Flexible bone screw
AssigneeSyntorr, Inc.
InventorDaniel L. MARTIN
Life of this patent
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Abstract
A flexible bone screw for insertion into the intramedullary cavity of a fractured bone facilitates enduring fixation of the fracture. The flexible bone screw includes a substantially smooth shaft and a threaded portion positioned at one end of the shaft, wherein the outer diameter of the threaded portion is greater than the shaft diameter and the length of the threaded portion is about 20% of the overall length of the flexible bone screw or less.
Claims20
A flexible bone screw comprising:
- a shaft;
- and
- an enlarged diameter portion directly joined to a transition portion between the shaft and the enlarged diameter portion, the transition portion having an outer diameter that is smaller than that of the enlarged diameter portion and the enlarged diameter portion having threads along the entire length thereof,
- wherein a ratio of the length of the enlarged diameter portion to the length of the flexible bone screw is less than 0.2 or less, and a ratio of the length of the flexible bone screw to the diameter of the shaft is at least 50.
A flexible bone screw comprising:
- a shaft;
- and
- an enlarged diameter portion directly joined to a transition portion between the shaft and the enlarged diameter portion, the transition portion having an outer diameter that is smaller than that of the enlarged diameter portion and the enlarged diameter portion having threads along the entire length thereof,
- wherein a ratio of the length of the enlarged diameter portion to the length of the flexible bone screw is less than 0.2 or less, and an elastic bending arc that is attainable by the flexible bone screw is at least 15 degrees.
A flexible bone screw configured for insertion into a side of a humerus bone and advancement substantially along a longitudinal axis of the humerus bone after the insertion, comprising:
- a shaft;
- and
- an enlarged diameter portion directly joined to a transition portion between the shaft and the enlarged diameter portion, the transition portion having an outer diameter that is smaller than that of the enlarged diameter portion and the enlarged diameter portion having threads along the entire length thereof,
- wherein a ratio of the length of the enlarged diameter portion to the length of the flexible bone screw is less than 0.2, and an elastic bending arc that is attainable by the flexible bone screw is large enough for the flexible bone screw to be inserted into the side of the humerus bone at an oblique angle and be advanced substantially along the longitudinal axis of the humerus bone with associated elastic bending.
Dependencies are inferred from the claim text.