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US 11,376,050 B2Granted
Bone screw
AssigneeMedos International Sarl
InventorsJohn DiVincenzo, Nicholas Pavento, Ralph Solitario, Eric Biester
Life of this patent
Estimating the term…
Abstract
Various bone screws configured to be implanted into bone and methods of use are provided. In an exemplary embodiment, a bone screw is provided with an elongate shank and a head with a drive feature configured to couple with a driver tool for being advanced into bone and a threaded shank. The screw can have a distal end or tip that has one or more cutting edges thereon configured to cut bone as the bone screw is inserted into bone.
Claims20
A pedicle screw, the pedicle screw comprising:
- an elongate shank defining a central longitudinal axis, the elongate shank having proximal and distal ends;
- and
- at least one thread formed on the elongate shank and extending between the proximal and distal ends, a distal-most end of the at least one thread having a leading cutting edge extending along a line perpendicular to and passing through the central longitudinal axis from an outer diameter of the screw toward the central longitudinal axis, a leading surface extending proximally from the leading cutting edge, the leading surface extending at an acute angle relative to the central longitudinal axis of the elongate shank and having a curved portion, a trailing surface extending from the leading cutting edge such that the leading surface and the trailing surface are opposite one another across the leading cutting edge, the trailing surface being a substantially flat planar distal-most surface, the trailing surface and the leading surface extending at an acute angle relative to one another, the trailing surface terminating in a trailing edge disposed opposite to the leading cutting edge across the trailing surface, and a third surface extending proximally from the trailing edge.
A bone screw, the bone screw comprising:
- an elongate body having a longitudinal centerline extending between a first and a second end thereof;
- a distal tip at the second end of the elongate body having at least one cutting edge configured to cut bone, the at least one cutting edge having a positive rake angle, the at least one cutting edge extending along a line perpendicular to and passing through the longitudinal centerline of the elongate body, the at least one cutting edge being defined between a leading surface and a trailing surface, the leading surface extending proximally from the cutting edge and having a curved portion, the trailing surface being a substantially flat planar distal-most surface on the distal tip;
- and
- at least one thread extending along the body from the at least one cutting edge towards the first end.
1 more element
Dependencies are inferred from the claim text.