Movable disc implant
First Claim
Patent Images
1. An artificial disc implant for a human spine, comprising:
- two engaging plates, wherein each engaging plate comprises;
a recess; and
two or more slots configured to engage an insertion instrument during insertion of the disc implant, wherein the slots are at an angle relative to an anterior-posterior axis of the engaging plates; and
one or more members positionable between the engaging plates, wherein at least one of the members comprises a portion configured to complement at least one of the recesses to allow axial rotation, lateral movement and anteroposterior movement of the engaging plates relative to each other during use.
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Accused Products
Abstract
A disc implant is provided which maintains intervertebral spacing and stability within the spine. In an embodiment, a disc implant may include three or more components. Components of the implant may imitate certain physiological movements associated with a healthy spine. In certain embodiments, the components of the implant may limit physiological movements to within certain ranges, imitating normal spinal movements.
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Citations
45 Claims
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1. An artificial disc implant for a human spine, comprising:
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two engaging plates, wherein each engaging plate comprises;
a recess; and
two or more slots configured to engage an insertion instrument during insertion of the disc implant, wherein the slots are at an angle relative to an anterior-posterior axis of the engaging plates; and
one or more members positionable between the engaging plates, wherein at least one of the members comprises a portion configured to complement at least one of the recesses to allow axial rotation, lateral movement and anteroposterior movement of the engaging plates relative to each other during use. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for inserting an artificial disc implant between human vertebrae, comprising:
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an inserter having a body, a passage through the body, and arms, wherein the arms are configured to be releasably coupled to engaging plates of the artificial disc implant; and
a distractor positionable in the passage in the body, wherein the distractor is configured to separate the arms of the inserter such that engaging plates coupled to the arms of the inserter remain substantially parallel during separation of the engaging plates to form a disc space between the human vertebrae. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for forming an artificial disc implant between human vertebrae, comprising:
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positioning two engaging plates between the human vertebrae;
separating the engaging plates such that the engaging plates remain substantially parallel;
positioning one or more members between the engaging plates such that a surface of at least one of the members contacts a complementary surface of at least one of the engaging plates; and
wherein the engaging plates and at least one of the members are configured to allow relative movement of the engaging plates during use. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A disc implant, comprising:
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a first engaging plate and a second engaging plate;
a member positionable between the engaging plates;
wherein the first engaging plate comprises a recess configured to receive a base of the member, wherein one or more sides of the recess are tapered; and
wherein a surface of the second engaging plate complements a surface of the member to allow axial rotation, lateral movement and anteroposterior movement of the engaging plates relative to each other during use. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A system for inserting an artificial disc implant, comprising:
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an inserter having a body, a passage through the body and arms, wherein the arms are configured to be releasably coupled to engaging plates of the artificial disc implant; and
one or more distractors positionable through the passage in the body, the distractors configured to move the arms to establish a separation distance between engaging plates coupled to the arms. - View Dependent Claims (29, 30, 31)
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32. An instrument kit, comprising:
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one or more trial endplates;
a plurality of implant components; and
an inserter configured to couple to selected implant components to allow the components to be positioned in a disc space;
one or more distractors configured to couple to the inserter to establish a separation distance between the selected implant components coupled to the inserter. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A method for forming an implant between vertebrae of a spine, comprising:
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coupling a pair of engaging plates to a portion of an inserter;
positioning the engaging plates between adjacent vertebrae;
positioning one or more members between the engaging plates; and
wherein at least a portion of the engaging plates and at least a portion of at least one member is configured to allow at least some movement of a first vertebra relative to a second vertebra. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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45. An instrument for insertion of a disc implant, comprising:
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a body;
one or more arms configured to couple to one or more engaging plates;
a distractor positionable in an opening of the body, wherein the distractor is configured to separate in a substantially parallel direction one engaging plate from a second engaging plate.
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Specification