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1. WO2007107842 - SYSTÈME D'ALÉSEUSE GUIDÉE POUR REFORMER UN OS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

AMENDED CLAIMS

[Received by the International Bureau on 11 November 2007 (11.11.07);

original claims 1-19 replaced by amended claims 1-21]

+STATEMENT

1. A guided reamer (10) having a central cannulation (12, 12a) adapted to receive a guide (14), and a profile cutting form (24) having cutting teeth (40) formed therein for cutting a form of a defined profile, and a plurality of planing teeth (52a, 52b) fixed at an axial end of the reamer, the planning teeth being radially disposed on an internal surface (32) of the reamer (10) wherein the cannulation (12, 12a) is formed in the axial guide assembly (70, 70') affixed to the axial end of the reamer, and wherein the reamer has a circumferential rim (34) having rim cutting teeth (36) disposed to cut to an outside of the rim and an inside of the rim, and further having face cutting teeth (37) adapted to cut an annular channel into bone.

2 . The reamer (10) of claim 1, wherein, the cannulation (12, 12a) in the guide assembly (70, 70') is sized and surface treated to be a precise, sliding fit with the drill pin (14), in order to provide substantially all axial guidance to the reamer (10) when cutting bone (20).

3. The reamer (10) of claim 1, wherein, the cannulation (12) in the reamer (10) is a clearance hole (12).

4. The reamer (10) of claim 1, wherein the plurality of planing teeth (52a, 52b) are fixed adjacent an axial end boss (44) at an axial end of the reamer.

5. The reamer (10) of claim 1, wherein the cannulation (12, 12a) in the reamer (10) is sized and surface treated to be a precise, sliding fit with the

drill pin (14), in order to provide substantially all the axial guidance to the reamer when cutting bone (20).

6. The reamer (10) of claim 1, wherein the guide assembly (70, 70') includes a surface (84a, 84b) in n plane parallel to a plane (46) of the at least one bar (82), optionally offset at a distance d which enables that surface (84a, 84b) to contact an associated surface (68) referenced to the bone (20), in order to prevent the cutting form (24) from plunging so fat over the bone as to potentially damage the bone stem (22).

7. The reamer (10) of claim 1 , wherein the offset surface (84) is preferably polished to reduce friction during relative rotational movement between this surface (84) and the surface (68) referenced to the bone (20).

8. The reamer (10) of claim 1, wherein the drive interface (72) is comprised of at least one bar (82), traversing a center of the boss (26, 26').

9. The reamer (10) of claim 1, wherein the drive interface (72) is comprised of at least two bars (82), traversing a center of the boss (26, 26').

10. The reamer (10) or claim 1, wherein the drive interface (72) is comprised of at least three bars (82), traversing a center of the boss (26, 26').

11. The reamer (10) of claim 1, wherein the drive interface (72) is comprised of tour bars (82), traversing a center of the boss (26, 26').

12. The reamer of claim 1, wherein the cannulation (12, 12a) is supported about an axial end boss (44) of the cutting form (24).

13. The reamer of claim 1, wherein the guide (14) is a drill pin.

14. The reamer of claim 1, wherein the guide (14) is a guide wire.

15. The guided reamer (10) of claim 1, wherein an axial drive interface (72) is affixed to the reamer adjacent the axial end boss (44), the interface adapted for imparting rotation to the reamer (10).

16. The reamer (10) of claim 1, wherein the reamer is adapted to be supported by a cannulated reamer handle (74) having i. a bayonet locking device (76) capable of locking the handle (74) to the drive interface (72) of the reamer (10) and ii. a corresponding central cannulation (80), permitting the guide (14) to pass at least part way therethrough.

a 17. The reamer (10) of claim 14, wherein the bayonet locking mechanism (76) includes recesses (86) which catch portions of the bar structure (30).

18. The reamer (10) of claim 2, wherein the bayonet locking mechanism (76) includes recesses (86) which catch portions of the bar structure (30).

19. The reamer (10) of claim 1, wherein the guide assembly (70. 70') is comprised of a hollow post (26, 26') attached to the axial end boss (11) of the cutting form (24). The post having bars (32) attached thereto which are axially spaced apart and extend radially out from the post

20. A tool kit (100) for cutting a defined profile suitable for mounting a prosthesis (90), the kit including:

(a) at least one reamer ( 10)) according to claim 1;

(b) a reamer holder (74) capable of imparting torque to the at least one reamer;

(c) at least one guide pin (14) adapted to be received in a cannulation (12, 12a) of the reamer;

(d) optionally, at least one prosthesis (90); and

(C) a case (102) for organizing components of the kit

21. A guided reamer (10) having a central cannulation (12, 12a) adapted to receive a drill pin (14) secured in a manner which is axially aligned with the stem (22) of the bulbus bone joint (20), having a profile cutting form (24) with cutting teeth (40) formed therein for cutting a form of a defined profile, a circumferential rim (34) having rim cutting teeth (36) disposed to cut to an outside of the rim and an inside of the rim, having face cutting teeth (37) adapted to cut an annular channel into bone and a plurality of planing teeth (52) radially disposed on an internal surface adjacent the axial end boss (44), wherein the cannulation (12, 12a) is supported at the apex of the cutting form (24) and is formed in a guide assembly (70, 70') affixed to the axial end boss, the guide assembly adapted for imparting rotation to the reamer (12), wherein further, the reamer is adapted to be supported by a cannulated reamer handle (74) having a bayonet locking device (76) capable of locking the handle (74) to the guide assembly (70, 70') of the cannulated reamer (10) and a corresponding central cannulation (86), permitting the drill pin (14) to pass at least part way therethrough.

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