Expandable Endoprosthesis
First Claim
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1. An implantable device comprising:
- a first implant component implantable into a first bone portion;
a second implant component implantable to a second bone portion, the second implant component telescopically coupled to the first component; and
a third implant component comprising a shape-memory polymer, the third implant component held between the first and second components, the third implant component passively expanding from a first dimension to a second dimension during a selected time interval after implantation.
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Abstract
An implantable device includes a first implant component implantable into a first bone portion, a second implant component implantable to a second bone portion and a third implant component comprising a shape-memory polymer. The second implant component is telescopically coupled to the first component. The third implant component is held between the first and second components. The third implant component passively expands from a first dimension to a second dimension during a selected time interval after implantation.
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Citations
21 Claims
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1. An implantable device comprising:
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a first implant component implantable into a first bone portion; a second implant component implantable to a second bone portion, the second implant component telescopically coupled to the first component; and a third implant component comprising a shape-memory polymer, the third implant component held between the first and second components, the third implant component passively expanding from a first dimension to a second dimension during a selected time interval after implantation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable device comprising:
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first and second implant components implantable into bone, the first and second implant components coupled for telescopic movement relative to one another along a longitudinal axis of the implantable device; a third implant component positioned between the first and second components along the longitudinal axis, the third implant component having a first length before implantation at a first time, the third implant component expanding after implantation along the longitudinal axis to a second length greater than the first length at a second time different that the first time, such that the implantable device expands by an amount equal to the difference between the first and second lengths. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for expanding an implantable device, the method comprising:
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implanting first and second implant components into bone; telescopically coupling the first and second implant components along a longitudinal axis; providing a third implant component comprising a shape memory polymer having a first length before implantation; positioning the third implant component between the first and second implant components along the longitudinal axis, wherein the third implant component passively expands after implantation to a second length over a selected recovery time; and passively expanding the implantable device by an amount equal to the difference between the second and first lengths by a corresponding expansion of the third implant component. - View Dependent Claims (18, 19, 20, 21)
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Specification