Apparatus and methods for securing a bone implant

A hub for an expandable bone implant, the implant having a central axis member and a support member, the support member having a first end and a second end that are spaced apart from each other along the central axis member, the support member having a mid-section that is configured to deflect radially away from the central axis member when the implant expands, the hub comprising a support member terminal that is configured to:

• fix the second end longitudinally relative to the central axis member during expansion of the implant;
• and
• fix the second end radially relative to the central axis member during the expansion;
• wherein the support member terminal includes a clearance notch for the support member so that the second end has an angular range of motion during the expansion.

A stabilizer for an implant for a bone, the bone having an access hole for delivery of the implant, the access hole having a hole wall, the stabilizer comprising an elongated member that is configured to extend:

• along the hole;
• and
• between the implant, when the implant is deployed in the bone, and an anchor receiving feature;
• wherein the anchor receiving feature is configured to receive an anchor driven into the hole wall.

A stabilizer for an implant for a bone, the implant being configured to be deployed through an access hole in a cortical wall of the bone, the stabilizer comprising:

• a site for an anchor receiving feature that is configured to receive an anchor driven into an outer surface of the cortical wall;
• an elongated member that is configured to extend between the implant, when the implant is deployed in the bone, and the site;
• and
• a buttress plate positioned over the elongated member and configured to resist:
• rotation of the elongated member about a central axis of the access hole;
• and
• axial movement of the elongated member transverse to the elongated member.

A stabilizer for an implant for a bone, the implant being configured to be deployed through an access hole in a cortical wall of the bone, the stabilizer comprising:

• an elongated member that is configured to extend:
• along the hole;
• and
• between the implant, when the implant is deployed in the bone, and a buttress collar;
• wherein:
• the buttress collar is supported at an opening of the access hole;
• the elongated member terminates at the buttress collar;
• and
• the buttress collar is substantially parallel to an outside surface of the cortical wall.

An apparatus comprising:

• a bracket that is configured to receive a bone anchor;
• an extension member that is configured to support the bracket relative to a bone implant that is deployed inside the bone;
• and
• a fastening assembly that is configured to fasten:
• the bracket to the extension;
• and
• the extension to the implant;
• wherein the fastening assembly has:
• a first state in which the bracket is movable relative to the implant;
• and
• a second state in which the bracket is locked relative to the implant.

A bone implant comprising:

• a central axis member;
• a first expandable web that is supported coaxially about the central axis member;
• and
• a second expandable web that is supported coaxially about the central axis member and within the first expandable web.

An implant for a bone, the implant comprising a structural component and having an expanded state, a collapsed state, a longitudinal axis and a transverse axis perpendicular to the longitudinal axis, the structural component comprising, along the longitudinal axis:

• a first zone;
• a second zone;
• and
• a third zone;
• wherein:
• the first zone has a first resistance to bending about the transverse axis;
• the second zone and the third zone have a second resistance to bending about the transverse axis;
• and
• in the collapsed state, the first resistance to bending is greater than the second resistance to bending.

An implant for a bone, the implant comprising a structural component and the implant having an expanded state, a collapsed state and a longitudinal axis, the structural component comprising:

• a first structural member extending along the longitudinal axis;
• a second structural member extending along the longitudinal axis and spaced circumferentially about the longitudinal axis from the first member;
• and
• a cross support that spans from the first member to the second member, the cross support comprising a member having a joint, the member configured to be:
• folded about the joint in the collapsed state;
• and
• unfolded about the joint in the expanded state.

An implant for a bone, the implant comprising a support component, the support component defining a plane, the implant having a longitudinal axis that lies in the plane, a first transverse axis that lies in the plane and is perpendicular to the longitudinal axis and a second transverse axis that is perpendicular to the longitudinal axis and perpendicular to the plane;

• wherein the support component has:
• a first resistance to bending about the longitudinal axis or about the first transverse axis;
• a second resistance to bending about the second transverse axis;
• and
• the first bending resistance is greater than the second bending resistance.

A bone implant comprising:

• a central axis member that defines a longitudinal axis;
• and
• an expandable web that is supported coaxially about the central axis member, the expandable web comprising:
• a first mesh cell density that varies longitudinally along a first segment of the expandable web;
• a second mesh cell density that varies longitudinally along a second segment of the expandable web;
• a third mesh cell density along a third segment of the expandable web;
• a fourth mesh cell density that varies longitudinally along a fourth segment of the expandable web;
• a fifth mesh cell density that varies longitudinally along a fifth segment of the expandable web;
• such that when the expandable web is in an expanded state:
• the first segment has a first profile;
• the second segment has a second profile;
• the third segment has a third profile;
• the fourth segment has a fourth profile;
• and
• the fifth segment has a fifth profile.

A bone implant comprising:

• a central axis member that defines a longitudinal axis;
• and
• an expandable web that is supported coaxially about the central axis member, the expandable web including:
• a first mesh cell density that varies longitudinally along a first segment of the expandable web;
• a second mesh cell density that varies longitudinally along a second segment of the expandable web;
• and
• a third mesh cell density that varies longitudinally along a third segment of the expandable web;
• such that when the expandable web is in an expanded state:
• the first segment has a first profile;
• the second segment has a second profile;
• and
• the third segment has a third profile.

A bone implant comprising:

• a central axis member that defines a longitudinal axis;
• and
• an expandable web that is supported coaxially about the central axis member, the expandable web comprising:
• a first mesh cell density that varies longitudinally along a first segment of the expandable web;
• a second mesh cell density that varies longitudinally along a second segment of the expandable web;
• and
• a third mesh cell density along a third segment of the expandable web;
• such that when the expandable web is in an expanded state:
• the first segment has a first profile;
• the second segment has a second profile;
• and
• the third segment has a third profile.

A bone implant comprising:

• a central axis member that defines a longitudinal axis and a radial direction normal to the axis;
• and
• an expandable web that is supported about the central axis member, the expandable web having a transverse profile;
• wherein a radial distance from the central axis member to the profile varies circumferentially about the axis.