Humeral head fixation device for osteoporotic bone
A device includes an elongated body configured to be coupled to a bone stabilization implant so that, when the bone stabilization implant is mounted to a target bone, the body extends away from the bone stabilization implant at an angle selected so that the elongated body passes into a target portion of bone. The body defines a lumen therein extending to an opening in a distal end of the body. The device also includes a deploying member housed within the lumen of body for movement between a first position and a second position. In addition, the device includes a plurality of wires coupled to the deploying member so that movement of the deploying member through the lumen moves the wires between an insertion position and a deployed position in which the distal ends of the wires penetrate a portion of bone adjacent to the distal end of the body.
1. A method for treating a bone, comprising:
inserting a device to a desired position within a head portion of a target bone, the device including an elongated body having a lumen extending therethrough and a deploying member movably received within the lumen, the deploying member being coupled to a plurality of wires which, in an insertion configuration, are received within the lumen;
moving the deploying member relative to the lumen to drive the wires distally out of the lumen so that the wires penetrate a portion of bone adjacent to a distal end of the elongated body to anchor the device to the target bone; and
coupling the device to a bone stabilization implant coupled to an exterior of the target bone,
wherein the wires are coupled to the deploying member via protrusions at proximal ends thereof.
2. The method of claim 1 , wherein inserting the device to the desired position includes rotating the device about a longitudinal axis thereof.
3. The method of claim 2 , wherein the device is a screw coupled to the bone stabilization implant via a threading about a head portion of the screw.
4. The method of claim 1 , wherein the wires are moved distally out of the lumen along a curved path.
5. A method for treating a bone, comprising:
inserting a device to a desired position within a head portion of a target bone, the device including an elongated body having a lumen extending therethrough and a deploying member movably received within the lumen, the deploying member being coupled to a plurality of wires which, in an insertion configuration, are received within the lumen;
moving the deploying member relative to the lumen to drive the wires distally out of the lumen so that the wires penetrate a portion of bone adjacent to a distal end of the elongated body to anchor the device to the target bone, the deploying member extending distally out of the lumen; and
coupling the device to a bone stabilization implant coupled to an exterior of the target bone,
wherein first and second ones of the wires are biased toward an anchoring shape in which distal portions thereof curve radially outward relative to a longitudinal axis of the elongated body, and
wherein, when in the anchoring shape, the wires curve through an angle between 90 and 180 degrees.
6. A method for treating a bone, comprising:
inserting a device to a desired position within a head portion of a target bone, the device including an elongated body having a lumen extending therethrough and a deploying member movably received within the lumen, the deploying member being coupled to a plurality of wires which, in an insertion configuration, are received within the lumen;
moving the deploying member relative to the lumen to drive the wires distally out of the lumen so that the wires penetrate a portion of bone adjacent to a distal end of the elongated body to anchor the device to the target bone, the deploying member extending distally out of the lumen; and
coupling the device to a bone stabilization implant coupled to an exterior of the target bone,
wherein the deploying member is a bolt threadedly engaging an inner surface of the longitudinal body defining the lumen, rotation of the bolt in a first direction relative to a longitudinal axis of the longitudinal body, moving the bolt longitudinally through the lumen.
7. The method of claim 6 , further comprising removing the device from the target bone by rotating the bolt in a second direction relative to a longitudinal axis of the elongated body so that the wires are retracted into the lumen of the elongated body.
8. The method of claim 1 , wherein the bone stabilization implant is one of a bone plate, a nail and an anchoring element.