Ligament fixation device and method
First Claim
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1. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
- a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring; and
an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring, the device including a relatively narrow strut which extends from the ring proximally to a securing member attached to its proximal end, the securing member constructed and arranged to engage an exterior surface of the bone and to secure the ring in the cortical region of the bone passage at a position spaced distally from the exterior surface of the bone.
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Abstract
The invention relates to a device for attaching a ligament graft to the inside of a bone passage from a proximal location, the device including (1) a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized to fit within the bone passage; (2) a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring; and (3) an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring.
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Citations
25 Claims
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1. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring; and
an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring, the device including a relatively narrow strut which extends from the ring proximally to a securing member attached to its proximal end, the securing member constructed and arranged to engage an exterior surface of the bone and to secure the ring in the cortical region of the bone passage at a position spaced distally from the exterior surface of the bone. - View Dependent Claims (2)
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3. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring; and
an expander coupled to the expansible gripping member constructed to expand the expansible gripping member to grip the ligament against the ring, and wherein the ring includes at least one aperture disposed to permit in-growth of bone about the ligament graft.
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4. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring; and
an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring, further comprising;
at least one strut extending distally from the ring; and
a distal member disposed at the distal end of the strut in position to limit distal movement of the gripping member. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring;
an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring, the expansible gripping member comprising a set of circumferentially arranged proximally extending leg portions constructed and arranged to be splayed apart by wedging action of a centrally introduced member and in which the exterior surface of the leg portions have ligament gripping projections, and in which the ring supports a threaded rod that extends through the gripping member, in combination with a threaded expander wedge constructed and arranged to be threaded on the threaded rod into the expansible gripping member in a wedging relationship.
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11. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring;
an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring, the expansible gripping member comprising a set of circumferentially arranged proximally extending leg portions constructed and arranged to be splayed apart by wedging action of a centrally introduced member and in which the exterior surface of the leg portions have ligament gripping projections, and in which the expansible gripping member supports a threaded rod extending proximally from the gripping member in combination with a threaded expander wedge constructed and arranged to be threaded on the threaded rod into the expansible gripping member in a wedging relationship.
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12. A device for attaching a ligament graft to the inside of a predetermined bone tunnel from its proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone tunnel;
a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring;
an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring, and in which the expansible member supports a threaded rod extending proximally from the gripping member in combination with a threaded wedge element constructed and arranged to be threaded on the threaded rod into the expansible gripping member in a wedging relationship. - View Dependent Claims (13)
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14. A device for attaching a ligament graft to the inside of a bone tunnel from a proximal aspect, the device comprising:
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a non-expansible ledge structure providing an interior passage through which the ligament graft may extend, the structure sized and adapted to fit within and be secured in the bone tunnel;
a gripping member sized to be opposed to the ledge structure and to grip the ligament against a portion of the ledge structure; and
at least one strut extending distally from the portion of the ledge structure against which the ligament is gripped, a distal member disposed at the distal end of the strut in position to limit distal movement of the gripping member. - View Dependent Claims (15, 16)
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17. A device for attaching a ligament graft to the inside of a bone tunnel from an extra-articular location, the device comprising:
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a rigid ring having an interior passage through which the ligament graft may extend, the ring sized to fit within the bone tunnel;
a gripping member constructed and arranged to grip a ligament graft against the interior surface of the rigid ring; and
at least one relatively narrow strut extending proximally from the ring, a securing member attached to the proximal end of the strut, the securing member sized to engage an exterior surface of the bone to secure the ring in the cortical region of the bone tunnel at a position spaced distally from the exterior surface of the bone. - View Dependent Claims (18, 19, 20, 21, 22)
an expander is coupled to the expandable gripping member, constructed to expand the gripping member to grip the ligament against the ring.
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21. The device of claim 20 in which the gripping member, when in position within the ring, has a distal portion extending beyond the ring that positions a corresponding portion of the ligament near or at the surface of the bone passage in the path of in-growing bone.
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22. The device of claim 17 in which the gripping member is expansible to grip the ligament against the ring.
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23. A device for attaching a ligament graft to the inside of a bone tunnel from an extra-articular location, the device comprising:
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a rigid ring having an interior passage through which the ligament graft may extend, the ring sized to fit within the bone tunnel;
a gripping member constructed and arranged to grip a ligament graft against the interior surface of the rigid ring;
at least one strut extending proximally from the ring, a securing member attached to the proximal end of the strut, the securing member sized to engage an exterior surface of the bone to secure the ring in the cortical region of the bone tunnel, and in which a bone-penetrating formation is carried by the securing member.
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24. A device for attaching a ligament graft to the inside of a bone tunnel from an extra-articular location, the device comprising:
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a rigid ring having an interior passage through which the ligament graft may extend, the ring sized to fit within the bone tunnel;
a gripping member constructed and arranged to grip a ligament graft against the interior surface of the rigid ring;
at least one strut extending proximally from the ring, a securing member attached to the proximal end of the strut, the securing member sized to engage an exterior surface of the bone to secure the ring in the cortical region of the bone tunnel, and in which the securing member is a flange having a hole sized to receive an awl-like tool to hold the member in position against rotation while a portion of the device is turned during the procedure.
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25. A device for attaching a ligament graft to the inside of a bone tunnel from a proximal aspect, the device comprising:
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a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized and adapted to fit within and be secured in the bone passage;
strut portions extending proximally and distally from the ring;
a securing member attached to the end of the proximally-extending strut portion, the securing member sized to engage an exterior surface of the bone to secure the ring in the cortical region of the bone tunnel;
a base member attached to the distal end of the distally extending strut portion;
a threaded rod extending proximally from the base member through the ring;
and a gripping member disposed between the rod and the ring, the gripping member constructed to grip the ligament against the ring.
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Specification