindrical reaming tool along a predetermined axis to form a replaceable bone plug from a host bone comprising: a first limb having a first pin at one end thereof, the pin being adapted to securely engage the bone; a second limb having a guide for the reaming tool at one end thereof, said guide being oriented so that it will guide the reaming tool along a guiding axis which extends toward the first pin on the first limb; at least two second pins adapted to securely engage the bone, the pins being mounted on the guide, said two second pins extending toward the first limb; means mounting the two second pins for adjustable rotational movement about the guiding axis of the guide to enable the second pins to be adjustably positioned to fit the contour of the bone; means mounting the limbs for movement towards and away from each other and for applying a clamping force to the limbs whereby a bone may be engaged on opposite sides by said first pin and said second pins; and means for preventing the two limbs of said clamp from swivelling relative to each other to cause misalignment of the guide pin of the first limb and the axis of the guide in the second limb.
Claim 10
Dependent Claim
97 words
8 . A method of securing a prosthetic ligament to a host bone comprising the steps of: removing a cylindrical bone plug from one surface of the host bone to leave a cylindrical socket in the host bone; forming a bore of smaller diameter than the cylindrical socket coaxial with the socket extending from the cylindrical socket to an opposing surface of the host bone; drawing the prosthetic ligament through the cylindrical socket and the bore; replacing the bone plug into the socket thereby to capture the prosthetic ligament between the bone plug and the host bone.
Claim 11
Dependent Claim
97 words
8 . A method of securing a prosthetic ligament to a host bone comprising the steps of: removing a cylindrical bone plug from one surface of the host bone to leave a cylindrical socket in the host bone; forming a bore of smaller diameter than the cylindrical socket coaxial with the socket extending from the cylindrical socket to an opposing surface of the host bone; drawing the prosthetic ligament through the cylindrical socket and the bore; replacing the bone plug into the socket thereby to capture the prosthetic ligament between the bone plug and the host bone.
Claim 12
Independent Claim
401 words
A method of securing a prosthetic ligament to a first and second host bone to extend between a first surface of the first host bone and a second surface of the second host bone comprising the steps of: removing a first cylindrical bone plug from a third surface opposite to the first surface of the first host bone plug, to leave a first cylindrical socket; forming a first bore of smaller diameter than the first socket, coaxial with the first socket and extending from the socket to the first surface of the first host bone; removing a second cylindrical bone plug from a fourth surface opposite to the second surface of the second host bone to leave a second host socket; forming a second bore of smaller diameter than the second socket coaxial with the second socket and extending from the socket to the second surface of the second host bone to form a shoulder between the socket and the bore; providing a prosthetic ligament including at one end a pouch portion capable of receiving a cylindrical bone plug and including an opening through which a bone plug may pass into the pouch portion; passing the prosthetic ligament thorugh the first socket, the first bore, the second bore and the second socket, whereby said pouch portion lies beyond said second socket; inserting the second bore plug through the opening to lie within the pouch portion; preventing the second bone plug from escaping from the pouch opening in a direction towards the fourth surface of the second host bone; pulling the prosthetic ligament in a direction towards the second surface of the second host bone to force the second bone plug against the shoulder between the socket and the bore to secure the prosthetic ligament to the second host bone; replacing the first bone plug into the first socket thereby to capture the prosthetic ligament between the host bone and the first bone plug whereby the ligament is secured to the first and second host bones. 10 . A technique for cutting and removing a replaceable bone plug from a host bone comprising: forming an annular channel in the host bone to define the periphery of the plug; applying a sharp blow to the plug along a direction transverse to the axis of the plug to shear the plug from the host bone; and removing the sheared plug from the host bone.
Claim 13
Independent Claim
401 words
A method of securing a prosthetic ligament to a first and second host bone to extend between a first surface of the first host bone and a second surface of the second host bone comprising the steps of: removing a first cylindrical bone plug from a third surface opposite to the first surface of the first host bone plug, to leave a first cylindrical socket; forming a first bore of smaller diameter than the first socket, coaxial with the first socket and extending from the socket to the first surface of the first host bone; removing a second cylindrical bone plug from a fourth surface opposite to the second surface of the second host bone to leave a second host socket; forming a second bore of smaller diameter than the second socket coaxial with the second socket and extending from the socket to the second surface of the second host bone to form a shoulder between the socket and the bore; providing a prosthetic ligament including at one end a pouch portion capable of receiving a cylindrical bone plug and including an opening through which a bone plug may pass into the pouch portion; passing the prosthetic ligament thorugh the first socket, the first bore, the second bore and the second socket, whereby said pouch portion lies beyond said second socket; inserting the second bore plug through the opening to lie within the pouch portion; preventing the second bone plug from escaping from the pouch opening in a direction towards the fourth surface of the second host bone; pulling the prosthetic ligament in a direction towards the second surface of the second host bone to force the second bone plug against the shoulder between the socket and the bore to secure the prosthetic ligament to the second host bone; replacing the first bone plug into the first socket thereby to capture the prosthetic ligament between the host bone and the first bone plug whereby the ligament is secured to the first and second host bones. 10 . A technique for cutting and removing a replaceable bone plug from a host bone comprising: forming an annular channel in the host bone to define the periphery of the plug; applying a sharp blow to the plug along a direction transverse to the axis of the plug to shear the plug from the host bone; and removing the sheared plug from the host bone.
Claim 14
Dependent Claim
61 words
A technique as defined in claim 10 further comprising; before applying the sharp blow, gripping the plug by an instrument about an arcuate portion of its circumference and fully along its length, said arcuate portion being no greater than about 330°, and applying said sharp blow to the instrument along a direction which is toward the ungripped portion of the plug.
References Cited (Backward Citations)
No citation records indexed.
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