GLENOID ALIGNMENT TOOL

• US 20110029088A1
• Filed: 07/29/2010
• Published: 02/03/2011
• Est. Priority Date: 07/31/2009
• Status: Active Grant

• Current Assignee: Zimmer GmbH (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer GmbH (Zimmer Biomet Holdings, Inc.)
• Inventors: Amiri, Michele, Rauscher, Markus
• Granted Patent: US 8,702,717 B2
• Time in Patent Office: Days
• US Class Current: 623/19.11
• CPC Class Codes: A61B 17/1778 for the shoulder

Abstract

An orthopaedic alignment guide component is provided for preparing a patient'"'"'s bone socket, such as the glenoid of the patient'"'"'s scapula, to receive a prosthetic glenoid component. The orthopaedic alignment guide component includes a guide body for inserting a guide pin into the patient'"'"'s scapula and an inferior referencing arm for referencing an inferior surface of the patient'"'"'s scapula.

Claims

1. An orthopaedic alignment guide component for inserting a guide pin into a glenoid of a patient'"'"'s scapula, the glenoid having a glenoid surface, the scapula including an anterior surface, a posterior surface, a superior surface, and an inferior surface, the anterior surface of the scapula defining an anterior edge of the glenoid, the posterior surface of the scapula defining a posterior edge of the glenoid, the superior surface of the scapula defining a superior edge of the glenoid, and the inferior surface of the scapula defining an inferior edge of the glenoid, the orthopaedic alignment guide component comprising:

a guide body including a first surface, a second surface opposite the first surface that is contoured to abut the glenoid surface, an anterior portion, a posterior portion, a superior portion, and an inferior portion, the guide body defining a bore that extends through the guide body from the first surface to the second surface, the bore sized to receive the guide pin along a longitudinal axis; and

a referencing arm that extends from the inferior portion of the guide body to contact the inferior surface of the scapula when the second surface of the guide body abuts the glenoid surface.

2. The orthopaedic alignment guide component of claim 1, wherein the second surface of the guide body is convex, the second surface having an apex.

3. The orthopaedic alignment guide component of claim 2, wherein the longitudinal axis of the guide body intersects the apex of the second surface.

4. The orthopaedic alignment guide component of claim 2, wherein the longitudinal axis of the guide body is offset from the apex of the second surface.

5. The orthopaedic alignment guide component of claim 1, wherein the referencing arm faces superiorly toward the superior portion of the guide body.

6. The orthopaedic alignment guide component of claim 1, further comprising a handle coupled to the guide body.

7. The orthopaedic alignment guide component of claim 6, wherein the handle is rotatable relative to the guide body.

8. The orthopaedic alignment guide component of claim 6, wherein the guide body is able to tilt relative to the handle.

9. The orthopaedic alignment guide component of claim 6, wherein the guide body includes a guide wall that projects from the first surface to define a portion of the bore, the handle engaging the guide wall of the guide body.

10. A set of orthopaedic alignment guide components for inserting a guide pin into a glenoid of a patient'"'"'s scapula, the set comprising:

a first orthopaedic alignment guide component comprising;

a first guide body including a first superior end and a first inferior end, the first guide body extending a first length from the first superior end to the first inferior end, the first guide body defining a first bore that is sized to receive the guide pin; and

a first referencing arm extending from the first inferior end of the first guide body, the first referencing arm spaced a first distance from the first bore of the first guide body; and

a second orthopaedic alignment guide component comprising;

a second guide body including a second superior end and a second inferior end, the second guide body extending a second length from the second superior end to the second inferior end that exceeds the first length of the first guide body, the second guide body defining a second bore that is sized to receive the guide pin; and

a second referencing arm extending from the second inferior end of the second guide body, the second referencing arm spaced a second distance from the second bore of the second guide body, the second distance substantially equaling the first distance.

11. The set of claim 10, wherein the first guide body includes a first bone-contacting surface, a first top surface, and a first guide wall that protrudes from the first top surface to define the first bore, and wherein the second guide body includes a second bone-contacting surface, a second top surface, and a second guide wall that protrudes from the second top surface to define the second bore.

12. The set of claim 11, wherein the second bore extends through the second guide body at a second angle relative to the second guide wall and the first bore extends through the first guide body at a first angle relative to the first guide wall which is different than the second angle.

13. The set of claim 11, wherein the first bore extends through the first guide body in a substantially perpendicular direction relative to the first top surface of the first guide body.

14. The set of claim 11, wherein the second bore extends through the second guide body at an angle between approximately 2 degrees and 8 degrees relative to the second guide wall.

15. The set of claim 11, further comprising a third orthopaedic alignment guide component including a third guide body defining a third bore that is sized to receive the guide pin, the third guide body including a third bone-contacting surface, a third top surface, and a third guide wall that protrudes from the third top surface to define the third bore, wherein the first bore extends through the first guide body in a substantially parallel direction relative to the first guide wall, the second bore extends through the second guide body at an angle between approximately 2 degrees and 4 degrees relative to the second guide wall, and the third bore extends through the third guide body at an angle between approximately 6 degrees and 8 degrees relative to the third guide wall.

16. The set of claim 10, further comprising a handle configured to couple to either of the first and second guide bodies.

17. A method for inserting a guide pin into a glenoid of a patient'"'"'s scapula, the glenoid having a glenoid surface, the scapula including an anterior surface, a posterior surface, a superior surface, and an inferior surface, the anterior surface of the scapula defining an anterior edge of the glenoid, the posterior surface of the scapula defining a posterior edge of the glenoid, the superior surface of the scapula defining a superior edge of the glenoid, and the inferior surface of the scapula defining an inferior edge of the glenoid, the method comprising the steps of:

providing an orthopaedic alignment guide comprising a guide body and a referencing arm, the guide body defining a bore;

positioning the guide body against the glenoid surface such that the referencing arm abuts the inferior surface of the scapula; and

inserting the guide pin through the bore of the guide body and into the glenoid surface.

18. The method of claim 17, wherein the positioning step comprises wrapping the referencing arm around the inferior edge of the glenoid to bisect the inferior edge.

19. The method of claim 17, wherein the positioning step comprises moving the guide body vertically toward the superior edge of the glenoid until the referencing arm abuts the inferior surface of the scapula, the referencing arm facing in a superior direction.

20. The method of claim 17, wherein the inserting step comprises inserting the guide pin in a direction substantially perpendicular to the glenoid surface.

21. The method of claim 17, wherein the inserting step comprises inserting the guide pin at an angle through the guide body.