Osteochondral Implant Procedure and Device

• US 20080208198A1
• Filed: 02/28/2007
• Published: 08/28/2008
• Est. Priority Date: 02/28/2007
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Bharadwaj, Jeetendra, Nycz, Jeffrey H., Drapeau, Susan J., Shimko, Daniel, Kinnane, Keith M.
• Granted Patent: US 8,556,908 B2
• Time in Patent Office: Days
• US Class Current: 606/88
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/00946 malleable

Abstract

A surgical procedure according to which a slotted film is positioned over an area of a bone to be milled; and a portion of a milling assembly is inserted in the defect, with another portion of the assembly extending through one of the slots so that the slot can be used as a guide to mill the bone.

Claims

1. A surgical procedure for milling a portion fo a bone defining a defect, the procedure comprising:

positioning a slotted film over an area of the bone to be milled;

inserting a portion of a milling tool through one of the slots; and

using the slot as a guide to mill the bone.

2. The procedure of claim 1 wherein the shank of the tool is inserted through the slot and wherein the cutting portion of the tool is positioned in the defect.

3. The procedure of claim 1 further comprising guiding the axial position of the tool using at least one of the slots so that the tool mills the bottom of the defect in a manner so that the milled bottom of the defect extends substantially parallel to the original surface of the bone in which the defect is formed.

4. The procedure of claim 3 further comprising using a depth gauge on the tool that cooperates with the slot to guide the milling of the bone.

5. The procedure of claim 4 further comprising harvesting each graft from another area of the patient/recipient, or from a corresponding area of a donor.

6. The procedure of claim 1 further comprising guiding the axial position of the tool using at least one of the slots so that the tool mills the bottom of the defect in a manner so that the curvature of the milled bottom of the defect corresponds to the original curvature of the femur, before the defect occurred.

7. The procedure of claim 6 further comprising then milling at least one opening in the bottom, and implanting a graft in each opening.

8. The procedure of claim 1 wherein the milled bone forms an opening and further comprising filling the opening with an implant selected from the group consisting of an autograft, an allograft, and a xenograft.

9. The procedure of claim 1 wherein the milled bone forms an opening and further comprising filling the opening with an implant selected from the group consisting of a resorblable natural scaffold, a resorblable synthetic scaffold, a non-resorblable natural scaffold and a non-resorbable synthetic scaffold.

10. The procedure of claim 1 wherein the milled bone forms an opening and further comprising filling the opening with an implant selected from the group consisting of a resorbable resurfacing implant and a non-resorbable resurfacing implant.

11. The procedure of claim 1 wherein bone is a femur and wherein the defect is an opening in the femur.

12. The procedure of claim 11 wherein the upper surface of the femur is curved, and wherein that portion of the film extending over the defect simulates the original curve of the femur before the defect was formed.

13. A surgical assembly for guiding a tool for surgically removing a portion of a bone from a defect in a femur, the assembly comprising:

a film adapted to be placed over the defect and a portion of the femur surrounding the defect; and

at least one slot extending through the film to guide the tool.

14. The assembly of claim 13 further comprising a milling tool having a portion adapted to extend in at least one of the slots to guide the axial position of the tool as it mills the bottom of the defect so that the milled bottom of the defect extends substantially parallel to the original surface of the bone in which the defect is formed.

15. The assembly of claim 13 further comprising a milling tool having a portion adapted to extend in at least one of the slots to guide the axial position of the tool as it mills the bottom of the defect so that the curvature of the milled bottom of the defect corresponds to the original curvature of the femur, before the defect occurred.

16. The assembly of claim 13 further comprising means for adhering the film to the femur portion surrounding the defect.

17. The assembly of claim 16 wherein the outer marginal portions of the film extend over the surfaces of the femur surrounding the defect, and the remaining portion of the film extends over the defect.