Glenoid resurfacing system and method

• US 10,478,200 B2
• Filed: 05/26/2017
• Issued: 11/19/2019
• Est. Priority Date: 04/17/2009
• Status: Active Grant

• Current Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Original Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Inventors: Sikora, George, Ek, Steven W.
• Primary Examiner(s): Beccia, Christopher J
• Application Number:
  US15/606,643
• Publication Number:
  US 20180132869A1
• Time in Patent Office: 907 Days
• CPC Class Codes: A61B 17/1684 for the shoulder
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2002/30233 Stepped cylinders, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/30818 castellated or crenellated
• CPC Class Codes: A61F 2002/30879 Ribs
• CPC Class Codes: A61F 2002/30881 Circumferential ribs, flanges or fins
• CPC Class Codes: A61F 2002/30884 Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2230/0069 cylindrical

Abstract

The present disclosure relates to a system and method for repairing an articular surface. A guide pin may be secured to an articular surface of a glenoid, wherein the guide pin defines a working axis and the working axis is positioned at an angle α relative to the articular surface, wherein angle α is less than or equal to 90 degrees. An excision device may be advanced over the guide pin, wherein the excision device includes a cannulated shaft and at least one cutter, wherein the at least one cutter is generally aligned in a single plane. A generally hemi-spherical excision site may be formed with the excision device within the articular surface of the glenoid.

Claims

1. A method for repairing a defect on a portion of an articular surface of a patient'"'"'s glenoid, said method comprising:

advancing an excision device along a working axis and said working axis is positioned at an angle α

relative to the articular surface, wherein angle α

is less than or equal to 90 degrees, wherein said excision device includes a shaft and at least one cutter extending radially outwardly from said shaft, wherein said at least one cutter is generally aligned in a single plane extending along a longitudinal axis of said shaft; and

rotating said excision device about said working axis to form a generally hemi-spherical excision site within the articular surface of the glenoid.

2. The method of claim 1, wherein said excision device is configured to be disposed at said angle α

relative to the articular surface, wherein 90 degrees≥

α

≥

45 degrees.

3. The method of claim 1, further comprising:

securing a guide pin to said articular surface of said glenoid proximate to said defect, wherein said guide pin defines said working axis; and

advancing an excision device over said guide pin.

4. The method of claim 1, wherein said defect is disposed proximate to a perimeter of said articular surface and wherein said excision site extends to said perimeter.

5. The method of claim 4, wherein said defect comprises a missing portion of said perimeter of said articular surface.

6. The method of claim 1, wherein said at least one cutter includes a first cutter and a second cutter, which extend generally radially outwardly from the shaft at an angle of approximately 180 degrees from each other.

7. The method of claim 1, wherein said at least one cutter has a cross-sectional thickness of 0.5 mm to 3.0 mm.

21. The method of claim 1, wherein said excision device is configured to be disposed at said angle α

relative to the articular surface, wherein angle α

is <

90 degrees.

8. A method for repairing a defect on a portion of an articular surface of a patient'"'"'s glenoid, said method comprising:

advancing an excision device along a working axis and said working axis is positioned at an angle α

relative to the articular surface, wherein angle α

is selected to avoid contact with a corresponding humerous, wherein said excision device includes a shaft and at least one cutter extending radially outwardly from said shaft, wherein said at least one cutter is generally aligned in a single plane extending along a longitudinal axis of said shaft; and

rotating said excision device about said working axis to form a generally hemi-spherical excision site within the articular surface of the glenoid.

9. A system for repairing a defect on a portion of an articular surface of a patient'"'"'s glenoid, said system comprising:

an excision device including;

a shaft configured to be advanced along a working axis, and

at least one cutter configured to form a generally hemispherical excision site in said glenoid about said working axis, wherein said at least one cutter has a cross-sectional thickness of 0.5 mm to 3.0 mm and said at least one cutter includes a cutting surface having a generally arcuate shape sweeping towards a proximal end of said shaft; and

an implant including a load bearing surface and a bone facing surface, wherein said load bearing surface exhibits a contour substantially corresponding to the contour of the articular surface and said generally hemi-spherical bone facing surface is configured to be received in said generally hemispherical excision site.

10. The system of claim 9, further comprising a guide pin configured to be secured into bone beneath the articular surface of the glenoid, wherein said guide pin is configured to be disposed at an angle α

relative to said articular surface, wherein angle α

is <

90 degrees.

11. The system of claim 9, further comprising a guide pin configured to be secured into bone beneath the articular surface of the glenoid, wherein said guide pin is configured to be disposed at an angle α

relative to said articular surface, wherein 90 degrees≥

α

≥

45 degrees.

12. The system of claim 9, wherein said at least one cutter includes a first cutter and a second cutter, wherein said first and second cutters extend generally radially outwardly from said cannulated shaft at an angle approximately 180 degrees from each other.

13. The system of claim 9, wherein an overall radius R_e of said at least one cutter defines a radius of said excision site created by said excision device.

14. The system of claim 13, wherein said overall radius R_e substantially corresponds to a radius R_i of said implant.

15. The system of claim 9, wherein a depth D of said at least one cutter defines a height of said excision site created by said excision device.

16. The system of claim 15, wherein said depth D substantially corresponds to a height H of said implant.

17. The system of claim 9, wherein said load bearing surface comprises a beveled region disposed about a perimeter of said load bearing surface.

18. The system of claim 9, wherein said bone facing surface comprises at least one lip, protrusion and/or rib configured to increase a mechanical connection between said implant and bone within said excision site.

19. The system of claim 9, wherein said implant comprises at least one keel extending generally outwardly from said bone facing surface.

20. The system of claim 19, wherein said at least one keel includes a protrusion disposed about a distal end of a base region.