System and Method for Implanting a Secondary Glenoid Prosthesis

• US 20140277520A1
• Filed: 03/12/2013
• Published: 09/18/2014
• Est. Priority Date: 03/12/2013
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: DePuy Synthes Products LLC (Johnson & Johnson)
• Inventors: Chavarria, Jason M., Lappin, Kyle E., Holda, Matthew G.
• Granted Patent: US 9,044,330 B2
• Time in Patent Office: Days
• US Class Current: 623/19.13
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/40 for shoulders
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2/4612 of shoulders
• CPC Class Codes: A61F 2002/30484 Mechanically expandable devices located on the first prosthetic part for locking into or onto the second prosthetic part
• CPC Class Codes: A61F 2002/3069 Revision endoprostheses
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/4085 having a convex shape, e.g. hemispherical heads

Abstract

A method of implanting a shoulder prosthesis in a scapula of a patient includes the step of placing a guide over a primary glenoid component previously implanted within the scapula of the patient. The method further includes the steps of removing the primary glenoid component from the scapula and preparing the scapula for implantation of a secondary glenoid component, wherein the removing and preparing steps occur simultaneously.

Claims

1. A method of implanting a shoulder prosthesis in a scapula of a patient, the method including the steps of:

placing a guide over a primary glenoid component previously implanted within the scapula of the patient;

removing the primary glenoid component from the scapula; and

preparing the scapula for implantation of a secondary glenoid component, wherein the removing and preparing steps occur simultaneously.

2. The method of claim 1, wherein the removing step includes the steps of:

utilizing a tool to penetrate the primary glenoid and into the glenoid surface of the scapula;

creating a void in the bone tissue of the scapula that is at least as large as and occupies at least as much space as an anchor extending from the primary glenoid component and which implants the primary glenoid component within the bone tissue of the scapula, thereby eliminating the anchor; and

removing unanchored primary glenoid component from the bone tissue of the scapula.

3. The method of claim 2, wherein the scapula is prepared for implantation of the secondary glenoid component by creation of the void in the bone surface of the scapula.

4. The method of claim 3, further including the steps of:

providing the secondary glenoid component comprising an anchor having a geometry that generally conforms to a geometry of the void in the bone tissue of the scapula; and

implanting the anchor of the secondary glenoid component within the void.

5. The method of claim 4, further including the step of:

assessing the extent of damage to the shoulder of the patient; and

if the extent of the damage is at a first level, implanting an anchor of an anatomic secondary glenoid component within the void;

or

if the extent of the damage is at a second level, implanting an anchor of a reverse secondary glenoid component within the void;

wherein the anchor of the anatomic secondary glenoid component and the anchor of the reverse secondary glenoid have geometries that generally conform to a geometry of the void.

6. A method of implanting a shoulder prosthesis in a scapula of a patient, the method including the steps of:

creating a void in the scapula of the patient by penetrating the primary glenoid component, wherein the void encompasses an area within the bone tissue of the scapula occupied by an anchor extending from the primary glenoid component and implanted within the scapula of the patient;

removing fragments of the primary glenoid component that are no longer anchored to the bone tissue of the scapula after the step of creating a void; and

implanting a secondary glenoid component within the void.

7. The method of claim 6, wherein the secondary component comprises:

a platform having a lateral surface and a medial surface opposite the lateral surface and adapted to contact the scapula of the patient; and

at least one anchor extending from the medial surface of the platform, wherein the anchor is adapted to be implanted within the void.

8. The method of claim 7, wherein the anchor is in the form of a peg extending outwardly from a central portion of the medial surface of the platform.

9. The method of claim 7, wherein the anchor is in the form of a keel extending outwardly from the medial surface of the platform.

10. The method of claim 6, further including the step of:

assessing the extent of damage to the shoulder of the patient during surgery; and

if the extent of the damage is at a first level, implanting an anchor of an anatomic secondary glenoid component within the void;

or

if the extent of the damage is at a second level, implanting an anchor of a reverse secondary glenoid component within the void;

wherein the anchor of anatomic secondary glenoid component and the anchor of the reverse secondary glenoid have geometries that generally conform to a geometry of the void;

wherein the assessing step allows a surgeon to change plans intra-operatively between anatomic and reverse secondary glenoid components.

11. The method of claim 6, wherein the step of creating a void includes the steps of:

placing a guide over a primary glenoid component previously implanted within the scapula of the patient;

removing the primary glenoid component from the scapula; and

preparing the scapula for implantation of a secondary glenoid component, wherein the removing and preparing steps occur simultaneously.

12. The method of claim 6, wherein the scapula is prepared for implantation of the secondary glenoid component by creation of the void in the glenoid surface of the scapula.

13. The method of claim 12, further including the steps of:

providing the secondary glenoid component comprising an anchor having dimensions that conform to dimensions of the void in the glenoid surface of the scapula; and

implanting the anchor of the secondary glenoid component within the void.

14. A method of implanting a shoulder prosthesis in a scapula of a patient, the method including the steps of:

accessing the bone tissue of the patient'"'"'s scapula;

creating a void within the bone tissue of the patient'"'"'s scapula;

assessing the extent of damage to the shoulder of the patient; and

if the extent of the damage is at a first level, implanting a first anchor of an anatomic glenoid component within the void;

or

if the extent of the damage is at a second level, implanting a second anchor of a reverse glenoid component within the void;

wherein the first anchor of the anatomic glenoid component and the second anchor of the reverse secondary glenoid have geometries that conform generally conform to a geometry of the void.

15. The method of claim 14, further including the steps of:

placing a guide over a primary glenoid component previously implanted within the scapula of the patient;

removing the primary glenoid component from the scapula; and

preparing the scapula for implantation of a secondary glenoid component, wherein the removing and preparing steps occur simultaneously.

16. The method of claim 14, wherein the anatomic glenoid component and the reverse glenoid component are part of a platform system including:

a platform having an anchor extending therefrom;

a bearing attachable to the platform and having a bearing surface that forms an articulation surface for articulation of a humeral head, wherein the bearing forms the anatomic glenoid component; and

a glenosphere component attachable to the platform and having a surface that articulates upon a bearing surface of a humeral cup.

17. The method of claim 16, further including the step of:

determining intra-operatively whether to implant an anatomic secondary glenoid component or a reverse glenoid component.

18. The method of claim 17, wherein the determining step is undertaken after implanting the anchor of the platform within the bone tissue of the scapula and, once the determining step is completed, either the bearing or the glenosphere component is attached to the platform.

19. A system for implanting a shoulder prosthesis in a scapula of a patient, the system including:

a primary glenoid component including an anchor adapted to be implanted within the scapula of the patient in a primary surgical procedure;

a secondary glenoid component adapted to be implanted within the scapula of the patient in a secondary surgical procedure and including;

a platform having an anchor extending therefrom; and

a glenosphere component attachable to the platform and having a surface that articulates upon a bearing surface of a humeral cup and which forms a reverse secondary glenoid component;

wherein the anchor of the secondary glenoid component includes features similar to features of the anchor of the primary glenoid component.

20. The system of claim 19, wherein the secondary glenoid component forms a system that includes a bearing attachable to the platform and having a bearing surface that forms an articulation surface for articulation of a humeral head, wherein the baring forms an anatomic secondary glenoid component.