Expandable orthopedic device
First Claim
Patent Images
1. A vertebral expandable implant, comprising:
- at least one bearing surface which expands away from a central longitudinal axis of the implant;
a first implant end and an opposed second implant end, wherein at least one of the first implant end and the opposed second implant end includes an opening or retaining recess, and wherein the first implant end and the opposed second implant end are intended to move toward one another during expansion of the implant;
a retaining member comprising an elongate structure having a first retaining member end and a second retaining member end, wherein at least one of the first retaining member end and the second retaining member end is configured to engage with a respective opening or retaining recess of the first implant end and the opposed second implant end, and wherein at least one retaining member end comprises a plurality of ridges of varying widths and corresponding plurality of grooves therebetween; and
at least one retaining member engagement element provided within the opening or retaining recess of the at least one of the first implant end and the opposed second implant end, wherein the at least one retaining member engagement element is configured to engage a single groove of the plurality of grooves at a time;
whereinthe opening or retaining recess of the at least one of the first implant end and the opposed second implant end comprises;
a first opening or retaining recess end having sufficient depth to allow passage of the engagement element when the engagement element is positioned on a ridge of the plurality of ridges, anda second opening or retaining recess end lacking sufficient depth to allow passage of the engagement element when the engagement element is positioned on a ridge of the plurality of ridges; and
the retaining member is configured for retaining the expandable implant in an expanded configuration by substantially preventing contraction of the expandable implant when expanded.
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Abstract
Methods and apparatuses for restoration of human or animal bone anatomy, which may include introduction, into a bone of an expansible implant capable of expansion in a single determined plane, positioning the expansible implant in the bone in order to correspond the single determined plane with a bone restoration plane and opening out the expansible implant in the bone restoration plane. A first support surface and a second support surface spread tissues within bone. The embodiments of the disclosure may also include injecting a filling material around the implant.
143 Citations
29 Claims
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1. A vertebral expandable implant, comprising:
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at least one bearing surface which expands away from a central longitudinal axis of the implant; a first implant end and an opposed second implant end, wherein at least one of the first implant end and the opposed second implant end includes an opening or retaining recess, and wherein the first implant end and the opposed second implant end are intended to move toward one another during expansion of the implant; a retaining member comprising an elongate structure having a first retaining member end and a second retaining member end, wherein at least one of the first retaining member end and the second retaining member end is configured to engage with a respective opening or retaining recess of the first implant end and the opposed second implant end, and wherein at least one retaining member end comprises a plurality of ridges of varying widths and corresponding plurality of grooves therebetween; and at least one retaining member engagement element provided within the opening or retaining recess of the at least one of the first implant end and the opposed second implant end, wherein the at least one retaining member engagement element is configured to engage a single groove of the plurality of grooves at a time;
whereinthe opening or retaining recess of the at least one of the first implant end and the opposed second implant end comprises; a first opening or retaining recess end having sufficient depth to allow passage of the engagement element when the engagement element is positioned on a ridge of the plurality of ridges, and a second opening or retaining recess end lacking sufficient depth to allow passage of the engagement element when the engagement element is positioned on a ridge of the plurality of ridges; and the retaining member is configured for retaining the expandable implant in an expanded configuration by substantially preventing contraction of the expandable implant when expanded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for retaining an expandable implant in an expanded condition, the said method comprising:
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introducing into a bone an expansible implant, said implant comprising; at least one bearing surface which expands away from a central longitudinal axis of the implant, and a first implant end and an opposed second implant end, wherein the first implant end and the opposed second implant end are intended to move toward one another during expansion of the implant, and wherein at least one of the first implant end and the opposed second implant end includes an opening or retaining recess, said opening or retaining recess housing at least one engagement element; expanding the implant such that the implant engages a mechanical resistance configured to prevent a compression of the implant, wherein; said mechanical resistance is placed between the first implant end and the opposed second implant end, and said mechanical resistance includes a retaining member comprising an elongate structure having a first retaining member end and a second retaining member end, wherein at least one of the first retaining member end and the second retaining member end comprises a plurality of ridges of varying widths and corresponding plurality of grooves therebetween, and wherein the at least one of the first retaining member end and the second retaining member end is configured to engage a respective opening or retaining recess of the first implant end and the opposed second implant end; and positioning the retaining member such that the at least one engagement element engages a single groove of the plurality of grooves at a time; wherein the opening or retaining recess is configured to permit passage of the at least one engagement element over the plurality of ridges during expansion on the implant, and wherein the opening or retaining recess is configured to block passage of the at least one engagement element over a ridge of the plurality of ridges upon application of a compression force to the implant, thereby retaining the at least one engagement element in a groove of the plurality of grooves, and thereby retaining the implant in an expanded configuration by substantially preventing contraction of the implant when expanded. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification