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US 12,178,485 B1Granted
Cannulated continuous compression screw
AssigneeUniversity of Utah Research Foundation
InventorsColin S. Gregersen, T. Wade Fallin, Charles L. Saltzman, Chase Hagman
Life of this patent
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Abstract
A bone screw may be insertable into a bone. The bone screw may have a distal member with bone-engaging threads, a proximal member configured to slidably engage the distal member, and a tension member with a proximal end coupled to the proximal member, and a distal end coupled to the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member.
Claims34
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising bone-engaging threads and a driver engagement feature;
- a proximal member comprising a proximal opening through which a driver is insertable to engage the driver engagement feature, and configured to slidably and rotatably engage the distal member;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member.
4 more elements
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising bone-engaging threads;
- a proximal member configured to slidably and rotatably engage the distal member to cause the bone screw to have a minimum length and a maximum length that is greater than the minimum length;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to a distal end of the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member;
- wherein:
- the proximal member comprises a proximal shaft with a proximal shaft width;
- the distal member comprises a distal shaft with a distal shaft width;
- and
- at each of the minimum length and the maximum length, the proximal shaft width is greater than the distal shaft width.
9 more elements
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising bone-engaging threads;
- a proximal member comprising a head, wherein the proximal member is configured to slidably engage the distal member to cause the bone screw to have a minimum length and a maximum length that is greater than the minimum length;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to a distal end of the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member;
- wherein:
- the proximal member comprises a proximal shaft with a proximal shaft width;
- the distal member comprises a distal shaft with a distal shaft width;
- and
- at each of the minimum length and the maximum length, the proximal shaft and the distal shaft both have circular cross-sectional shapes from a portion of the proximal shaft adjacent the head to a portion of the distal shaft adjacent the bone-engaging threads.
9 more elements
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising:
- bone-engaging threads;
- and
- a driver engagement feature;
- a proximal member configured to slidably engage the distal member such that the driver engagement feature is accessible while the proximal member and the distal member are engaged;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to the distal member such that, in response to motion of the
- distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member;
- wherein, with the distal member, the proximal member, and the tension member fully assembled, the driver engagement feature is configured to mate with a driver to receive torque directly from the driver to insert the screw into the bone and to remove the screw from the bone.
9 more elements
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising bone-engaging threads;
- a proximal member configured to slidably engage the distal member to cause the bone screw to have a minimum length and a maximum length that is greater than the minimum length;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to a distal end of the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member;
- wherein:
- the proximal member comprises a proximal shaft with a proximal shaft width;
- the distal member comprises a distal shaft with a distal shaft width;
- at each of the minimum length and the maximum length, the proximal shaft width is greater than the distal shaft width;
- and
- the proximal member comprises a distalmost rim that, at the minimum length, does not abut the distal member.
10 more elements
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising:
- bone-engaging threads;
- and
- a driver engagement feature configured to mate with a driver to receive torque directly from the driver;
- a proximal member configured to slidably engage the distal member such that the driver engagement feature is accessible while the proximal member and the distal member are engaged;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member;
- wherein the proximal member comprises a proximal opening through which the driver is insertable to engage the driver engagement feature.
8 more elements
A bone screw insertable into a bone, the bone screw comprising:
- a distal member comprising bone-engaging threads and a driver engagement feature;
- a proximal member configured to slidably and rotatably engage the distal member;
- and
- a tension member comprising:
- a proximal end configured to be coupled to the proximal member;
- and
- a distal end configured to be coupled to the distal member such that, in response to motion of the distal member away from the proximal member, the tension member elongates and urges the distal member to move toward the proximal member;
- wherein, with the distal member, the proximal member, and the tension member fully assembled, the driver engagement feature is configured to mate with a driver to receive torque directly from the driver when the bone screw is fully implanted within the bone.
5 more elements
Dependencies are inferred from the claim text.