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US 12,708,418 B2Granted
Orthopedic bone screw
AssigneeBioMedtrix, LLC
InventorsChristopher G. Sidebotham, Gregory T. Van Der Meulen
Life of this patent
Estimating the term…
Abstract
An orthopedic bone screw includes a head, and a shaft extending from the head and comprising threads. The threads have a major diameter and a minor diameter. The shaft includes a threadless atraumatic tip opposite the head, the threadless atraumatic tip having a cylindrical portion that is distal of the threads and a round end portion that is distal of the cylindrical portion and forms a tip of the orthopedic bone screw. A length of the cylindrical portion of the atraumatic tip is 25% to 150% of the major diameter of the threads.
Claims22
An orthopedic bone screw, comprising:
- a head;
- and
- a shaft extending from the head and comprising threads, the threads comprising a major diameter and a minor diameter;
- the shaft comprising a threadless atraumatic tip opposite the head, the threadless atraumatic tip comprising a cylindrical portion that is distal of the threads, and a round end portion that is distal of the cylindrical portion and forms a tip of the orthopedic bone screw;
- the shaft further comprising a thread runout region proximal of the threadless atraumatic tip in which a thread height of the threads gradually increases moving in a proximal direction from the threadless atraumatic tip;
- wherein a length of the cylindrical portion of the threadless atraumatic tip is 25% to 150% of the major diameter of the threads, and the major diameter of the threads is measured proximally of the thread runout region;
- wherein the threads comprise a thread pitch, and the length of the cylindrical portion of the threadless atraumatic tip is 100% to 500% of the thread pitch;
- and
- wherein a diameter of the cylindrical portion of the threadless atraumatic tip is 90% to 100% of the minor diameter of the threads.
6 more elements
An orthopedic bone screw, comprising:
- a head;
- and
- a shaft extending from the head and comprising threads, the threads comprising a major diameter and a minor diameter;
- the shaft comprising a threadless atraumatic tip opposite the head, the threadless atraumatic tip comprising a cylindrical portion that is distal of the threads, and a round end portion that is distal of the cylindrical portion and forms a tip of the orthopedic bone screw;
- wherein at least the cylindrical portion of the threadless atraumatic tip comprises a plurality of cutting flutes;
- wherein the threads comprise a thread pitch, and a length of the cylindrical portion of the threadless atraumatic tip is 100% to 500% of the thread pitch;
- and
- wherein a diameter of the cylindrical portion of the threadless atraumatic tip is 90% to 100% of the minor diameter of the threads.
5 more elements
An orthopedic bone screw, comprising:
- a head;
- a shaft extending from the head, the shaft comprising threads, the threads comprising a major diameter;
- the shaft comprising a threadless atraumatic tip opposite the head, the threadless atraumatic tip comprising a cylindrical portion and a round end portion distal of the cylindrical portion;
- the shaft further comprising a thread runout region proximal of the threadless atraumatic tip in which a thread height of the threads gradually increases moving in a proximal direction from the threadless atraumatic tip;
- wherein the threadless atraumatic tip has a length that is 50% to 100% of a diameter of the cylindrical portion of the threadless atraumatic tip;
- wherein a length of the cylindrical portion of the threadless atraumatic tip is 25% to 150% of the major diameter of the threads, and the major diameter of the threads is measured proximally of the thread runout region;
- and
- wherein the threads comprise a thread pitch, and the length of the cylindrical portion of the threadless atraumatic tip is 100% to 500% of the thread pitch.
5 more elements
An orthopedic bone screw, comprising:
- a head;
- and
- a shaft extending from the head and comprising threads, the threads comprising a major diameter and a minor diameter;
- the shaft comprising a threadless atraumatic tip opposite the head, the threadless atraumatic tip comprising a cylindrical portion that is distal of the threads, and a round end portion that is distal of the cylindrical portion and forms a tip of the orthopedic bone screw;
- the shaft further comprising a thread runout region proximal of the threadless atraumatic tip in which a thread height of the threads gradually increases moving in a proximal direction from the threadless atraumatic tip;
- wherein a length of the cylindrical portion of the threadless atraumatic tip is 25% to 150% of the major diameter of the threads, a diameter of the cylindrical portion of the threadless atraumatic tip is less than the minor diameter of the threads, and the minor diameter of the threads increases in the thread runout region from the diameter of the cylindrical portion of the threadless atraumatic tip to a specified minor diameter;
- and
- wherein the diameter of the cylindrical portion of the threadless atraumatic tip is 90% to 100% of the minor diameter of the threads.
5 more elements
Dependencies are inferred from the claim text.