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US 2025/0359896 A1Published application
Radially expandable bone screw
OwnerShawn P. Fojtik, Cortny Robisoninventors
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Abstract
A bone screw includes an expandable section with struts that expand and twist to engage bone and, thus, to secure the orthopedic screw within the bone. Expansion of the expandable section may occur as the expandable section is axially or longitudinally compressed. Such compression may be effected with an interior element of the bone screw and, optionally, with a tool. Methods for implanting bone screws are also disclosed.
Claims20
A bone screw, comprising:
- an exterior including:
- a head;
- a proximal portion extending distally from the head and including proximal threads;
- an intermediate portion distally adjacent to the proximal portion and including an expandable element comprising a plurality of slits extending along a length of the intermediate portion and arranged to define a plurality of struts extending along the length of the intermediate portion that extend radially and twist upon shortening of the intermediate portion;
- and
- a distal portion distally adjacent to the intermediate portion;
- and
- an interior, including:
- a head;
- an elongated element extending through interiors of the proximal portion and the intermediate portion of the exterior, and
- a distal portion engaging the distal portion of the exterior in a manner that enables the distal portion of the exterior to be selectively forced toward the proximal portion of the exterior to enable the shortening of the intermediate portion of the exterior.
8 more elements
A pedicle screw, comprising:
- an exterior including:
- a head comprising a receptacle for a rod;
- a proximal portion extending distally from the head and including proximal threads;
- an intermediate portion distally adjacent to the proximal portion and including an expandable element comprising a plurality of slits extending along a length of the intermediate portion and arranged to define a plurality of struts extending along the length of the intermediate portion that extend radially and twist upon shortening of the intermediate portion;
- and
- a distal portion distally adjacent to the intermediate portion and including distal threads;
- and
- an interior, including:
- a head;
- an elongated element extending through interiors of the proximal portion and the intermediate portion of the exterior, and
- a distal portion engaging the distal portion of the exterior in a manner that enables the distal portion of the exterior to be selectively forced toward the proximal portion of the exterior to enable the shortening of the intermediate portion of the exterior.
8 more elements
A method for using a bone screw, comprising:
- screwing the bone screw into a bone;
- and
- longitudinally compressing an intermediate portion of an exterior of the bone screw, including applying a radial force and a twisting force to struts of the intermediate portion.
Dependencies are inferred from the claim text.