Expandable implant, implant system, kit of parts for assembling an expandable implant, and method of placing an implant in a bone

An expandable implant which is implantable in-vivo in an intra-osseous cavity of a bone, of a human or non-human mammal, the implant comprising:

• an anchoring body having a distal end and a proximal end, in a longitudinal direction from the distal end towards the proximal end at a distance from the distal end, for anchoring the distal end relative to a part of the bone outside the cavity;
• an expandable part to be admitted in the intra-osseous cavity, which expandable part:
• is fixated to the anchoring body,
• has an expanded state and a non-expanded state, and
• comprises a movable piece with a load supporting surface for supporting a wall of the cavity against a load acting on the bone, which movable piece is movable from an initial position in the non-expanded, in a direction of expansion away from the anchoring body and perpendicular to the longitudinal direction, to bring the load supporting surface state to an expanded position in the expanded state in which the load supporting surface abuts to the wall;
• a drive part which is movable relative to the proximal end of the anchoring body;
• and
• a transmission extending between the drive part and the expandable part, the transmission engaging on the load supporting surface for transferring at least a part of a force exerted on the drive part to move the drive part relative to the proximal end of the anchoring body to the load supporting surface and thereby actuate movement of the load supporting surface in the direction of expansion;
• wherein the anchoring body is an elongate body, with a bore, extending from the proximal end to the distal end, and the transmission extends through the bore;
• wherein the movable piece comprises an inward facing side, facing away from, and preferably opposite to the load supporting surface;
• wherein the transmission comprises a mechanical actuator located below the movable piece, which engages with the inward facing side, and a driving part extending through the bore arranged to drive the mechanical actuator;
• wherein the mechanical actuator comprises at least two elements mounted on the driving part at in the longitudinal direction spaced apart positions, and the positions being movable towards each other in the longitudinal direction by a motion of the driving part, the elements when the positions are moved pushing the movable piece in the direction of expansion;
• and
• wherein the elements have a conical shape and are oriented with their axial direction extending in the longitudinal direction, and the bases of the conical shapes facing away from each other.

An expandable implant which is implantable in-vivo in an intra-osseous cavity of a bone, of a human or non-human mammal, the implant comprising:

• an anchoring body having a distal end and a proximal end, in a longitudinal direction from the distal end towards the proximal end at a distance from the distal end, for anchoring the distal end relative to a part of the bone outside the cavity;
• an expandable part to be admitted in the intra-osseous cavity, which expandable part:
• is fixated to the anchoring body,
• has an expanded state and a non-expanded state, and
• comprises a movable piece with a load supporting surface for supporting a wall of the cavity against a load acting on the bone, which movable piece is movable from an initial position in the non-expanded, in a direction of expansion away from the anchoring body and perpendicular to the longitudinal direction, to bring the load supporting surface state to an expanded position in the expanded state in which the load supporting surface abuts to the wall;
• a drive part which is movable relative to the proximal end of the anchoring body;
• and
• a transmission extending between the drive part and the expandable part, the transmission engaging on the load supporting surface for transferring at least a part of a force exerted on the drive part to move the drive part relative to the proximal end of the anchoring body to the load supporting surface and thereby actuate movement of the load supporting surface in the direction of expansion;
• wherein the anchoring body is an elongate body, with a bore, extending from the proximal end to the distal end, and the transmission extends through the bore;
• wherein the movable piece comprises an inward facing side, facing away from, and preferably opposite to the load supporting surface;
• wherein the transmission comprises a mechanical actuator located below the movable piece, which engages with the inward facing side, and a driving part extending through the bore arranged to drive the mechanical actuator;
• wherein the mechanical actuator comprises at least two elements mounted on the driving part at in the longitudinal direction spaced apart positions, and the positions being movable towards each other in the longitudinal direction by a motion of the driving part, the elements when the positions are moved pushing the movable piece in the direction of expansion;
• and
• wherein the elements have an inclined plane, inclined relative to the longitudinal direction, the inclined plane contacting the inwards facing side and oriented to slide over the inwards facing side to push the movable piece when the positions are moved towards each other.

