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1. (WO2019002990) VIS À OS
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

What is claimed is:

1. A 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 transverse to the central longitudinal axis from an outer diameter of the screw toward the central longitudinal axis, and 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.

2. The pedicle screw of claim 1, wherein the acute angle is in a range of 5 to 15 degrees.

3. The pedicle screw of claim 1, wherein the acute angle of the leading surface is approximately 10 degrees.

4. The pedicle screw of claim 1, wherein a radial outer edge of the distal-most end of the at least one thread is arcuate.

5. The pedicle screw of claim 1, wherein the at least one thread comprises first and second threads that define an awl-shaped tip along a longitudinal cross-section.

6. The pedicle screw of claim 1, further comprising a trailing surface extending from the leading cutting edge, the trailing surface and the leading surface extending at an acute angle relative to one another.

7. The pedicle screw of claim 1, further comprising a head on the proximal end of the elongate shank, the head including a drive feature for coupling with a driver.

8. The pedicle screw of claim 1, wherein the elongate shank has an inner lumen extending longitudinally therethrough.

9. The pedicle screw of claim 1 , wherein the at least one thread comprises first and second threads that are offset from one another by 180 degrees.

10. The pedicle screw of claim 1, wherein the at least one thread comprises a first thread having extending from the proximal end to the distal end of the elongate shank, and a second thread extending from the proximal end and terminating at a mid-portion of the elongate shank.

11. The pedicle screw of claim 1, wherein the elongate shank has fenestrations formed therein.

12. A 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; and

at least one thread extending along the body from the at least one cutting edge towards the first end.

13. The bone screw of claim 12, wherein the distal tip has an awl-shaped cross-section along the longitudinal centerline.

14. The bone screw of claim 12, further comprising a head at the first end of the elongate body with a drive feature formed therein.

15. The bone screw of claim 12, wherein a radial outer edge of the distal tip is arcuate.

16. The bone screw of claim 12, wherein the elongate body has an inner lumen extending therethrough.

17. The bone screw of claim 12, wherein the at least one thread has a constant thread pitch.

18. The bone screw of claim 12, wherein the at least one thread comprises a first thread having a constant thread pitch extending between the first and second ends of the elongate body, and a second thread that extends from the first end and terminates proximal to the second end of the elongate body.

19. The bone screw of claim 12, wherein the elongate body has fenestrations formed therethrough.