Method and apparatus for augmenting bone
First Claim
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1. An expandable implant assembly for insertion within patient anatomy, the assembly comprising:
- a primary implant elongate along a central axis and configured to expand, within the anatomy, radially outward from the central axis from an insertion configuration to an expanded configuration, the primary implant including an inner surface that defines an internal void; and
an auxiliary implant configured to reside in the internal void and expand radially outward from the central axis from a collapsed configuration to an expanded configuration against the inner surface of the primary implant, the auxiliary implant defining a central body portion and at least first and second nodes each extending outwardly from the central body portion along respective radial directions perpendicular to the central axis, the central axis extending through the central body portion, wherein each of the at least first and second nodes defines;
a neck; and
a foot spaced outwardly from the neck along the respective radial direction, the foot configured to abut the inner surface of the primary implant, the neck extending from the foot to a respective leg of the central body portion, the leg defining a pair of side surfaces, wherein, when the auxiliary implant is in the expanded configuration;
the foot defines a circumferential dimension about the central axis greater than a circumferential dimension of the neck about the central axis, anda circumferential width of the respective leg measured between the respective pair of side surfaces does not decrease along the leg toward the central axis.
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Abstract
An expandable implant system is configured to increase the height of a target bone, for instance that has been subjected to a compression fracture. The expandable implant system includes an implant assembly that can be inserted into the target bone, and subsequently expanded so as to increase the height of the target bone. The expandable implant system further includes an and insertion assembly that is configured to create an insertion channel into the target bone, such that the implant assembly can be inserted in a collapsed configuration into the target bone along the insertion channel, and subsequently expanded.
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Citations
21 Claims
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1. An expandable implant assembly for insertion within patient anatomy, the assembly comprising:
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a primary implant elongate along a central axis and configured to expand, within the anatomy, radially outward from the central axis from an insertion configuration to an expanded configuration, the primary implant including an inner surface that defines an internal void; and an auxiliary implant configured to reside in the internal void and expand radially outward from the central axis from a collapsed configuration to an expanded configuration against the inner surface of the primary implant, the auxiliary implant defining a central body portion and at least first and second nodes each extending outwardly from the central body portion along respective radial directions perpendicular to the central axis, the central axis extending through the central body portion, wherein each of the at least first and second nodes defines; a neck; and a foot spaced outwardly from the neck along the respective radial direction, the foot configured to abut the inner surface of the primary implant, the neck extending from the foot to a respective leg of the central body portion, the leg defining a pair of side surfaces, wherein, when the auxiliary implant is in the expanded configuration; the foot defines a circumferential dimension about the central axis greater than a circumferential dimension of the neck about the central axis, and a circumferential width of the respective leg measured between the respective pair of side surfaces does not decrease along the leg toward the central axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for inserting at least one expandable implant assembly into a target region of patient anatomy, the system comprising:
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a cannulated body configured to advance within the patient anatomy at least to a location adjacent the target region; a primary implant configured to advance through the at least one cannulated body and into the target region, the primary implant being elongate along a central axis and configured to expand radially outward from the central axis, the primary implant including an inner surface that defines an internal void; and an auxiliary implant configured to reside in the internal void and expand radially outward from the central axis and against the inner surface of the primary implant, the auxiliary implant defining a central body portion and at least first and second nodes each extending outwardly from the central body portion along respective radial directions perpendicular to the central axis, the central axis extending through the central body portion, wherein each of the at least first and second nodes defines; a neck; and a foot spaced outwardly from the neck along the respective radial direction, the foot configured to abut the inner surface of the primary implant, the neck extending from the foot to a respective leg of the central body portion, the leg defining a pair of side surfaces, wherein, when the auxiliary implant is in the expanded configuration; the foot defines a circumferential dimension about the central axis greater than a circumferential dimension of the neck about the central axis, and a circumferential width of the respective leg measured between the respective pair of side surfaces does not decrease along the leg toward the central axis. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification