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1. (WO2018129247) MONTANTS DE FIXATION POLY-AXIAUX
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

THE CLAIMED INVENTION IS:

1. A method of attaching an orthopedic device to a bone, the method comprising

locating a baseplate on a glenoid of a patient, the base plate including at least a first fastener bore extending through the baseplate;

creating by passing through the first fastener bore, a first post hole in the glenoid for locating a first fixation post within the glenoid, wherein the first fixation post includes a quasi-spherical head with a shaft extending therefrom to a distal end of the first fixation post, the quasi-spherical head including a textured outer surface for contacting at least a first wall of the first fastener bore, the first fixation post also including a porous metal sleeve received on the shaft; and

driving the distal end of the first fixation post through the first fastener bore and into the first post hole such that an outer surface of the porous metal sleeve engages a surface of the first post hole and such that the textured outer surface of the quasi-spherical head contacts at least the first wall of the first fastener bore so as to removeably lock the quasi-spherical head to the baseplate, wherein said driving creates an initial compression between the baseplate and the glenoid, and wherein the porous metal sleeve is configured to receive bone ingrowth into the porous metal sleeve for maintaining said initial compression between the baseplate and the glenoid.

2. The method of claim 1, wherein creating a first post hole in the glenoid includes drilling a first post hole in the glenoid.

3. The method of claim 2, wherein drilling a first post hole includes using a drill bit in combination with atoolapplyingrotary motion to the drill bit to remove bone material from the first post hole.

4. The method of claim 2, wherein drilling a first post hole includes using a chisel tool in combination with a tool apply inglinear motion to the chisel tool to remove bone material from the first post hole.

5. The method of claim 1 , wherein contacting at least the first wall of the first fastener bore with the textured outer surface of the quasi-spherical head includes positioning at least a portion of a face of the textured outer surface of the quasi-spherical head against at least the first wall of the first fastener bore.

6. The method of claim 1, wherein driving the distal end of the first fixation post includes applying an impact loading force to the quasi-spherical head of the first fixation post.

7. The method of claim 1, wherein driving the distal end of the first fixation post includes applying a press loading force to the quasi-spherical head of the first fixation post.

8. The method of claim 1 further comprising

creating by passing through a second fastener bore, a second post hole in the glenoid for locating a second fixation post within the glenoid, wherein the second fixation post includes a quasi-spherical head with a shaft extending therefrom to a distal end of the second fixation post, the quasi-spherical head including a textured outer surface for contacting at least a first wall of the second fastener bore, the second fixation post also including a porous metal sleeve received on the shaft; and

driving the distal end of the second fixation post through the second fastener bore and into the second p ost hole such that an outer surface of the p orous metal sleeve engages a surface of the second post hole and such that the textured outer surface of the quasi-spherical head engages at least the first wall of the second fastener bore so as to removeably lock the quasi-spherical head to the baseplate, wherein said driving creates an initial compression between the baseplate and the glenoid, wherein the porous metal sleeve is configured to receive bone ingrowth into the porous metal sleeve for maintaining said initial compression between thebaseplate and the glenoid.

9. The method of claim 8, wherein the second fixation post is aligned independently from the first fixation post.

10. The method of claim 8, wherein engaging at least the first wall of the second fastener bore with the textured outer surface of the quasi-spherical head includes positioning at least a portion of a face of the textured outer surface of the quasi-spherical head against at least the first wall of the second fastener bore.

11. The method of claim 8, wherein driving the distal end of the second fixation p ost includes ap p ly ing an imp act loading force to the quasi-sp herical head of the second fixation post.

12. The method of claim 8, wherein driving the distal end of the second fixation post includes applying a press loading force to the quasi-spherical head of the second fixation p ost .

13. A fixation p ost for attaching an orthop edic device to a bone comp rising a quasi-spherical head with a textured outer surface;

a shaft including a proximal end attached to the quasi-spherical head, a distal end opposite the proximal end, and a bearing surface between the proximal and distal ends;

a porous metal sleeve including a central bore with a bore surface, the porous metal sleeve surrounding at least a portion of the shaft, wherein the bore surface substantially conforms with the bearing surface; and

a cap attached to the distal end of the shaft to retain the p orous metal sleeve on the shaft.

14. The fixation post of claim 13, wherein the quasi-spherical head and the shaft form a unitary core.

15. The fixation post of claim 13, wherein the porous metal sleeve includes a proximal sleeve surface in contact with the quasi-spherical head and a distal sleeve surface in contact with the cap.

16. The fixation post of claim 13, wherein the shaft includes an anti-rotation feature.

17. The fixation post of claim 16, wherein the anti-rotation feature includes the shaft with a generally elliptical cross-section.

18. The fixation post of claim 16, wherein the anti-rotation feature includes a textured proximal cap surface configured to conform to the distal sleeve surface.

19. The fixation post of claim 13, wherein the cap includes a distal cap surface and wherein the distal cap surface is generally hemisp helically shaped.

20. The fixation post of claim 13, wherein the cap includes a distal cap surface and wherein the distal cap surface is generally conically shaped.