Coordinate mapping system for joint treatment

• US 8,864,768 B2
• Filed: 11/19/2010
• Issued: 10/21/2014
• Est. Priority Date: 11/20/2009
• Status: Active Grant

• Current Assignee: Zimmer Knee Creations, Inc. (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Knee Creations, Inc. (Zimmer Biomet Holdings, Inc.)
• Inventors: Hanson, Shaun B., Mandeen, Christopher D., Russell, Thomas A.
• Primary Examiner(s): Yang, Andrew
• Application Number:
  US12/950,114
• Publication Number:
  US 20110125201A1
• Time in Patent Office: 1,432 Days
• Field of Search: 606/102, 606 86 R- 89, 606/96, 606/98
• US Class Current: 606/88
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/3411 with a plurality of holes, e.g. holes in matrix arrangement
• CPC Class Codes: A61B 2090/3937 Visible markers
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints

Abstract

A coordinate mapping system is provided for locating a defect in a bone. The system comprises a positioning instrument for controlled delivery of a device to a target site, the instrument comprising a main body and a rail extending from the main body, the rail including a series of indicia corresponding to predefined grid lines, and a template configured to overlay an image of a bone having a defect at the target site, the template including a predefined grid for determining a set of coordinates to locate the target site using the positioning instrument. A method of accessing a target site near a defect in a bone using the radial coordinate mapping system is also provided.

Claims

1. A coordinate mapping system comprising:

a positioning instrument for controlled delivery of a device to a target site within a bone, comprising a main body and a rail extending from the main body, the rail including a series of indicia corresponding to predetermined grid lines, the instrument further providing a series of device portals configured to guide the device into a subchondral region of the bone for treatment at the target site, the series of device portals provided on the rail for access to the target site; and

a template configured to overlay an image or the bone having a defect at the target site, the template including a predefined grid for determining a set of coordinates to locate the target site using the positioning instrument, wherein at least one of the coordinates represents an interval of a radial grid line and at least one of the coordinates represents an angular component for mapping to the target site within the bone.

2. The system of claim 1, wherein the predefined grid is a radial grid, and the grid lines are radial grid lines.

3. The system of claim 1, further including a detachable brace component.

4. The system of claim 1, wherein the rail is circular.

5. The system of claim 4, wherein the target site is a defect on a tibia.

6. The system of claim 1, wherein the rail is linear.

7. The system of claim 6, wherein the target site is a defect on a femur.

8. The system of claim 1, wherein the set of coordinates comprises three coordinates.

9. The system of claim 8, wherein the set of coordinates comprises two coordinates that represent an interval of a radial grid line, and another coordinate that represents an angular component.

10. The system of claim 1, wherein the template has a shape corresponding to the rail of the positioning instrument.

11. A method of accessing a target site near a defect in a bone:

providing a template having a predefined grid for determining a set of coordinates to locate a target site on a bone having a defect;

overlaying the template on an image of the bone, the template being aligned with an anatomical landmark on the bone;

determining a set of coordinates of the location of the defect from the grid;

providing a positioning instrument for controlled delivery of a device to the target site, comprising a main body and a rail extending from the main body, the rail including a series of indicia corresponding to predefined grid lines on the template;

aligning the positioning instrument to the anatomical landmark on the bone so that the indicia on the positioning instrument are consistent with the radial grid of the template; and

accessing the target site using the set of coordinates.

12. The method of claim 11, wherein the bone is a tibia.

13. The method of claim 12, wherein the anatomical landmark is a tubercle.

14. The method of claim 11, wherein the bone is a femur.

15. The method of claim 14, wherein the anatomical landmark is a femoral shaft axis.

16. The method of claim 11, wherein the grid is a radial grid, and the grid lines are radial grid lines.