An expandable implant which is implantable in-vivo in an intra-osseous cavity of a bone, of a human or non-human mammal, the implant comprising:

• an anchoring body having a distal end and a proximal end, in a longitudinal direction from the distal end towards the proximal end at a distance from the distal end, for anchoring the distal end relative to a part of the bone outside the cavity;
• an expandable part to be admitted in the intra-osseous cavity, which expandable part:
• is fixated to the anchoring body, has an expanded state and a non-expanded state, and comprises a movable piece with a load supporting surface for supporting a wall of the cavity against a load acting on the bone, which movable piece is movable from an initial position in the non-expanded, in a direction of expansion away from the anchoring body and perpendicular to the longitudinal direction, to bring the load supporting surface state to an expanded position in the expanded state in which the load supporting surface abuts to the wall;
• a drive part which is movable relative to the proximal end of the anchoring body;
• and
• a transmission extending between the drive part and the expandable part, the transmission engaging on the load supporting surface for transferring at least a part of a force exerted on the drive part to move the drive part relative to the proximal end of the anchoring body to the load supporting surface and thereby actuate movement of the load supporting surface in the direction of expansion;
• wherein the expandable part is at least partially admitted in a space in the anchoring body located at the distal end, the space having an opening to allow the movable piece to move outwards in the direction of expansion, in which:
• the distal end is shaped as a slotted tube;
• the space is formed by a slot of the slotted tube in which the expandable part is located, the slot having an opening extending parallel to the longitudinal direction;
• and the movable piece is in the initial position at least partly recessed in the slot and movable through the opening to the expanded position;
• and
• a mechanical actuator comprises at least two elements mounted on the driving part at spaced apart positions in the longitudinal direction, and the positions being movable towards each other in the longitudinal direction by a motion of the driving part, the elements pushing the movable piece in the direction of expansion when the positions are moved;
• and
• of which the at least two elements comprise a stationary element at one of a proximal end side or a distal end side of the space and is an element of which the position is stationary, and at least one other elements is formed by a separate piece located in the space, the separate piece being movable in the space in the longitudinal direction.

An expandable implant which is implantable in-vivo in an intra-osseous cavity of a bone, of a human or non-human mammal, the implant comprising:

• an anchoring body having a distal end and a proximal end, in a longitudinal direction from the distal end towards the proximal end at a distance from the distal end, for anchoring the distal end relative to a part of the bone outside the cavity, wherein the anchoring body is an elongate body, with a bore, extending from the proximal end to the distal end, and a transmission extends through the bore;
• an expandable part to be admitted in the intra-osseous cavity, which expandable part:
• is fixated to the anchoring body, has an expanded state and a non-expanded state, and comprises a movable piece with a load supporting surface for supporting a wall of the cavity against a load acting on the bone, which movable piece is movable from an initial position in the non-expanded, in a direction of expansion away from the anchoring body and perpendicular to the longitudinal direction, to bring the load supporting surface state to an expanded position in the expanded state in which the load supporting surface abuts to the wall;
• a drive part which is movable relative to the proximal end of the anchoring body;
• and
• a transmission extending between the drive part and the expandable part, the transmission engaging on the load supporting surface for transferring at least a part of a force exerted on the drive part to move the drive part relative to the proximal end of the anchoring body to the load supporting surface and thereby actuate movement of the load supporting surface in the direction of expansion;
• and
• wherein the expandable part is at least partially admitted in a space in the anchoring body located at the distal end, the space having an opening to allow the movable piece to move outwards in the direction of expansion, in which:
• the distal end is shaped as a slotted tube;
• the space is formed by a slot of the slotted tube in which the expandable part is located, the slot having an opening extending parallel to the longitudinal direction;
• and
• the movable piece is in the initial position at least partly recessed in the slot and movable through the opening to the expanded position, wherein the movable piece comprises an inward facing side, facing away from, and preferably opposite to the load supporting surface, and
• the transmission comprises:
• a mechanical actuator located below the movable piece, which engages with the inward facing side, and
• a driving part extending through the bore arranged to drive the mechanical actuator, wherein the mechanical actuator comprises at least two elements mounted on the driving part at in the longitudinal direction spaced apart positions, and the positions being movable towards each other in the longitudinal direction by a motion of the driving part, the elements when the positions are moved pushing the movable piece in the direction of expansion.