Glenoid reamer

Patent metadata

Field	Value
Publication number	US-10363047-B2
Application number	US-201615227193-A
Country	US
Kind code	B2
Filing date	Aug 3, 2016
Priority date	Dec 13, 2011
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

A bone reamer includes a first member having a first hub and a second member having a second hub. The first hub can extend along a first axis and have a pair of elongated cutting arms that are fixed to the first hub. The elongated cutting arms can extend along a second axis that is generally perpendicular relative to the first axis. The first hub can define a track thereon. The second hub can extend along a third axis. The second member can have a second pair of elongated cutting arms that are fixed to the second hub and extend along a fourth axis that is generally perpendicular to the third axis. The second member can have a track follower extending thereon and that is configured to slidably advance along the track causing the first and second members to move between a collapsed position and an expanded position.

First claim

The invention claimed is:

1. A glenoid reamer comprising:
a first member having a first elongated hub that extends along a first axis and a first pair of elongated cutting arms fixed to the first elongated hub and extending along a second axis generally perpendicular relative to the first axis, wherein the first elongated hub defines a track thereon; wherein the track is a separate distinct slot extending transverse to the first elongated hub; and
a second member having a second elongated hub that extends along a third axis and a second pair of elongated cutting arms fixed to the second elongated hub and extending along a fourth axis generally perpendicular relative to the third axis,
wherein the first elongated hub encircles a portion of the second elongated hub for rotatable movement with the second elongated hub, the second member having a track follower extending thereon, wherein the track follower is a pin extending transverse to the second elongated hub, the track follower configured to slidably advance along the track causing the first and second members to move between a collapsed position and an expanded position,
wherein in the collapsed position, the first and second pair of cutting arms occupy a position where the second and fourth axes are substantially parallel and
wherein in the expanded position, the first and second pair of cutting arms occupy a position where the second and fourth axes are non-parallel,
wherein the first pair of elongated cutting arms and the second pair of elongated cutting arms curve in a rotational direction of the glenoid reamer.

2. The glenoid reamer of claim 1 , wherein the first and second elongated hubs are cannulated.

3. The glenoid reamer of claim 1 , wherein the first member occupies a position proximal relative to the second member in the collapsed position.

4. The glenoid reamer of claim 1 , wherein the first elongated hub defines a relief thereon configured to receive the second pair of cutting arms in the expanded position.

5. The glenoid reamer of claim 1 , wherein the first and second pairs of cutting arms have cutting teeth extending therefrom.

6. The glenoid reamer of claim 1 , where rotation of the second member in a first direction causes the first member to translate from a first position to a second position.

7. The glenoid reamer of claim 1 , wherein the second axis passes through a center of gravity of the first pair of elongated cutting arms.

8. The glenoid reamer of claim 1 , wherein the first pair of elongated cutting arms and the second pair of elongated cutting arms each are propeller shaped.

9. The glenoid reamer of claim 1 , wherein each of the first pair of elongated cutting arms includes a back surface that is perpendicular to the first axis.

10. The glenoid reamer of claim 1 , wherein the first pair of elongated cutting arms include first distal ends and first proximal ends, the second pair of elongated cutting arms including second distal ends and second proximal ends, the first distal ends, the first proximal ends, the second distal ends, and the second proximal ends laying in a plane defined by the second axis and the fourth axis.

11. A glenoid reamer comprising:
a first member including:
a first hub having a first length and extending along a first axis, the first hub defining a groove, wherein the groove is a separate distinct groove extending transverse to the first hub; and
a first pair of cutting arms having a first pair of cutting surfaces that extend from the first hub along a second axis and curve in a rotational direction of the glenoid reamer;

and
a second member including:
a second hub having a second length and extending along a third axis and passing through the first hub, the second length being greater than the first length,
the second hub having a track follower extending thereon, wherein the track follower is a pin extending transverse to the second hub,
the pin extending from the second hub and sized to translate within the groove, and
a second pair of cutting arms having a second pair of cutting surfaces that extend from the second hub along a fourth axis and curve in the rotational direction of the glenoid reamer,
wherein the first member is configured to translate from a first position to a second position upon rotation of the second member.

12. The glenoid reamer of claim 11 , wherein the first axis and the second axis intersect proximate a center of gravity of the first member.

13. The glenoid reamer of claim 11 , wherein the third axis and the fourth axis intersect proximate a center of gravity of the second member.

14. The glenoid reamer of claim 11 , wherein the first axis is perpendicular to the second axis.

15. The glenoid reamer of claim 11 , wherein the third axis is perpendicular to the fourth axis.

16. The glenoid reamer of claim 11 , wherein the first pair of cutting arms and the second pair of cutting arms each include a plurality of cutting teeth extending therefrom.

17. The glenoid reamer of claim 11 , wherein the first pair of cutting arms has a first curved profile along the second axis and the second pair of cutting arms has a second curved profile along the fourth axis.

18. The glenoid reamer of claim 11 , wherein the first hub defines a cannula sized to receive the second hub.

19. The glenoid reamer of claim 11 , wherein the second axis is perpendicular to the first axis, and wherein the fourth axis is parallel to the third axis and perpendicular to the fourth axis.

20. A glenoid reamer comprising:
a first member comprising:
a first elongated hub that extends along a first axis,
wherein the first elongated hub defines a track thereon, wherein the track is a separate distinct slot extending transverse to the first axis;

a first pair of elongated cutting arms fixed to the first elongated hub and extending along a second axis generally perpendicular relative to the first axis,
the first pair of elongated cutting arms including a first pair of cutting surfaces that form a cutting plane;

and
a second member comprising:
a second elongated hub that extends along a third axis, and
a second pair of elongated cutting arms fixed to the second elongated hub and extending along a fourth axis generally perpendicular relative to the third axis, the second pair of elongated cutting arms including a second pair of cutting surfaces that lie in the cutting plane,

wherein the first elongated hub encircles a portion of the second elongated hub for rotatable movement with the second elongated hub, the second member having a track follower extending thereon, wherein the track follower is a pin extending transverse to the second elongated hub, the track follower configured to slidably advance along the track causing the first and second members to move between a collapsed position and an expanded position,
wherein in the collapsed position, the first and second pair of cutting arms occupy a position where the second and fourth axes are substantially parallel and
wherein in the expanded position, the first and second pair of cutting arms occupy a position where the second and fourth axes are non-parallel,
wherein the first pair of elongated cutting arms and the second pair of elongated cutting arms curve in a rotational direction of the glenoid reamer.

Assignees

• Biomet Mfg Llc

Inventors

• Kehres Clinton E
• Winslow Nathan A
• Fritzinger Daniel D

Classifications

• A61B17/1617 Primary

  with mobile or detachable parts · CPC title

• A61B17/1684

  for the shoulder · CPC title

• A61B17/1659

  Surgical rasps, files, planes, or scrapers · CPC title

• A61B17/1631

  Special drive shafts, e.g. flexible shafts (A61B17/1642, A61B17/164 take precedence) · CPC title

• A61B17/1642

  for producing a curved bore · CPC title